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National Weather Service Marine Forecast FZUS56 KSEW

FZUS56 KSEW 180834
CWFSEW

Coastal Waters Forecast for Washington
National Weather Service Seattle WA
134 AM PDT Tue Aug 18 2026

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

PZZ100-182145
134 AM PDT Tue Aug 18 2026

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

PZZ150-182145
Coastal Waters From Cape Flattery To James Island Out 10 Nm
134 AM PDT Tue Aug 18 2026

TODAY
S wind 5 to 10 kt, veering to SW late. Seas 4 to 6 ft. Wave Detail: W 5 ft at 8 seconds, W 3 ft at 13 seconds and SW 2 ft at 15 seconds.

TONIGHT
SW wind around 5 kt. Seas 5 to 6 ft. Wave Detail: W 4 ft at 7 seconds, W 3 ft at 12 seconds and SW 2 ft at 14 seconds.

WED
SE wind around 5 kt, veering to SW around 5 kt in the afternoon. Seas 5 to 6 ft. Wave Detail: W 4 ft at 8 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 4 to 5 ft. Wave Detail: W 3 ft at 7 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 4 to 5 ft. Wave Detail: NW 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 8 seconds, W 4 ft at 11 seconds and SW 2 ft at 15 seconds.

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

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

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

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

PZZ153-182145
Coastal Waters From James Island To Point Grenville Out 10 Nm
134 AM PDT Tue Aug 18 2026

TODAY
SW wind around 5 kt, veering to W late. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds, SW 2 ft at 15 seconds and W 2 ft at 15 seconds. Patchy dense fog early this morning.

TONIGHT
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, veering to SW around 5 kt in the afternoon. Seas 5 to 6 ft. Wave Detail: W 5 ft at 8 seconds, W 5 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: W 4 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 5 ft. Wave Detail: W 4 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 5 ft at 9 seconds and SW 2 ft at 15 seconds.

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

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

SAT
S wind around 5 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 8 seconds.

SAT NIGHT
NW wind around 5 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 8 seconds.

PZZ156-182145
Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm
134 AM PDT Tue Aug 18 2026

TODAY
W wind around 5 kt, rising to 5 to 10 kt late. Seas 4 to 6 ft. Wave Detail: W 5 ft at 7 seconds, SW 2 ft at 15 seconds and W 2 ft at 15 seconds. Patchy dense fog early this morning.

TONIGHT
NW wind 5 to 10 kt. Seas 4 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 5 to 6 ft. Wave Detail: W 5 ft at 8 seconds and W 3 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 around 5 kt in the afternoon. Seas 4 to 5 ft. Wave Detail: NW 4 ft at 8 seconds and W 5 ft at 11 seconds.

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

FRI
S wind around 5 kt, rising to 5 to 10 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: W 4 ft at 10 seconds.

FRI NIGHT
S wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 8 seconds and W 2 ft at 10 seconds.

SAT
SW wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 8 seconds.

SAT NIGHT
NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 8 seconds.

PZZ170-182145
Coastal Waters From Cape Flattery To James Island 10 To 60 Nm
134 AM PDT Tue Aug 18 2026

TODAY
NW wind 10 to 15 kt. Seas 5 to 8 ft. Wave Detail: NW 7 ft at 7 seconds, W 3 ft at 13 seconds and SW 2 ft at 15 seconds.

TONIGHT
NW wind 10 to 15 kt, becoming W 5 to 10 kt after midnight. Seas 5 to 7 ft. Wave Detail: N 2 ft at 4 seconds, NW 6 ft at 7 seconds and W 3 ft at 12 seconds.

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

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

THU
N wind around 5 kt, backing to SW around 5 kt in the afternoon. Seas 5 to 6 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 4 to 5 ft. Wave Detail: W 5 ft at 8 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: W 4 ft at 9 seconds and S 2 ft at 15 seconds.

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

SAT
SW wind 5 to 10 kt. Seas around 4 ft. Wave Detail: W 4 ft at 8 seconds and S 2 ft at 14 seconds.

SAT NIGHT
NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: NW 2 ft at 3 seconds, W 4 ft at 9 seconds and S 2 ft at 14 seconds.

PZZ173-182145
Coastal Waters From James Island To Point Grenville 10 To 60 Nm
134 AM PDT Tue Aug 18 2026

TODAY
NW wind 15 to 20 kt, easing to 10 to 15 kt this afternoon. Seas 6 to 9 ft. Wave Detail: N 7 ft at 6 seconds, W 3 ft at 15 seconds and SW 2 ft at 15 seconds.

TONIGHT
NW wind 10 to 15 kt. Seas 6 to 7 ft. Wave Detail: NW 6 ft at 6 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 8 seconds, W 6 ft at 12 seconds and SW 2 ft at 14 seconds.

WED NIGHT
NW wind 10 to 15 kt. Seas 6 to 8 ft. Wave Detail: NW 6 ft at 7 seconds, W 6 ft at 12 seconds and SW 2 ft at 15 seconds.

THU
NW wind 5 to 10 kt. Seas 5 to 7 ft. Wave Detail: NW 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 5 to 10 kt. Seas around 5 ft. Wave Detail: W 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 10 seconds and SW 2 ft at 14 seconds.

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

SAT NIGHT
NW wind 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: N 2 ft at 4 seconds, W 4 ft at 8 seconds and SW 2 ft at 14 seconds.

PZZ176-182145
Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm
134 AM PDT Tue Aug 18 2026

TODAY
NW wind 10 to 15 kt. Seas 5 to 8 ft. Wave Detail: NW 7 ft at 7 seconds, W 3 ft at 14 seconds and SW 2 ft at 15 seconds.

TONIGHT
NW wind 10 to 15 kt. Seas 6 to 7 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 7 ft. Wave Detail: NW 6 ft at 8 seconds, W 6 ft at 12 seconds and SW 2 ft at 14 seconds.

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

THU
NW wind 5 to 10 kt. Seas 5 to 7 ft. Wave Detail: NW 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: NW 5 ft at 8 seconds, W 5 ft at 11 seconds and SW 2 ft at 15 seconds.

FRI
SW wind 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: NW 4 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.

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

SAT NIGHT
NW wind around 10 kt. Seas 4 to 5 ft. Wave Detail: NW 5 ft at 7 seconds and SW 2 ft at 14 seconds.

PZZ130-182145
West Entrance U.S. Waters Strait Of Juan De Fuca
134 AM PDT Tue Aug 18 2026

TODAY
W wind around 5 kt, rising to 5 to 10 kt late. Seas 3 to 4 ft. Wave Detail: W 4 ft at 8 seconds and W 2 ft at 14 seconds.

TONIGHT
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
W wind around 5 kt. Seas 3 to 4 ft. Wave Detail: W 4 ft at 8 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
N wind around 5 kt, backing to NW in the afternoon. Seas 3 to 4 ft. Wave Detail: W 4 ft at 11 seconds.

THU NIGHT
W wind around 5 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 3 ft at 9 seconds.

FRI NIGHT
W wind 5 to 10 kt. Seas around 3 ft. Wave Detail: W 3 ft at 8 seconds.

SAT
SW wind 5 to 10 kt. Seas around 3 ft. Wave Detail: W 3 ft at 8 seconds.

SAT NIGHT
W wind 5 to 10 kt. Seas around 3 ft. Wave Detail: W 3 ft at 8 seconds.

PZZ131-182145
Central U.S. Waters Strait Of Juan De Fuca
134 AM PDT Tue Aug 18 2026

TODAY
W wind 5 to 10 kt, easing to around 5 kt early this afternoon, rising to 5 to 10 kt late. Waves around 2 ft or less.

TONIGHT
W wind 10 to 15 kt. Waves around 3 ft.

WED
NW wind around 5 kt. 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. Waves 3 to 4 ft. A chance of rain in the evening.

SAT
W wind 10 to 15 kt, easing to 5 to 10 kt in the afternoon. Waves around 3 ft in the morning, then around 2 ft or less.

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

PZZ132-182145
East Entrance U.S. Waters Strait Of Juan De Fuca
134 AM PDT Tue Aug 18 2026

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

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

WED
W wind around 5 kt. 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 around 5 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. Waves around 3 ft. A chance of rain in the evening.

SAT
SW wind 5 to 10 kt. Waves around 3 ft in the morning, then around 2 ft or less.

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

PZZ134-182145
Admiralty Inlet
134 AM PDT Tue Aug 18 2026

TODAY
SE wind around 5 kt, veering to NW around 5 kt late. Waves around 2 ft or less. Patchy dense fog early this morning.

TONIGHT
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, veering to NW 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
NW wind around 5 kt, rising to 5 to 10 kt in the afternoon. Waves around 2 ft or less.

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

FRI
S wind around 5 kt, veering to NW around 5 kt 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.

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

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

PZZ133-182145
Northern Inland Waters Including The San Juan Islands
134 AM PDT Tue Aug 18 2026

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

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

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

THU NIGHT
W wind around 5 kt in the evening, becoming light and variable. 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. A chance of rain in the evening.

SAT
S wind 10 to 15 kt, easing to 5 to 10 kt in the afternoon. Waves around 2 ft or less.

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

PZZ135-182145
Puget Sound and Hood Canal
134 AM PDT Tue Aug 18 2026

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

TONIGHT
W wind 5 to 10 kt, becoming S after midnight. Waves around 2 ft or less.

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

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

FRI
SW wind around 5 kt, rising to 5 to 10 kt in the afternoon. Waves around 2 ft or less.

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

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

SAT NIGHT
SW wind 5 to 10 kt, easing to around 5 kt after midnight. Waves around 2 ft or less.

PZZ110-182145
Grays Harbor Bar
134 AM PDT Tue Aug 18 2026

Combined seas 3 to 5 ft. Bar conditions light. Maximum ebb currents will occur around 900 AM Tuesday, 930 PM Tuesday, and 945 AM Wednesday.