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Anchorage, AK Local Forecast Office

20NM SSE Shumagin Islands AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 43 °F
NNW 10kt
2ft
Tonight
Low: 33 °F
NNW 20kt
2-4ft
Saturday
High: 36 °F
⇑NW 35kt
3-5ft

Gale Warning
Saturday Night
Low: 23 °F
N 30kt⇓
5ft

Small Craft Advisory
Sunday
High: 28 °F
N 10kt
2-3ft
Sunday Night
Low: 28 °F
N 20kt
2ft
Monday
High: 34 °F
N 15kt
2-4ft
Monday Night
Low: 31 °F
⇑NNW 30kt
4ft
Tuesday
High: 35 °F
NNW 30kt
4-6ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:20 pm AKST Dec 5, 2025
Forecast Valid: 4pm AKST Dec 5, 2025-6pm AKST Dec 11, 2025

View Nearby Observations

Detailed Forecast

...GALE WARNING SATURDAY AND SATURDAY NIGHT...

Synopsis: A 1000 mb low 130 nm SW of Atka exits south to the North Pacific through Sat morning. A 982 mb North Pacific low 370 nm W of Shemya Sat morning moves to 310 nm SE of Atka at 978 mb Sun afternoon. Strong northeasterly gale-force winds continue along the coast with storm-force along the Kuskokwim Delta Coast through the weekend. Extreme Freezing Spray continues along the Kuskokwim Delta Coast through the weekend.

This Afternoon

NNW wind around 10 kt. Scattered showers. Seas around 2 ft.

Tonight

NNW wind 15 to 20 kt, with gusts as high as 25 kt. Scattered showers before 9pm. Seas 2 to 4 ft.

Saturday

NW wind 20 to 25 kt increasing to 30 to 35 kt in the afternoon. Winds could gust as high as 40 kt. Scattered snow showers, mainly between noon and 3pm. Widespread freezing spray after 3pm. Seas 3 to 5 ft.

Saturday Night

N wind 20 to 30 kt decreasing to 10 to 20 kt after midnight. Scattered snow showers before midnight. Widespread freezing spray before midnight. Seas 5 ft subsiding to 2 ft.

Sunday

N wind around 10 kt. Mostly sunny. Seas 2 to 3 ft.

Sunday Night

N wind 15 to 20 kt. Mostly cloudy. Seas around 2 ft.

Monday

N wind around 15 kt. Mostly cloudy. Seas 2 to 4 ft.

Monday Night

NNW wind 15 to 20 kt increasing to 25 to 30 kt after midnight. A chance of rain and snow showers between 9pm and 3am, then a chance of snow showers after 3am. Seas around 4 ft.

Tuesday

NNW wind around 30 kt. A chance of snow before 9am, then a chance of rain and snow. Seas 4 to 6 ft.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.