Coastal Waters Forecast
Issued by NWS
Issued by NWS
573 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. $$ PKZ750-211200- Sitkinak to Castle Cape out to 15 NM- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY NIGHT... .TONIGHT...Variable wind 10 kt. Seas 3 ft. .FRI...SW wind 15 kt. Seas 3 ft. .FRI NIGHT...SW wind 25 kt. Seas 5 ft. Rain. .SAT AND SAT NIGHT...NW wind 25 kt. Seas 5 ft. .SUN...NW wind 20 kt. Seas 5 ft. .MON...Variable wind 10 kt. Seas 3 ft. .TUE...W wind 15 kt. Seas 4 ft. $$ 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. $$ PKZ752-211200- Castle Cape to Cape Tolstoi out to 15 NM- 251 PM AKDT Thu Aug 20 2026 .TONIGHT...NW wind 15 kt. Seas 3 ft. .FRI...SW wind 15 kt. Seas 3 ft. .FRI NIGHT...SW wind 20 kt. Seas 4 ft. .SAT AND SAT NIGHT...NW wind 20 kt. Seas 3 ft. .SUN...W wind 15 kt. Seas 2 ft. .MON THROUGH TUE...Variable wind 10 kt. Seas 4 ft. $$ 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. $$ PKZ754-211200- Cape Tolstoi to Cape Sarichef out to 15 NM- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY... .TONIGHT...Variable wind 10 kt. Seas 3 ft. .FRI...SW wind 15 kt increasing to 25 kt in the afternoon. Seas 5 ft. Rain. .FRI NIGHT...SW wind 20 kt. Seas 5 ft. .SAT AND SAT NIGHT...NW wind 20 kt. Seas 4 ft. .SUN...Variable wind 10 kt. Seas 3 ft. .MON...SW wind 15 kt. Seas 5 ft. .TUE...Variable wind 10 kt. Seas 6 ft. $$ 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. $$ PKZ756-211200- Port Heiden to Nelson Lagoon out to 15 NM- 251 PM AKDT Thu Aug 20 2026 .TONIGHT...Variable wind 10 kt. Seas 2 ft. .FRI...Variable wind 10 kt becoming S 20 kt in the afternoon. Seas 3 ft. .FRI NIGHT...S wind 20 kt. Seas 5 ft. Rain. .SAT AND SAT NIGHT...NW wind 20 kt. Seas 5 ft. .SUN...Variable wind 10 kt. Seas 5 ft. .MON THROUGH TUE...W wind 15 kt. Seas 6 ft. $$ 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. $$ PKZ758-211200- Nelson Lagoon to Cape Sarichef out to 15 NM- 251 PM AKDT Thu Aug 20 2026 .TONIGHT...SW wind 15 kt. Seas 2 ft. .FRI...S wind 20 kt. Seas 3 ft. Rain. .FRI NIGHT...SW wind 20 kt. Seas 6 ft. .SAT AND SAT NIGHT...NW wind 15 kt. Seas 5 ft. .SUN THROUGH TUE...SW wind 15 kt. Seas 5 ft. $$ 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. $$ PKZ768-211200- Unimak Pass- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT... .TONIGHT...W wind 15 kt. Seas 3 ft. .FRI...S wind 25 kt. Seas 7 ft. .FRI NIGHT...W wind 25 kt. Seas 6 ft. .SAT AND SAT NIGHT...N wind 20 kt. Seas 5 ft. .SUN THROUGH MON...SW wind 15 kt. Seas 5 ft. .TUE...Variable wind 10 kt. Seas 7 ft. $$ 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. $$ PKZ772-211200- Unalga Pass to Nikolski Bering Side from 15 to 85 NM- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY... .TONIGHT...SW wind 20 kt. Seas 4 ft. .FRI...S wind 25 kt. Seas 7 ft. Rain. .FRI NIGHT...W wind 20 kt. Seas 7 ft. .SAT...N wind 15 kt. Seas 5 ft. .SAT NIGHT...Variable wind 10 kt. Seas 4 ft. .SUN THROUGH MON...SW wind 20 kt. Seas 6 ft. .TUE...SW wind 15 kt. Seas 6 ft. $$ 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. $$ PKZ773-211200- Unalga Pass to Nikolski Pacific Side out to 15 NM- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY... .TONIGHT...SW wind 15 kt. Seas 3 ft. .FRI...SW wind 25 kt. Seas 5 ft. Rain. .FRI NIGHT...W wind 20 kt. Seas 5 ft. .SAT...NW wind 15 kt. Seas 4 ft. .SAT NIGHT...Variable wind 10 kt. Seas 3 ft. .SUN...SW wind 15 kt. Seas 4 ft. .MON...SW wind 20 kt. Seas 6 ft. .TUE...W wind 15 kt. Seas 7 ft. $$ 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. $$ PKZ775-211200- Nikolski to Seguam Bering Side out to 15 NM- 251 PM AKDT Thu Aug 20 2026 .TONIGHT...SW wind 20 kt. Seas 4 ft. Patchy fog. .FRI...SW wind 20 kt. Seas 7 ft. .FRI NIGHT...W wind 20 kt. Seas 7 ft. .SAT...Variable wind 10 kt. Seas 5 ft. .SAT NIGHT...Variable wind 10 kt. Seas 4 ft. .SUN THROUGH MON...SW wind 20 kt. Seas 6 ft. .TUE...SW wind 15 kt. Seas 6 ft. $$ 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. $$ PKZ777-211200- Nikolski to Seguam Pacfic Side out to 15 NM- 251 PM AKDT Thu Aug 20 2026 .TONIGHT...SW wind 20 kt. Seas 4 ft. Patchy fog. .FRI...SW wind 20 kt. Seas 5 ft. .FRI NIGHT...W wind 20 kt. Seas 6 ft. .SAT...NW wind 15 kt. Seas 5 ft. .SAT NIGHT...Variable wind 10 kt. Seas 4 ft. .SUN THROUGH MON...SW wind 20 kt. Seas 7 ft. .TUE...SW wind 15 kt. Seas 7 ft. $$ 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. $$ PKZ780-211200- Seguam to Adak Bering Side out to 15 NM- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY... .TONIGHT...SW wind 20 kt. Seas 3 ft. Patchy fog. .FRI...W wind 25 kt. Seas 6 ft. .FRI NIGHT...W wind 20 kt. Seas 6 ft. .SAT...Variable wind 10 kt. Seas 5 ft. .SAT NIGHT...SW wind 20 kt. Seas 4 ft. .SUN...SW wind 25 kt. Seas 5 ft. .MON...SW wind 20 kt. Seas 5 ft. .TUE...SW wind 15 kt. Seas 4 ft. $$ 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. $$ PKZ782-211200- Seguam to Adak Pacific Side out to 15 NM- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY... .TONIGHT...SW wind 20 kt. Seas 5 ft. Patchy fog. .FRI...W wind 25 kt. Seas 5 ft. .FRI NIGHT...W wind 20 kt. Seas 5 ft. .SAT...Variable wind 10 kt. Seas 4 ft. .SAT NIGHT...SW wind 20 kt. Seas 3 ft. .SUN...SW wind 25 kt. Seas 7 ft. .MON...SW wind 20 kt. Seas 7 ft. .TUE...SW wind 15 kt. Seas 7 ft. $$ 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. $$ PKZ784-211200- Adak to Kiska Bering Side- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT... .TONIGHT...SW wind 25 kt. Seas 8 ft. Patchy fog. .FRI...W wind 25 kt. Seas 9 ft. .FRI NIGHT...W wind 20 kt. Seas 8 ft. .SAT...S wind 20 kt. Seas 5 ft. .SAT NIGHT...S wind 30 kt. Seas 7 ft. .SUN...SW wind 30 kt. Seas 9 ft. .MON...SW wind 20 kt. Seas 6 ft. .TUE...SW wind 15 kt. Seas 5 ft. $$ 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. $$ PKZ786-211200- Kiska to Attu Bering Side- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY THROUGH FRIDAY... .TONIGHT...SW wind 30 kt. Seas 11 ft. Patchy fog. .FRI...W wind 25 kt. Seas 10 ft. .FRI NIGHT...SW wind 15 kt. Seas 6 ft. Isolated thunderstorms after midnight. .SAT...S wind 20 kt. Seas 5 ft. .SAT NIGHT...S wind 30 kt. Seas 8 ft. .SUN...SW wind 25 kt. Seas 9 ft. .MON THROUGH TUE...S wind 15 kt. Seas 6 ft. $$ 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. $$ PKZ766-211200- Pribilof Islands Nearshore Waters- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY THROUGH FRIDAY... .TONIGHT...SW wind 15 kt becoming S 25 kt after midnight. Seas 3 ft building to 6 ft after midnight. Rain. .FRI...SW wind 25 kt. Seas 7 ft. Rain. .FRI NIGHT...NW wind 20 kt. Seas 6 ft. .SAT...NW wind 15 kt. Seas 6 ft. .SAT NIGHT...S wind 15 kt. Seas 5 ft. .SUN...S wind 30 kt. Seas 9 ft. .MON...SW wind 25 kt. Seas 9 ft. .TUE...SW wind 15 kt. Seas 7 ft. $$ 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. $$ PKZ761-211200- Bristol Bay from Port Heiden to Cape Chichagof out to 15 NM- 251 PM AKDT Thu Aug 20 2026 .TONIGHT...W wind 10 kt increasing to 15 kt after midnight. Seas 2 ft. .FRI...SW wind 15 kt. Seas 2 ft. .FRI NIGHT...SW wind 20 kt. Seas 4 ft. Rain. .SAT AND SAT NIGHT...NW wind 20 kt. Seas 6 ft. .SUN...W wind 10 kt. Seas 5 ft. .MON THROUGH TUE...W wind 15 kt. Seas 6 ft. $$ 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. $$ PKZ763-211200- Kuskokwim Delta and Etolin Strait out to 15 NM- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT... .TONIGHT...SW wind 15 kt. Seas 2 ft. .FRI...S wind 30 kt. Seas 5 ft. Rain. .FRI NIGHT...SW wind 25 kt. Seas 5 ft. .SAT...NW wind 25 kt. Seas 5 ft. .SAT NIGHT...N wind 20 kt. Seas 4 ft. .SUN THROUGH MON...SW wind 30 kt. Seas 6 ft. .TUE...SW wind 20 kt. Seas 6 ft. $$ 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. $$ PKZ765-211200- North and West of Nunivak Island- 251 PM AKDT Thu Aug 20 2026 ...SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT... .TONIGHT...SW wind 20 kt. Seas 4 ft. Rain. .FRI...S wind 25 kt. Seas 7 ft. Rain. .FRI NIGHT...NW wind 25 kt. Seas 8 ft. .SAT...NW wind 25 kt. Seas 8 ft. .SAT NIGHT...NE wind 15 kt. Seas 6 ft. .SUN...S wind 30 kt. Seas 10 ft. .MON...SW wind 25 kt. Seas 10 ft. .TUE...SW wind 20 kt. Seas 7 ft. $$ 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. $$