WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02S2
Distribution Date: 08/25/2003

Class	Cusip	Orig Prin Bal	Begin Prin Bal	Int Rate Accrued	Int Rate Paid	Int Dist	Prin Dist	Int Shortfall	Prin Loss	Deferred Interest	Int Reimbursed	Unscheduled Int	Prin Reimbursed	Total Dist	Ending Class Bal
IA1	929227ME3	$75,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA2	929227MF0	$73,290,000.00	$38,809,911.76	6.5000000000%	6.5000000000%	$210,220.36	$19,826,538.42	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$20,036,758.77	$18,983,373.34
IA3	929227MG8	$20,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA4	929227MH6	$64,749,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA5	929227MJ2	$44,687,500.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA6	929227MK9	$10,312,500.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA7	929227ML7	$200,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA8	929227MM5	$41,500,000.00	$41,500,000.00	6.5000000000%	6.5000000000%	$224,791.67	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$224,791.67	$41,500,000.00
IA9	929227MN3	$11,538,461.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA10	929227NH5	$7,000,000.00	$7,000,000.00	6.5000000000%	6.5000000000%	$37,916.67	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$37,916.67	$7,000,000.00
IA11	929227NJ1	$30,000,000.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA1	929227MP8	$21,538,000.00	$5,348,538.88	6.5000000000%	6.5000000000%	$28,971.25	$1,631,971.49	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,660,942.75	$3,716,567.39
IIIA1	929227MQ6	$338,698,000.00	$89,541,885.60	6.0000000000%	6.0000000000%	$447,709.43	$13,969,855.18	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$14,417,564.60	$75,572,030.42
IP	929227MR4	$2,355,468.00	$1,330,815.49	0.0000000000%	0.0000000000%	$0.00	$219,498.43	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$219,498.43	$1,111,317.06
IIP	929227MS2	$268,797.00	$198,121.04	0.0000000000%	0.0000000000%	$0.00	$31,334.29	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$31,334.29	$166,786.75
IIIP	929227MT0	$2,854,726.00	$1,672,635.49	0.0000000000%	0.0000000000%	$0.00	$194,354.93	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$194,354.93	$1,478,280.56
CB1	929227MU7	$6,454,000.00	$6,355,048.98	6.5000000000%	6.5000000000%	$34,423.18	$6,308.52	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$40,731.71	$6,348,740.46
CB2	929227MV5	$2,217,000.00	$2,183,009.51	6.5000000000%	6.5000000000%	$11,824.63	$2,167.03	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$13,991.66	$2,180,842.48
CB3	929227MW3	$1,613,000.00	$1,588,269.90	6.5000000000%	6.5000000000%	$8,603.13	$1,576.64	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$10,179.77	$1,586,693.26
CB4	929227NB8	$806,000.00	$793,642.64	6.5000000000%	6.5000000000%	$4,298.90	$787.83	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$5,086.73	$792,854.81
CB5	929227NC6	$605,000.00	$595,724.31	6.5000000000%	6.5000000000%	$3,226.84	$591.36	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$3,818.20	$595,132.95
CB6	929227ND4	$811,758.00	$799,312.97	6.5000000000%	6.5000000000%	$4,329.61	$793.45	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$5,123.06	$798,519.52
IIIB1	929227MX1	$2,944,000.00	$2,764,335.59	6.0000000000%	6.0000000000%	$13,821.68	$11,332.78	$0.00	$0.06	$0.00	$0.00	$0.00	$0.00	$25,154.45	$2,753,002.76
IIIB2	929227MY9	$346,000.00	$324,884.55	6.0000000000%	6.0000000000%	$1,624.42	$1,331.91	$0.00	$0.01	$0.00	$0.00	$0.00	$0.00	$2,956.33	$323,552.63
IIIB3	929227MZ6	$519,000.00	$487,326.83	6.0000000000%	6.0000000000%	$2,436.63	$1,997.86	$0.00	$0.01	$0.00	$0.00	$0.00	$0.00	$4,434.50	$485,328.96
IIIB4	929227NE2	$346,000.00	$324,884.55	6.0000000000%	6.0000000000%	$1,624.42	$1,331.91	$0.00	$0.01	$0.00	$0.00	$0.00	$0.00	$2,956.33	$323,552.63
IIIB5	929227NF9	$346,000.00	$324,884.55	6.0000000000%	6.0000000000%	$1,624.42	$1,331.91	$0.00	$0.01	$0.00	$0.00	$0.00	$0.00	$2,956.33	$323,552.63
IIIB6	929227NG7	$349,065.00	$327,763.17	6.0000000000%	6.0000000000%	$1,638.82	$1,343.63	$0.00	$0.01	$0.00	$0.00	$0.00	$0.00	$2,982.44	$326,419.54
R	929227NA0	$50.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
R_SYN	XXXXXXXXX	$0.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total		$749,810,864.00	$202,270,995.81			$1,039,086.06	$35,904,447.56	$0.00	$0.10	$0.00	$0.00	$0.00	$0.00	$36,943,533.62	$166,366,548.15

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02S2
Distribution Date: 08/25/2003

Class	Orig Face	Beg Bal	Prin Loss	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IA1	$75,000,000.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IA2	$73,290,000.00	$38,809,911.76	$0.00	$0.00	$19,826,538.42	0.2590172375	$18,983,373.34
IA3	$20,000,000.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IA4	$64,749,000.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IA5	$44,687,500.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IA6	$10,312,500.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IA7	$200,000.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IA8	$41,500,000.00	$41,500,000.00	$0.00	$0.00	$0.00	1.0000000000	$41,500,000.00
IA9	$11,538,461.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IA10	$7,000,000.00	$7,000,000.00	$0.00	$0.00	$0.00	1.0000000000	$7,000,000.00
IA11	$30,000,000.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
IIA1	$21,538,000.00	$5,348,538.88	$0.00	$0.00	$1,631,971.49	0.1725586122	$3,716,567.39
IIIA1	$338,698,000.00	$89,541,885.60	$0.00	$0.00	$13,969,855.18	0.2231251156	$75,572,030.42
IP	$2,355,468.00	$1,330,815.49	$0.00	$0.00	$219,498.43	0.4718030812	$1,111,317.06
IIP	$268,797.00	$198,121.04	$0.00	$0.00	$31,334.29	0.6204933463	$166,786.75
IIIP	$2,854,726.00	$1,672,635.49	$0.00	$0.00	$194,354.93	0.5178362337	$1,478,280.56
CB1	$6,454,000.00	$6,355,048.98	$0.00	$0.00	$6,308.52	0.9836908057	$6,348,740.46
CB2	$2,217,000.00	$2,183,009.51	$0.00	$0.00	$2,167.03	0.9836907894	$2,180,842.48
CB3	$1,613,000.00	$1,588,269.90	$0.00	$0.00	$1,576.64	0.9836907998	$1,586,693.26
CB4	$806,000.00	$793,642.64	$0.00	$0.00	$787.83	0.9836908313	$792,854.81
CB5	$605,000.00	$595,724.31	$0.00	$0.00	$591.36	0.9836908264	$595,132.95
CB6	$811,758.00	$799,312.97	$0.00	$0.00	$793.45	0.9836915928	$798,519.52
IIIB1	$2,944,000.00	$2,764,335.59	$0.06	$0.00	$11,332.78	0.9351232201	$2,753,002.76
IIIB2	$346,000.00	$324,884.55	$0.01	$0.00	$1,331.91	0.9351232081	$323,552.63
IIIB3	$519,000.00	$487,326.83	$0.01	$0.00	$1,997.86	0.9351232370	$485,328.96
IIIB4	$346,000.00	$324,884.55	$0.01	$0.00	$1,331.91	0.9351232081	$323,552.63
IIIB5	$346,000.00	$324,884.55	$0.01	$0.00	$1,331.91	0.9351232081	$323,552.63
IIIB6	$349,065.00	$327,763.17	$0.01	$0.00	$1,343.63	0.9351253778	$326,419.54
R	$50.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
R_SYN	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
Total	$749,810,864.00	$202,270,995.81	$0.10	$0.00	$35,904,447.56	0.2218780177	$166,366,548.15

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02S2
Distribution Date: 08/25/2003
PER $1000 DENOMINATION
Class	Orig Face	Beg Bal	Prin Loss	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IA1	$75,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IA2	$73,290,000.00	529.53897885	0.00000000	0.00000000	270.52174130	0.2590172375	259.01723755
IA3	$20,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IA4	$64,749,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IA5	$44,687,500.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IA6	$10,312,500.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IA7	$200,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IA8	$41,500,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	1.0000000000	1,000.00000000
IA9	$11,538,461.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IA10	$7,000,000.00	1,000.00000000	0.00000000	0.00000000	0.00000000	1.0000000000	1,000.00000000
IA11	$30,000,000.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
IIA1	$21,538,000.00	248.33034079	0.00000000	0.00000000	75.77172857	0.1725586122	172.55861222
IIIA1	$338,698,000.00	264.37087199	0.00000000	0.00000000	41.24575634	0.2231251156	223.12511565
IP	$2,355,468.00	564.98984066	0.00000000	0.00000000	93.18675949	0.4718030812	471.80308117
IIP	$268,797.00	737.06566666	0.00000000	0.00000000	116.57232038	0.6204933463	620.49334628
IIIP	$2,854,726.00	585.91804958	0.00000000	0.00000000	68.08181591	0.5178362337	517.83623367
CB1	$6,454,000.00	984.66826464	0.00000000	0.00000000	0.97745894	0.9836908057	983.69080570
CB2	$2,217,000.00	984.66824989	0.00000000	0.00000000	0.97746053	0.9836907894	983.69078935
CB3	$1,613,000.00	984.66825790	0.00000000	0.00000000	0.97745815	0.9836907998	983.69079975
CB4	$806,000.00	984.66828784	0.00000000	0.00000000	0.97745658	0.9836908313	983.69083127
CB5	$605,000.00	984.66828099	0.00000000	0.00000000	0.97745455	0.9836908264	983.69082645
CB6	$811,758.00	984.66903929	0.00000000	0.00000000	0.97744648	0.9836915928	983.69159281
IIIB1	$2,944,000.00	938.97268682	0.00002038	0.00000000	3.84944973	0.9351232201	935.12322011
IIIB2	$346,000.00	938.97268786	0.00002890	0.00000000	3.84945087	0.9351232081	935.12320809
IIIB3	$519,000.00	938.97269750	0.00001927	0.00000000	3.84944123	0.9351232370	935.12323699
IIIB4	$346,000.00	938.97268786	0.00002890	0.00000000	3.84945087	0.9351232081	935.12320809
IIIB5	$346,000.00	938.97268786	0.00002890	0.00000000	3.84945087	0.9351232081	935.12320809
IIIB6	$349,065.00	938.97460358	0.00002865	0.00000000	3.84922579	0.9351253778	935.12537779
R	$50.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
R_SYN	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02S2
Distribution Date: 08/25/2003

Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IA1	$75,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA2	$73,290,000.00	6.5000000000%	6.5000000000%	$38,809,911.76	$210,220.36	$0.00	$0.00	$0.00	$210,220.36
IA3	$20,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA4	$64,749,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA5	$44,687,500.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA6	$10,312,500.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA7	$200,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA8	$41,500,000.00	6.5000000000%	6.5000000000%	$41,500,000.00	$224,791.67	$0.00	$0.00	$0.00	$224,791.67
IA9	$11,538,461.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IA10	$7,000,000.00	6.5000000000%	6.5000000000%	$7,000,000.00	$37,916.67	$0.00	$0.00	$0.00	$37,916.67
IA11	$30,000,000.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
IIA1	$21,538,000.00	6.5000000000%	6.5000000000%	$5,348,538.88	$28,971.25	$0.00	$0.00	$0.00	$28,971.25
IIIA1	$338,698,000.00	6.0000000000%	6.0000000000%	$89,541,885.60	$447,709.43	$0.00	$0.00	$0.00	$447,709.43
IP	$2,355,468.00	0.0000000000%	0.0000000000%	$1,330,815.49	$0.00	$0.00	$0.00	$0.00	$0.00
IIP	$268,797.00	0.0000000000%	0.0000000000%	$198,121.04	$0.00	$0.00	$0.00	$0.00	$0.00
IIIP	$2,854,726.00	0.0000000000%	0.0000000000%	$1,672,635.49	$0.00	$0.00	$0.00	$0.00	$0.00
CB1	$6,454,000.00	6.5000000000%	6.5000000000%	$6,355,048.98	$34,423.18	$0.00	$0.00	$0.00	$34,423.18
CB2	$2,217,000.00	6.5000000000%	6.5000000000%	$2,183,009.51	$11,824.63	$0.00	$0.00	$0.00	$11,824.63
CB3	$1,613,000.00	6.5000000000%	6.5000000000%	$1,588,269.90	$8,603.13	$0.00	$0.00	$0.00	$8,603.13
CB4	$806,000.00	6.5000000000%	6.5000000000%	$793,642.64	$4,298.90	$0.00	$0.00	$0.00	$4,298.90
CB5	$605,000.00	6.5000000000%	6.5000000000%	$595,724.31	$3,226.84	$0.00	$0.00	$0.00	$3,226.84
CB6	$811,758.00	6.5000000000%	6.5000000000%	$799,312.97	$4,329.61	$0.00	$0.00	$0.00	$4,329.61
IIIB1	$2,944,000.00	6.0000000000%	6.0000000000%	$2,764,335.59	$13,821.68	$0.00	$0.00	$0.00	$13,821.68
IIIB2	$346,000.00	6.0000000000%	6.0000000000%	$324,884.55	$1,624.42	$0.00	$0.00	$0.00	$1,624.42
IIIB3	$519,000.00	6.0000000000%	6.0000000000%	$487,326.83	$2,436.63	$0.00	$0.00	$0.00	$2,436.63
IIIB4	$346,000.00	6.0000000000%	6.0000000000%	$324,884.55	$1,624.42	$0.00	$0.00	$0.00	$1,624.42
IIIB5	$346,000.00	6.0000000000%	6.0000000000%	$324,884.55	$1,624.42	$0.00	$0.00	$0.00	$1,624.42
IIIB6	$349,065.00	6.0000000000%	6.0000000000%	$327,763.17	$1,638.82	$0.00	$0.00	$0.00	$1,638.82
R	$50.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
R_SYN	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total	$749,810,864.00			$202,270,995.81	$1,039,086.06	$0.00	$0.00	$0.00	$1,039,086.06

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02S2
Distribution Date: 08/25/2003
PER $1000 DENOMINATION
Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IA1	$75,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IA2	$73,290,000.00	6.5000000000%	6.5000000000%	529.53897885	2.86833620	0.00000000	0.00000000	0.00000000	2.86833620
IA3	$20,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IA4	$64,749,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IA5	$44,687,500.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IA6	$10,312,500.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IA7	$200,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IA8	$41,500,000.00	6.5000000000%	6.5000000000%	1,000.00000000	5.41666675	0.00000000	0.00000000	0.00000000	5.41666675
IA9	$11,538,461.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IA10	$7,000,000.00	6.5000000000%	6.5000000000%	1,000.00000000	5.41666714	0.00000000	0.00000000	0.00000000	5.41666714
IA11	$30,000,000.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIA1	$21,538,000.00	6.5000000000%	6.5000000000%	248.33034079	1.34512257	0.00000000	0.00000000	0.00000000	1.34512257
IIIA1	$338,698,000.00	6.0000000000%	6.0000000000%	264.37087199	1.32185437	0.00000000	0.00000000	0.00000000	1.32185437
IP	$2,355,468.00	0.0000000000%	0.0000000000%	564.98984066	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIP	$268,797.00	0.0000000000%	0.0000000000%	737.06566666	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
IIIP	$2,854,726.00	0.0000000000%	0.0000000000%	585.91804958	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
CB1	$6,454,000.00	6.5000000000%	6.5000000000%	984.66826464	5.33361946	0.00000000	0.00000000	0.00000000	5.33361946
CB2	$2,217,000.00	6.5000000000%	6.5000000000%	984.66824989	5.33361750	0.00000000	0.00000000	0.00000000	5.33361750
CB3	$1,613,000.00	6.5000000000%	6.5000000000%	984.66825790	5.33362058	0.00000000	0.00000000	0.00000000	5.33362058
CB4	$806,000.00	6.5000000000%	6.5000000000%	984.66828784	5.33362283	0.00000000	0.00000000	0.00000000	5.33362283
CB5	$605,000.00	6.5000000000%	6.5000000000%	984.66828099	5.33361983	0.00000000	0.00000000	0.00000000	5.33361983
CB6	$811,758.00	6.5000000000%	6.5000000000%	984.66903929	5.33362160	0.00000000	0.00000000	0.00000000	5.33362160
IIIB1	$2,944,000.00	6.0000000000%	6.0000000000%	938.97268682	4.69486413	0.00000000	0.00000000	0.00000000	4.69486413
IIIB2	$346,000.00	6.0000000000%	6.0000000000%	938.97268786	4.69485549	0.00000000	0.00000000	0.00000000	4.69485549
IIIB3	$519,000.00	6.0000000000%	6.0000000000%	938.97269750	4.69485549	0.00000000	0.00000000	0.00000000	4.69485549
IIIB4	$346,000.00	6.0000000000%	6.0000000000%	938.97268786	4.69485549	0.00000000	0.00000000	0.00000000	4.69485549
IIIB5	$346,000.00	6.0000000000%	6.0000000000%	938.97268786	4.69485549	0.00000000	0.00000000	0.00000000	4.69485549
IIIB6	$349,065.00	6.0000000000%	6.0000000000%	938.97460358	4.69488491	0.00000000	0.00000000	0.00000000	4.69488491
R	$50.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
R_SYN	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
SERIES: WAMU 02S2 WEIGHTED AVERAGE PC RATE: 6.40669%
POOL NUMBER: Group 1(1825,1826)
ISSUE DATE: 02/27/2002
CERTIFICATE BALANCE AT ISSUE: $403,408,073.64
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	252		$106,502,395.50
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$105,895.51
Unscheduled Principal Collection/Reversals		$13,764.55
Liquidations-in-full	49	$21,601,907.42
Net principal Distributed		$21,721,567.48	-$21,721,567.48

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	203		$84,780,828.02

SCHEDULED INTEREST AT MORTGAGE RATE:		$604,819.76

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$36,213.54

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$22,290,173.70

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
SERIES: WAMU 02S2 WEIGHTED AVERAGE PC RATE: 6.41373%
POOL NUMBER: 1825
ISSUE DATE: 02/27/2002
CERTIFICATE BALANCE AT ISSUE: $380,903,507.36
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	238		$100,268,698.40
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$99,632.19
Unscheduled Principal Collection/Reversals		$13,171.07
Liquidations-in-full	45	$19,944,771.06
Net principal Distributed		$20,057,574.32	-$20,057,574.32

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	193		$80,211,124.08

SCHEDULED INTEREST AT MORTGAGE RATE:		$570,411.98

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$34,498.47

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$20,593,487.83

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
SERIES: WAMU 02S2 WEIGHTED AVERAGE PC RATE: 6.29342%
POOL NUMBER: 1826
ISSUE DATE: 02/27/2002
CERTIFICATE BALANCE AT ISSUE: $22,504,566.28
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	14		$6,233,697.10
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$6,263.32
Unscheduled Principal Collection/Reversals		$593.48
Liquidations-in-full	4	$1,657,136.36
Net principal Distributed		$1,663,993.16	-$1,663,993.16

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	10		$4,569,703.94

SCHEDULED INTEREST AT MORTGAGE RATE:		$34,407.78

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$1,715.07

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$1,696,685.87

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
SERIES: WAMU 02S2 WEIGHTED AVERAGE PC RATE: 5.89521%
POOL NUMBER: 1827
ISSUE DATE: 02/27/2002
CERTIFICATE BALANCE AT ISSUE: $346,402,791.12
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	220		$95,768,600.32
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$392,765.53
Unscheduled Principal Collection/Reversals		$164,248.69
Liquidations-in-full	31	$13,625,865.96
Net principal Distributed		$14,182,880.18	-$14,182,880.18

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	189		$81,585,720.14

SCHEDULED INTEREST AT MORTGAGE RATE:		$502,779.75

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$32,300.01

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$14,653,359.92

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
SERIES: WAMU 02S2 WEIGHTED AVERAGE PC RATE: 6.16452%
POOL NUMBER: ALL
ISSUE DATE: 02/27/2002
CERTIFICATE BALANCE AT ISSUE: $749,810,864.76
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	472		$202,270,995.82
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$498,661.04
Unscheduled Principal Collection/Reversals		$178,013.24
Liquidations-in-full	80	$35,227,773.38
Net principal Distributed		$35,904,447.66	-$35,904,447.66

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	392		$166,366,548.16

SCHEDULED INTEREST AT MORTGAGE RATE:		$1,107,599.51

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
08/2003 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$68,513.55

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$36,943,533.62

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02S2
Distribution Date: 08/25/2003

Distribution by Group
Pool ID		Principal		Interest		Total
Group 1(1825,1826)		$21,721,567.48		$568,606.22		$22,290,173.70
Pool - 1825		$20,057,574.32		$535,913.51		$20,593,487.83
Pool - 1826		$1,663,993.16		$32,692.71		$1,696,685.87
Pool - 1827		$14,182,880.18		$470,479.74		$14,653,359.92
Aggregate		$35,904,447.66		$1,039,085.96		$36,943,533.62

Number of Loans and Aggregate Principal Balance By Group
Pool ID	Beg Bal	Beg Count	Paid Off / Liq Count	Rem Count	Sched Prin End Bal	Sched Prin	Prin PrePay / Liq	Unsched Prin / Rev	Total Prin
Group 1(1825,1826)	$106,502,395.50	252	49	203	$84,780,828.02	$105,895.51	$21,601,907.42	$13,764.55	$21,721,567.48
Pool - 1825	$100,268,698.40	238	45	193	$80,211,124.08	$99,632.19	$19,944,771.06	$13,171.07	$20,057,574.32
Pool - 1826	$6,233,697.10	14	4	10	$4,569,703.94	$6,263.32	$1,657,136.36	$593.48	$1,663,993.16
Pool - 1827	$95,768,600.32	220	31	189	$81,585,720.14	$392,765.53	$13,625,865.96	$164,248.69	$14,182,880.18
Aggregate	$202,270,995.82	472	80	392	$166,366,548.16	$498,661.04	$35,227,773.38	$178,013.24	$35,904,447.66

Delinquency Information by Group
Pool ID	1 Month Count	Sched End Balance	2 Months Count	Sched End Balance	3 Months Count	Sched End Balance	4 Months Count	Sched End Balance
Group 1(1825,1826)	2	$907,912.30	0	$0.00	1	$523,942.52	0	$0.00
Pool - 1825	2	$907,912.30	0	$0.00	1	$523,942.52	0	$0.00
Pool - 1826	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Pool - 1827	1	$414,610.13	0	$0.00	0	$0.00	0	$0.00
Aggregate	3	$1,322,522.43	0	$0.00	1	$523,942.52	0	$0.00

Foreclosure and REO Information by Group
Pool ID		Foreclosure Count		Sched End Balance		REO Count		Sched End Balance
Group 1(1825,1826)		0		$0.00		0		$0.00
Pool - 1825		0		$0.00		0		$0.00
Pool - 1826		0		$0.00		0		$0.00
Pool - 1827		0		$0.00		0		$0.00
Aggregate		0		$0.00		0		$0.00

Aggregate Loss Amounts by Group
Pool ID			Count			Loss Amount
Group 1(1825,1826)			0			$0.00
Group 2(1827)			0			$0.00
Aggregate			0			$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02S2
Distribution Date: 08/25/2003

INSURANCE RESERVES - Group 1(1825,1826)
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$0.00	$0.00	$0.00	$0.00	$0.00
Bankruptcy Bond
Single-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$0.00	$0.00	$0.00	$0.00	$0.00

INSURANCE RESERVES - Group 2(1827)
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$0.00	$0.00	$0.00	$0.00	$0.00
Bankruptcy Bond
Single-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$0.00	$0.00	$0.00	$0.00	$0.00

INSURANCE RESERVES - Aggregate
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$0.00	$0.00	$0.00	$0.00	$0.00
Bankruptcy Bond
Single-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$0.00	$0.00	$0.00	$0.00	$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.02S2
Distribution Date: 08/25/2003

The Class Principal Balances of each Class of the Class CB1,CB2,CB3,CB4,CB5,CB6 Certificatesimmediately after the principal and interest distribution on 200308 are as follows:

Class			Class Principal Balance
CB1			$6,348,740.46
CB2			$2,180,842.48
CB3			$1,586,693.26
CB4			$792,854.81
CB5			$595,132.95
CB6			$798,519.52
Total			$12,302,783.48
Capitalized items used but not defined herein have the meanings ascribed to them in the Prospectus Supplement.

The Class Principal Balances of each Class of the Class IIIB1,IIIB2,IIIB3,IIIB4,IIIB5,IIIB6 Certificatesimmediately after the principal and interest distribution on 200308 are as follows:

Class			Class Principal Balance
IIIB1			$2,753,002.76
IIIB2			$323,552.63
IIIB3			$485,328.96
IIIB4			$323,552.63
IIIB5			$323,552.63
IIIB6			$326,419.54
Total			$4,535,409.15
Capitalized items used but not defined herein have the meanings ascribed to them in the Prospectus Supplement.

WAMU MORTGAGE PASS THROUGH CERTIFICATES SERIES 2002-S2 8-K