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National Weather Service Marine Forecast FZUS56 KSEW

FZUS56 KSEW 170828
CWFSEW

Coastal Waters Forecast for Washington
National Weather Service Seattle WA
128 AM PDT Mon Aug 17 2026

Inland waters of western Washington and the northern and central Washington coastal waters including the Olympic Coast National Marine Sanctuary

PZZ100-172130
128 AM PDT Mon Aug 17 2026

.SYNOPSIS FOR THE NORTHERN AND CENTRAL WASHINGTON COASTAL AND INLAND WATERS...High pressure well offshore will continue to strengthen through the week. A weak system approaches the waters Tuesday with little impact. A stronger system is expected late in the week.

PZZ150-172130
Coastal Waters From Cape Flattery To James Island Out 10 Nm
128 AM PDT Mon Aug 17 2026

TODAY
W wind around 5 kt. Seas 3 to 4 ft. Wave Detail: NW 3 ft at 6 seconds, W 2 ft at 9 seconds and SW 2 ft at 15 seconds. Patchy dense fog.

TONIGHT
SW wind around 5 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 7 seconds and SW 2 ft at 15 seconds. Patchy dense fog in the evening.

TUE
S wind around 5 kt. Seas 5 to 6 ft. Wave Detail: W 5 ft at 7 seconds, W 3 ft at 14 seconds and SW 2 ft at 15 seconds.

TUE NIGHT
W wind around 5 kt. Seas 5 to 6 ft. Wave Detail: W 4 ft at 7 seconds, W 3 ft at 13 seconds and SW 2 ft at 14 seconds.

WED
S wind around 5 kt. Seas 5 to 6 ft. Wave Detail: W 4 ft at 6 seconds, W 5 ft at 12 seconds and SW 2 ft at 14 seconds.

WED NIGHT
NW wind around 5 kt in the evening, becoming light and variable. Seas 5 to 6 ft. Wave Detail: NW 2 ft at 6 seconds, W 5 ft at 12 seconds and SW 2 ft at 14 seconds.

THU
SE wind around 5 kt, veering to SW in the afternoon. Seas around 5 ft. Wave Detail: W 2 ft at 7 seconds, W 5 ft at 11 seconds and SW 2 ft at 15 seconds.

THU NIGHT
W wind around 5 kt. Seas 4 to 5 ft. Wave Detail: W 2 ft at 6 seconds, W 4 ft at 11 seconds and SW 2 ft at 15 seconds.

FRI
S wind around 5 kt. Seas 4 to 5 ft. Wave Detail: NW 2 ft at 7 seconds, W 4 ft at 10 seconds and SW 2 ft at 15 seconds.

FRI NIGHT
S wind around 5 kt. Seas around 4 ft. Wave Detail: W 2 ft at 6 seconds and W 4 ft at 9 seconds.

PZZ153-172130
Coastal Waters From James Island To Point Grenville Out 10 Nm
128 AM PDT Mon Aug 17 2026

TODAY
NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: NW 3 ft at 6 seconds, W 2 ft at 9 seconds and SW 2 ft at 15 seconds.

TONIGHT
NW wind around 5 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 7 seconds, SW 2 ft at 15 seconds and W 2 ft at 16 seconds. Patchy dense fog.

TUE
SW wind around 5 kt. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds, W 3 ft at 14 seconds and SW 2 ft at 15 seconds.

TUE NIGHT
NW wind around 5 kt. Seas 5 to 6 ft. Wave Detail: W 5 ft at 7 seconds, W 3 ft at 13 seconds and SW 2 ft at 14 seconds.

WED
S wind around 5 kt. Seas 5 to 6 ft. Wave Detail: W 4 ft at 7 seconds, W 6 ft at 12 seconds and SW 2 ft at 14 seconds.

WED NIGHT
NW wind around 5 kt. Seas 5 to 6 ft. Wave Detail: NW 3 ft at 7 seconds, W 5 ft at 12 seconds and SW 2 ft at 14 seconds.

THU
Light and variable winds, becoming SW around 5 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: W 3 ft at 8 seconds, W 5 ft at 11 seconds and SW 2 ft at 15 seconds.

THU NIGHT
NW wind around 5 kt. Seas 4 to 5 ft. Wave Detail: W 3 ft at 7 seconds and W 5 ft at 10 seconds.

FRI
S wind around 5 kt. Seas 4 to 5 ft. Wave Detail: W 4 ft at 9 seconds.

FRI NIGHT
S wind around 5 kt. Seas 3 to 5 ft. Wave Detail: W 4 ft at 9 seconds.

PZZ156-172130
Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm
128 AM PDT Mon Aug 17 2026

TODAY
NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: NW 4 ft at 6 seconds, W 2 ft at 9 seconds and SW 2 ft at 15 seconds.

TONIGHT
NW wind 5 to 10 kt, easing to around 5 kt after midnight. Seas 4 to 5 ft. Wave Detail: NW 4 ft at 7 seconds, SW 2 ft at 15 seconds and W 2 ft at 17 seconds.

TUE
W wind around 5 kt, rising to 5 to 10 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds, W 2 ft at 15 seconds and SW 2 ft at 15 seconds.

TUE NIGHT
NW wind 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: W 5 ft at 7 seconds, W 3 ft at 13 seconds and SW 2 ft at 14 seconds.

WED
W wind around 5 kt. Seas 4 to 6 ft. Wave Detail: W 4 ft at 7 seconds and W 5 ft at 12 seconds.

WED NIGHT
NW wind around 5 kt. Seas 4 to 5 ft. Wave Detail: W 4 ft at 8 seconds and W 5 ft at 12 seconds.

THU
Light and variable winds, becoming W 5 to 10 kt in the afternoon. Seas 4 to 5 ft. Wave Detail: W 3 ft at 7 seconds and W 5 ft at 11 seconds.

THU NIGHT
NW wind 5 to 10 kt, backing to W after midnight. Seas 4 to 5 ft. Wave Detail: W 4 ft at 9 seconds.

FRI
S wind 5 to 10 kt. Seas around 4 ft. Wave Detail: W 4 ft at 9 seconds.

FRI NIGHT
S wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 8 seconds and W 3 ft at 10 seconds.

PZZ170-172130
Coastal Waters From Cape Flattery To James Island 10 To 60 Nm
128 AM PDT Mon Aug 17 2026

TODAY
NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 6 seconds, W 2 ft at 9 seconds and SW 3 ft at 15 seconds. Patchy dense fog this morning.

TONIGHT
NW wind 5 to 10 kt, becoming W 10 to 15 kt after midnight. Seas 5 to 7 ft. Wave Detail: NW 7 ft at 7 seconds, SW 2 ft at 15 seconds and W 2 ft at 17 seconds.

TUE
NW wind 10 to 15 kt. Seas 6 to 9 ft. Wave Detail: NW 7 ft at 7 seconds, W 3 ft at 14 seconds and SW 2 ft at 15 seconds.

TUE NIGHT
NW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Seas 5 to 8 ft. Wave Detail: NW 7 ft at 6 seconds, W 4 ft at 12 seconds and SW 2 ft at 14 seconds.

WED
NW wind 5 to 10 kt. Seas 6 to 8 ft. Wave Detail: NW 5 ft at 7 seconds, W 6 ft at 12 seconds and SW 2 ft at 14 seconds.

WED NIGHT
NW wind 5 to 10 kt, easing to around 5 kt after midnight. Seas 5 to 6 ft. Wave Detail: NW 2 ft at 7 seconds, W 6 ft at 11 seconds and SW 2 ft at 14 seconds.

THU
NW wind around 5 kt, backing to SW around 5 kt in the afternoon. Seas 5 to 6 ft. Wave Detail: W 2 ft at 7 seconds, W 6 ft at 11 seconds and SW 2 ft at 15 seconds.

THU NIGHT
NW wind around 5 kt. Seas around 5 ft. Wave Detail: W 5 ft at 9 seconds and SW 2 ft at 15 seconds.

FRI
S wind around 5 kt. Seas 4 to 5 ft. Wave Detail: W 5 ft at 9 seconds and SW 2 ft at 15 seconds.

FRI NIGHT
S wind around 5 kt. Seas 4 to 5 ft. Wave Detail: W 4 ft at 9 seconds and S 2 ft at 14 seconds.

PZZ173-172130
Coastal Waters From James Island To Point Grenville 10 To 60 Nm
128 AM PDT Mon Aug 17 2026

TODAY
NW wind 5 to 10 kt, rising to 10 to 15 kt late. Seas 4 to 6 ft. Wave Detail: NW 5 ft at 5 seconds, W 2 ft at 9 seconds and SW 2 ft at 15 seconds.

TONIGHT
NW wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: NW 7 ft at 7 seconds, SW 2 ft at 15 seconds and W 2 ft at 17 seconds.

TUE
NW wind 15 to 20 kt. Seas 6 to 9 ft. Wave Detail: NW 8 ft at 7 seconds, W 3 ft at 15 seconds and SW 2 ft at 15 seconds.

TUE NIGHT
NW wind 10 to 15 kt. Seas 6 to 9 ft. Wave Detail: NW 7 ft at 7 seconds, W 4 ft at 12 seconds and SW 2 ft at 14 seconds.

WED
NW wind 10 to 15 kt, easing to 5 to 10 kt in the afternoon. Seas 6 to 8 ft. Wave Detail: NW 6 ft at 7 seconds, W 6 ft at 12 seconds and SW 2 ft at 14 seconds.

WED NIGHT
NW wind 5 to 10 kt. Seas 6 to 7 ft. Wave Detail: NW 4 ft at 7 seconds, W 6 ft at 12 seconds and SW 2 ft at 14 seconds.

THU
NW wind around 5 kt. Seas 5 to 7 ft. Wave Detail: W 5 ft at 8 seconds, W 6 ft at 11 seconds and SW 2 ft at 15 seconds.

THU NIGHT
NW wind around 5 kt. Seas 5 to 6 ft. Wave Detail: W 5 ft at 9 seconds and SW 2 ft at 15 seconds.

FRI
S wind around 5 kt. Seas 5 to 6 ft. Wave Detail: NW 5 ft at 9 seconds and SW 2 ft at 15 seconds.

FRI NIGHT
S wind 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: W 5 ft at 9 seconds and SW 2 ft at 14 seconds.

PZZ176-172130
Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm
128 AM PDT Mon Aug 17 2026

TODAY
NW wind 5 to 10 kt, rising to 10 to 15 kt late. Seas 4 to 6 ft. Wave Detail: NW 5 ft at 6 seconds, W 2 ft at 9 seconds and SW 2 ft at 15 seconds.

TONIGHT
NW wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: NW 6 ft at 7 seconds and SW 2 ft at 15 seconds.

TUE
NW wind 10 to 15 kt. Seas 6 to 9 ft. Wave Detail: NW 8 ft at 7 seconds, W 3 ft at 14 seconds and SW 2 ft at 15 seconds.

TUE NIGHT
NW wind 10 to 15 kt. Seas 6 to 8 ft. Wave Detail: NW 7 ft at 7 seconds, W 3 ft at 13 seconds and SW 2 ft at 14 seconds.

WED
NW wind 10 to 15 kt, easing to 5 to 10 kt in the afternoon. Seas 6 to 8 ft. Wave Detail: NW 6 ft at 7 seconds, W 6 ft at 12 seconds and SW 2 ft at 14 seconds.

WED NIGHT
NW wind 10 to 15 kt, becoming N 5 to 10 kt after midnight. Seas 5 to 8 ft. Wave Detail: NW 6 ft at 8 seconds, W 6 ft at 12 seconds and SW 2 ft at 14 seconds.

THU
NW wind around 5 kt. Seas 5 to 6 ft. Wave Detail: NW 5 ft at 8 seconds, NW 6 ft at 11 seconds and SW 2 ft at 15 seconds.

THU NIGHT
NW wind 5 to 10 kt. Seas 5 to 6 ft. Wave Detail: NW 5 ft at 9 seconds and SW 2 ft at 15 seconds.

FRI
S wind 5 to 10 kt. Seas around 5 ft. Wave Detail: NW 5 ft at 9 seconds and SW 2 ft at 15 seconds.

FRI NIGHT
SW wind 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: W 4 ft at 9 seconds and SW 2 ft at 14 seconds.

PZZ130-172130
West Entrance U.S. Waters Strait Of Juan De Fuca
128 AM PDT Mon Aug 17 2026

TODAY
W wind 5 to 10 kt, easing to around 5 kt this morning, rising to 5 to 10 kt this afternoon. Seas around 3 ft. Wave Detail: W 3 ft at 6 seconds. Patchy dense fog this morning.

TONIGHT
W wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: W 3 ft at 7 seconds.

TUE
W wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 8 seconds and W 2 ft at 14 seconds.

TUE NIGHT
W wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: W 3 ft at 7 seconds and W 3 ft at 12 seconds.

WED
SW wind around 5 kt, veering to W in the afternoon. Seas 3 to 4 ft. Wave Detail: W 3 ft at 6 seconds and W 4 ft at 12 seconds.

WED NIGHT
W wind around 5 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 12 seconds.

THU
S wind around 5 kt, veering to W in the afternoon. Seas 3 to 4 ft. Wave Detail: W 4 ft at 11 seconds.

THU NIGHT
W wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 11 seconds.

FRI
W wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 10 seconds.

FRI NIGHT
W wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: W 3 ft at 9 seconds.

PZZ131-172130
Central U.S. Waters Strait Of Juan De Fuca
128 AM PDT Mon Aug 17 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT EARLY THIS MORNING

TODAY
W wind 10 to 15 kt, easing to 5 to 10 kt. Waves around 2 ft or less.

TONIGHT
W wind 10 to 15 kt. Waves around 2 ft or less.

TUE
W wind 5 to 10 kt, easing to around 5 kt in the afternoon. Waves around 2 ft or less.

TUE NIGHT
W wind 10 to 15 kt. Waves around 2 ft or less, then around 3 ft after midnight.

WED
W wind 5 to 10 kt, becoming NE in the afternoon. Waves around 2 ft or less.

WED NIGHT
W wind around 5 kt. Waves around 2 ft or less.

THU
W wind around 5 kt, veering to N in the afternoon. Waves around 2 ft or less.

THU NIGHT
W wind 5 to 10 kt. Waves around 2 ft or less.

FRI
W wind 5 to 10 kt. Waves around 2 ft or less.

FRI NIGHT
W wind 15 to 20 kt, easing to 10 to 15 kt after midnight. Waves around 3 ft.

PZZ132-172130
East Entrance U.S. Waters Strait Of Juan De Fuca
128 AM PDT Mon Aug 17 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT EARLY THIS MORNING

TODAY
W wind 5 to 10 kt. Waves around 2 ft or less. Patchy dense fog early this morning.

TONIGHT
SW wind 5 to 10 kt. Waves around 2 ft or less.

TUE
SW wind around 5 kt. Waves around 2 ft or less.

TUE NIGHT
W wind 5 to 10 kt. Waves around 2 ft or less.

WED
S wind around 5 kt, veering to NW in the afternoon. Waves around 2 ft or less.

WED NIGHT
W wind around 5 kt. Waves around 2 ft or less.

THU
NW wind around 5 kt. Waves around 2 ft or less.

THU NIGHT
W wind 5 to 10 kt. Waves around 2 ft or less.

FRI
W wind around 5 kt. Waves around 2 ft or less.

FRI NIGHT
W wind 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Waves around 2 ft or less.

PZZ134-172130
Admiralty Inlet
128 AM PDT Mon Aug 17 2026

TODAY
NW wind around 5 kt. Waves around 2 ft or less. Patchy dense fog early this morning.

TONIGHT
NW wind around 5 kt, backing to S after midnight. Waves around 2 ft or less. Patchy fog after midnight.

TUE
SE wind around 5 kt, backing to N around 5 kt in the afternoon. Waves around 2 ft or less.

TUE NIGHT
NW wind around 5 kt, backing to SW around 5 kt after midnight. Waves around 2 ft or less.

WED
S wind around 5 kt, backing to N around 5 kt in the afternoon. Waves around 2 ft or less.

WED NIGHT
NW wind around 5 kt. Waves around 2 ft or less.

THU
Light and variable winds, becoming NW 5 to 10 kt in the afternoon. Waves around 2 ft or less.

THU NIGHT
NW wind 5 to 10 kt, becoming W after midnight. Waves around 2 ft or less.

FRI
S wind around 5 kt, veering to NW in the afternoon. Waves around 2 ft or less.

FRI NIGHT
NW wind 5 to 10 kt, becoming SW after midnight. Waves around 2 ft or less.

PZZ133-172130
Northern Inland Waters Including The San Juan Islands
128 AM PDT Mon Aug 17 2026

TODAY
S wind around 5 kt, veering to SW this afternoon. Waves around 2 ft or less. Patchy dense fog.

TONIGHT
S wind around 5 kt. Waves around 2 ft or less.

TUE
S wind around 5 kt. Waves around 2 ft or less.

TUE NIGHT
S wind around 5 kt. Waves around 2 ft or less.

WED
S wind around 5 kt. Waves around 2 ft or less.

WED NIGHT
W wind around 5 kt in the evening, becoming light and variable. Waves around 2 ft or less.

THU
Light and variable winds, becoming NW around 5 kt in the afternoon. Waves around 2 ft or less.

THU NIGHT
SW wind around 5 kt, backing to S after midnight. Waves around 2 ft or less.

FRI
S wind around 5 kt. Waves around 2 ft or less.

FRI NIGHT
S wind 5 to 10 kt. Waves around 2 ft or less.

PZZ135-172130
Puget Sound and Hood Canal
128 AM PDT Mon Aug 17 2026

TODAY
N wind around 5 kt after midnight, becoming light and variable, then becoming N around 5 kt late this morning and afternoon. Waves around 2 ft or less. Patchy dense fog early this morning.

TONIGHT
N wind around 5 kt, backing to SW after midnight. Waves around 2 ft or less.

TUE
S wind around 5 kt. Waves around 2 ft or less.

TUE NIGHT
W wind 5 to 10 kt, becoming SW after midnight. Waves around 2 ft or less.

WED
S wind around 5 kt. Waves around 2 ft or less.

WED NIGHT
NW wind around 5 kt. Waves around 2 ft or less.

THU
Light and variable winds, becoming N around 5 kt in the afternoon. Waves around 2 ft or less.

THU NIGHT
NW wind around 5 kt. Waves around 2 ft or less.

FRI
SW wind around 5 kt. Waves around 2 ft or less.

FRI NIGHT
W wind 5 to 10 kt, backing to SW after midnight. Waves around 2 ft or less.

PZZ110-172130
Grays Harbor Bar
128 AM PDT Mon Aug 17 2026

Combined seas 2 to 3 ft. Bar conditions light. Maximum ebb currents will occur around 815 AM Monday, 845 PM Monday, and 900 AM Tuesday.