National Weather Service Marine Forecast FZAK52 PAFC

FZAK52 PAFC 202251
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
251 PM AKDT Thu Aug 20 2026

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

Wind forecasts reflect the predominant speed and direction expected. Sea forecasts represent an average of the highest one-third of the combined wind wave and swell height.

PKZ199-211200
251 PM AKDT Thu Aug 20 2026 .SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 1000 mb low Fri morning moves to 63N 172W, then to the Norton Sound Fri afternoon at 998 mb, and then inland by Sat morning. Its front moves across the Bering through Sat morning.

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PKZ750-211200
Sitkinak to Castle Cape out to 15 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY NIGHT

TONIGHT
Variable wind 10 kt. Seas 3 ft.

FRI
SW wind 15 kt. Seas 3 ft.

FRI NIGHT
SW wind 25 kt. Seas 5 ft. Rain.

SAT AND SAT NIGHT
NW wind 25 kt. Seas 5 ft.

SUN
NW wind 20 kt. Seas 5 ft.

MON
Variable wind 10 kt. Seas 3 ft.

TUE
W wind 15 kt. Seas 4 ft.

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PKZ751-211200
Sitkinak to Castle Cape from 15 to 100 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY NIGHT

TONIGHT
W wind 15 kt. Seas 4 ft.

FRI
SW wind 15 kt. Seas 4 ft.

FRI NIGHT
SW wind 25 kt. Seas 7 ft. Rain.

SAT AND SAT NIGHT
NW wind 25 kt. Seas 7 ft.

SUN
NW wind 25 kt. Seas 7 ft.

MON THROUGH TUE
W wind 15 kt. Seas 5 ft.

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PKZ752-211200
Castle Cape to Cape Tolstoi out to 15 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
NW wind 15 kt. Seas 3 ft.

FRI
SW wind 15 kt. Seas 3 ft.

FRI NIGHT
SW wind 20 kt. Seas 4 ft.

SAT AND SAT NIGHT
NW wind 20 kt. Seas 3 ft.

SUN
W wind 15 kt. Seas 2 ft.

MON THROUGH TUE
Variable wind 10 kt. Seas 4 ft.

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PKZ753-211200
Castle Cape to Cape Tolstoi from 15 to 100 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY NIGHT

TONIGHT
W wind 15 kt. Seas 4 ft.

FRI
Variable wind 10 kt becoming SW 20 kt in the afternoon. Seas 4 ft.

FRI NIGHT
SW wind 25 kt. Seas 7 ft. Rain.

SAT AND SAT NIGHT
NW wind 20 kt. Seas 7 ft.

SUN THROUGH TUE
W wind 15 kt. Seas 6 ft.

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PKZ754-211200
Cape Tolstoi to Cape Sarichef out to 15 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY

TONIGHT
Variable wind 10 kt. Seas 3 ft.

FRI
SW wind 15 kt increasing to 25 kt in the afternoon. Seas 5 ft. Rain.

FRI NIGHT
SW wind 20 kt. Seas 5 ft.

SAT AND SAT NIGHT
NW wind 20 kt. Seas 4 ft.

SUN
Variable wind 10 kt. Seas 3 ft.

MON
SW wind 15 kt. Seas 5 ft.

TUE
Variable wind 10 kt. Seas 6 ft.

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PKZ755-211200
Cape Tolstoi to Unalga Pass from 15 to 100 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT

TONIGHT
W wind 15 kt. Seas 4 ft.

FRI
SW wind 25 kt. Seas 6 ft.

FRI NIGHT
SW wind 25 kt. Seas 7 ft.

SAT AND SAT NIGHT
NW wind 20 kt. Seas 6 ft.

SUN THROUGH TUE
W wind 15 kt. Seas 6 ft.

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PKZ756-211200
Port Heiden to Nelson Lagoon out to 15 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
Variable wind 10 kt. Seas 2 ft.

FRI
Variable wind 10 kt becoming S 20 kt in the afternoon. Seas 3 ft.

FRI NIGHT
S wind 20 kt. Seas 5 ft. Rain.

SAT AND SAT NIGHT
NW wind 20 kt. Seas 5 ft.

SUN
Variable wind 10 kt. Seas 5 ft.

MON THROUGH TUE
W wind 15 kt. Seas 6 ft.

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PKZ757-211200
Port Heiden to Nelson Lagoon from 15 to 60 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
Variable wind 10 kt. Seas 2 ft.

FRI
S wind 20 kt. Seas 4 ft. Rain.

FRI NIGHT
S wind 20 kt. Seas 6 ft. Rain.

SAT AND SAT NIGHT
NW wind 20 kt. Seas 7 ft.

SUN
W wind 15 kt. Seas 5 ft.

MON
SW wind 20 kt. Seas 6 ft.

TUE
W wind 15 kt. Seas 6 ft.

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PKZ758-211200
Nelson Lagoon to Cape Sarichef out to 15 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
SW wind 15 kt. Seas 2 ft.

FRI
S wind 20 kt. Seas 3 ft. Rain.

FRI NIGHT
SW wind 20 kt. Seas 6 ft.

SAT AND SAT NIGHT
NW wind 15 kt. Seas 5 ft.

SUN THROUGH TUE
SW wind 15 kt. Seas 5 ft.

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PKZ759-211200
Nelson Lagoon to Unalga Pass 15 to 70 nm
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY

TONIGHT
W wind 15 kt. Seas 3 ft.

FRI
S wind 25 kt. Seas 7 ft. Rain.

FRI NIGHT
W wind 20 kt. Seas 7 ft.

SAT
NW wind 20 kt. Seas 6 ft.

SAT NIGHT
NW wind 15 kt. Seas 6 ft.

SUN THROUGH MON
SW wind 20 kt. Seas 6 ft.

TUE
W wind 15 kt. Seas 6 ft.

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PKZ768-211200
Unimak Pass
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT

TONIGHT
W wind 15 kt. Seas 3 ft.

FRI
S wind 25 kt. Seas 7 ft.

FRI NIGHT
W wind 25 kt. Seas 6 ft.

SAT AND SAT NIGHT
N wind 20 kt. Seas 5 ft.

SUN THROUGH MON
SW wind 15 kt. Seas 5 ft.

TUE
Variable wind 10 kt. Seas 7 ft.

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PKZ770-211200
Unalga Pass to Nikolski Bering Side out to 15 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY

TONIGHT
W wind 15 kt. Seas 2 ft.

FRI
SW wind 25 kt. Seas 5 ft. Rain.

FRI NIGHT
W wind 20 kt. Seas 5 ft.

SAT
N wind 15 kt. Seas 4 ft.

SAT NIGHT
Variable wind 10 kt. Seas 4 ft.

SUN THROUGH MON
SW wind 20 kt. Seas 5 ft.

TUE
SW wind 15 kt. Seas 5 ft.

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PKZ772-211200
Unalga Pass to Nikolski Bering Side from 15 to 85 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY

TONIGHT
SW wind 20 kt. Seas 4 ft.

FRI
S wind 25 kt. Seas 7 ft. Rain.

FRI NIGHT
W wind 20 kt. Seas 7 ft.

SAT
N wind 15 kt. Seas 5 ft.

SAT NIGHT
Variable wind 10 kt. Seas 4 ft.

SUN THROUGH MON
SW wind 20 kt. Seas 6 ft.

TUE
SW wind 15 kt. Seas 6 ft.

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PKZ771-211200
Unalaska Bay
251 PM AKDT Thu Aug 20 2026

TONIGHT
W wind 10 kt in the evening becoming variable less than 10 kt. Seas 2 ft.

FRI
S wind 10 kt becoming SW in the afternoon. Seas 2 ft. Rain.

FRI NIGHT
W wind 15 kt. Seas 2 ft.

SAT
NW wind 15 kt. Seas 4 ft.

SAT NIGHT
NW wind 10 kt. Seas 3 ft.

SUN THROUGH TUE
Variable wind less than 10 kt. Seas 2 ft.

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PKZ773-211200
Unalga Pass to Nikolski Pacific Side out to 15 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY

TONIGHT
SW wind 15 kt. Seas 3 ft.

FRI
SW wind 25 kt. Seas 5 ft. Rain.

FRI NIGHT
W wind 20 kt. Seas 5 ft.

SAT
NW wind 15 kt. Seas 4 ft.

SAT NIGHT
Variable wind 10 kt. Seas 3 ft.

SUN
SW wind 15 kt. Seas 4 ft.

MON
SW wind 20 kt. Seas 6 ft.

TUE
W wind 15 kt. Seas 7 ft.

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PKZ774-211200
Unalga Pass to Nikolski Pacific Side from 15 to 85 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT

TONIGHT
W wind 15 kt. Seas 3 ft.

FRI
SW wind 25 kt. Seas 6 ft.

FRI NIGHT
W wind 25 kt. Seas 6 ft.

SAT AND SAT NIGHT
NW wind 15 kt. Seas 5 ft.

SUN THROUGH TUE
W wind 15 kt. Seas 6 ft.

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PKZ775-211200
Nikolski to Seguam Bering Side out to 15 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
SW wind 20 kt. Seas 4 ft. Patchy fog.

FRI
SW wind 20 kt. Seas 7 ft.

FRI NIGHT
W wind 20 kt. Seas 7 ft.

SAT
Variable wind 10 kt. Seas 5 ft.

SAT NIGHT
Variable wind 10 kt. Seas 4 ft.

SUN THROUGH MON
SW wind 20 kt. Seas 6 ft.

TUE
SW wind 15 kt. Seas 6 ft.

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PKZ776-211200
Nikolski to Seguam Bering Side from 15 to 85 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY THROUGH FRIDAY

TONIGHT
SW wind 25 kt. Seas 5 ft. Patchy fog.

FRI
SW wind 25 kt. Seas 8 ft.

FRI NIGHT
W wind 20 kt. Seas 7 ft.

SAT
Variable wind 10 kt. Seas 5 ft.

SAT NIGHT
S wind 15 kt. Seas 4 ft.

SUN THROUGH MON
SW wind 20 kt. Seas 8 ft.

TUE
SW wind 15 kt. Seas 6 ft.

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PKZ777-211200
Nikolski to Seguam Pacfic Side out to 15 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
SW wind 20 kt. Seas 4 ft. Patchy fog.

FRI
SW wind 20 kt. Seas 5 ft.

FRI NIGHT
W wind 20 kt. Seas 6 ft.

SAT
NW wind 15 kt. Seas 5 ft.

SAT NIGHT
Variable wind 10 kt. Seas 4 ft.

SUN THROUGH MON
SW wind 20 kt. Seas 7 ft.

TUE
SW wind 15 kt. Seas 7 ft.

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PKZ778-211200
Nikolski to Seguam Pacific Side from 15 to 75 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
SW wind 20 kt. Seas 4 ft. Patchy fog.

FRI
SW wind 20 kt. Seas 6 ft.

FRI NIGHT
W wind 20 kt. Seas 7 ft.

SAT
NW wind 15 kt. Seas 5 ft.

SAT NIGHT
Variable wind 10 kt. Seas 4 ft.

SUN THROUGH MON
SW wind 20 kt. Seas 7 ft.

TUE
SW wind 15 kt. Seas 7 ft.

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PKZ780-211200
Seguam to Adak Bering Side out to 15 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY

TONIGHT
SW wind 20 kt. Seas 3 ft. Patchy fog.

FRI
W wind 25 kt. Seas 6 ft.

FRI NIGHT
W wind 20 kt. Seas 6 ft.

SAT
Variable wind 10 kt. Seas 5 ft.

SAT NIGHT
SW wind 20 kt. Seas 4 ft.

SUN
SW wind 25 kt. Seas 5 ft.

MON
SW wind 20 kt. Seas 5 ft.

TUE
SW wind 15 kt. Seas 4 ft.

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PKZ781-211200
Seguam to Adak Bering Side from 15 to 85 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY THROUGH FRIDAY

TONIGHT
SW wind 25 kt. Seas 6 ft. Patchy fog.

FRI
W wind 25 kt. Seas 8 ft.

FRI NIGHT
W wind 20 kt. Seas 7 ft.

SAT
Variable wind 10 kt. Seas 5 ft.

SAT NIGHT
S wind 25 kt. Seas 5 ft.

SUN
SW wind 25 kt. Seas 8 ft.

MON
SW wind 20 kt. Seas 7 ft.

TUE
SW wind 15 kt. Seas 4 ft.

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PKZ782-211200
Seguam to Adak Pacific Side out to 15 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY

TONIGHT
SW wind 20 kt. Seas 5 ft. Patchy fog.

FRI
W wind 25 kt. Seas 5 ft.

FRI NIGHT
W wind 20 kt. Seas 5 ft.

SAT
Variable wind 10 kt. Seas 4 ft.

SAT NIGHT
SW wind 20 kt. Seas 3 ft.

SUN
SW wind 25 kt. Seas 7 ft.

MON
SW wind 20 kt. Seas 7 ft.

TUE
SW wind 15 kt. Seas 7 ft.

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PKZ783-211200
Seguam to Adak Pacific Side from 15 to 75 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT

TONIGHT
SW wind 20 kt. Seas 5 ft. Patchy fog.

FRI
W wind 25 kt. Seas 6 ft.

FRI NIGHT
W wind 25 kt. Seas 7 ft.

SAT
W wind 15 kt. Seas 5 ft.

SAT NIGHT
SW wind 20 kt. Seas 4 ft.

SUN
SW wind 25 kt. Seas 8 ft.

MON
SW wind 20 kt. Seas 8 ft.

TUE
SW wind 15 kt. Seas 7 ft.

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PKZ784-211200
Adak to Kiska Bering Side
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT

TONIGHT
SW wind 25 kt. Seas 8 ft. Patchy fog.

FRI
W wind 25 kt. Seas 9 ft.

FRI NIGHT
W wind 20 kt. Seas 8 ft.

SAT
S wind 20 kt. Seas 5 ft.

SAT NIGHT
S wind 30 kt. Seas 7 ft.

SUN
SW wind 30 kt. Seas 9 ft.

MON
SW wind 20 kt. Seas 6 ft.

TUE
SW wind 15 kt. Seas 5 ft.

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PKZ785-211200
Adak to Kiska Pacific Side
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY THROUGH FRIDAY

TONIGHT
W wind 25 kt. Seas 6 ft. Patchy fog.

FRI
W wind 25 kt. Seas 6 ft.

FRI NIGHT
W wind 20 kt. Seas 6 ft.

SAT
SW wind 25 kt. Seas 5 ft.

SAT NIGHT
S wind 30 kt. Seas 9 ft.

SUN
SW wind 30 kt. Seas 10 ft.

MON
SW wind 20 kt. Seas 8 ft.

TUE
S wind 15 kt. Seas 8 ft.

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PKZ786-211200
Kiska to Attu Bering Side
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY THROUGH FRIDAY

TONIGHT
SW wind 30 kt. Seas 11 ft. Patchy fog.

FRI
W wind 25 kt. Seas 10 ft.

FRI NIGHT
SW wind 15 kt. Seas 6 ft. Isolated thunderstorms after midnight.

SAT
S wind 20 kt. Seas 5 ft.

SAT NIGHT
S wind 30 kt. Seas 8 ft.

SUN
SW wind 25 kt. Seas 9 ft.

MON THROUGH TUE
S wind 15 kt. Seas 6 ft.

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PKZ787-211200
Kiska to Attu Pacific Side
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY THROUGH FRIDAY

TONIGHT
SW wind 25 kt. Seas 9 ft. Patchy fog.

FRI
SW wind 25 kt. Seas 8 ft.

FRI NIGHT
S wind 20 kt. Seas 6 ft. Rain showers. Isolated thunderstorms after midnight.

SAT
S wind 25 kt. Seas 7 ft.

SAT NIGHT
S wind 30 kt. Seas 10 ft.

SUN
SW wind 25 kt. Seas 10 ft.

MON
SW wind 15 kt. Seas 7 ft.

TUE
S wind 15 kt. Seas 8 ft.

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PKZ766-211200
Pribilof Islands Nearshore Waters
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY THROUGH FRIDAY

TONIGHT
SW wind 15 kt becoming S 25 kt after midnight. Seas 3 ft building to 6 ft after midnight. Rain.

FRI
SW wind 25 kt. Seas 7 ft. Rain.

FRI NIGHT
NW wind 20 kt. Seas 6 ft.

SAT
NW wind 15 kt. Seas 6 ft.

SAT NIGHT
S wind 15 kt. Seas 5 ft.

SUN
S wind 30 kt. Seas 9 ft.

MON
SW wind 25 kt. Seas 9 ft.

TUE
SW wind 15 kt. Seas 7 ft.

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PKZ760-211200
Bristol Bay greater than 15 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
W wind 15 kt. Seas 2 ft.

FRI
S wind 20 kt. Seas 3 ft.

FRI NIGHT
S wind 20 kt. Seas 5 ft. Rain.

SAT
NW wind 20 kt. Seas 6 ft.

SAT NIGHT
NW wind 25 kt. Seas 7 ft.

SUN
W wind 15 kt. Seas 4 ft.

MON THROUGH TUE
W wind 15 kt. Seas 6 ft.

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PKZ761-211200
Bristol Bay from Port Heiden to Cape Chichagof out to 15 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
W wind 10 kt increasing to 15 kt after midnight. Seas 2 ft.

FRI
SW wind 15 kt. Seas 2 ft.

FRI NIGHT
SW wind 20 kt. Seas 4 ft. Rain.

SAT AND SAT NIGHT
NW wind 20 kt. Seas 6 ft.

SUN
W wind 10 kt. Seas 5 ft.

MON THROUGH TUE
W wind 15 kt. Seas 6 ft.

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PKZ762-211200
Bristol Bay from Cape Chichagof to Cape Pierce out to 15 NM
251 PM AKDT Thu Aug 20 2026

TONIGHT
W wind 15 kt. Seas 2 ft.

FRI
S wind 20 kt. Seas 3 ft.

FRI NIGHT
S wind 20 kt. Seas 4 ft. Rain.

SAT AND SAT NIGHT
NW wind 20 kt. Seas 4 ft.

SUN
W wind 15 kt. Seas 2 ft.

MON THROUGH TUE
W wind 15 kt. Seas 5 ft.

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PKZ763-211200
Kuskokwim Delta and Etolin Strait out to 15 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT

TONIGHT
SW wind 15 kt. Seas 2 ft.

FRI
S wind 30 kt. Seas 5 ft. Rain.

FRI NIGHT
SW wind 25 kt. Seas 5 ft.

SAT
NW wind 25 kt. Seas 5 ft.

SAT NIGHT
N wind 20 kt. Seas 4 ft.

SUN THROUGH MON
SW wind 30 kt. Seas 6 ft.

TUE
SW wind 20 kt. Seas 6 ft.

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PKZ764-211200
Kuskokwim Delta from 15 to 80 NM
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT

TONIGHT
SW wind 20 kt. Seas 3 ft.

FRI
S wind 30 kt. Seas 7 ft. Rain.

FRI NIGHT
SW wind 25 kt. Seas 7 ft.

SAT
NW wind 25 kt. Seas 7 ft.

SAT NIGHT
NW wind 20 kt. Seas 7 ft.

SUN THROUGH MON
SW wind 25 kt. Seas 9 ft.

TUE
W wind 20 kt. Seas 6 ft.

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PKZ765-211200
North and West of Nunivak Island
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT

TONIGHT
SW wind 20 kt. Seas 4 ft. Rain.

FRI
S wind 25 kt. Seas 7 ft. Rain.

FRI NIGHT
NW wind 25 kt. Seas 8 ft.

SAT
NW wind 25 kt. Seas 8 ft.

SAT NIGHT
NE wind 15 kt. Seas 6 ft.

SUN
S wind 30 kt. Seas 10 ft.

MON
SW wind 25 kt. Seas 10 ft.

TUE
SW wind 20 kt. Seas 7 ft.

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PKZ767-211200
Saint Matthew Island Waters
251 PM AKDT Thu Aug 20 2026

SMALL CRAFT ADVISORY TONIGHT

TONIGHT
SW wind 25 kt. Seas 5 ft. Rain.

FRI
NW wind 20 kt. Seas 6 ft.

FRI NIGHT
NW wind 20 kt. Seas 7 ft.

SAT
N wind 20 kt. Seas 6 ft.

SAT NIGHT
S wind 30 kt. Seas 7 ft.

SUN
S wind 30 kt. Seas 10 ft.

MON
SW wind 25 kt. Seas 10 ft.

TUE
SW wind 20 kt. Seas 7 ft.