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Anchorage, AK Local Forecast Office

34NM ESE Seguam Island AK

Marine Point Forecast

[NOTICE]

Thursday
High: 40 °F
N 30kt⇓
15ft

Small Craft Advisory
Thursday Night
Low: 39 °F
N 20kt
10ft

Small Craft Advisory
Friday
High: 40 °F
Light Wind
5-7ft
Friday Night
Low: 40 °F
NW 15kt
8ft
Saturday
High: 41 °F
NNW 15kt
9-10ft
Saturday Night
Low: 40 °F
⇑ENE 30kt
9-10ft
Sunday
High: 36 °F
NNE 30kt
15ft
Sunday Night
Low: 33 °F
N 25kt
19ft
Monday
High: 36 °F
N 25kt
10ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 8:11 pm AKST Dec 3, 2025
Forecast Valid: 1am AKST Dec 4, 2025-6pm AKST Dec 10, 2025

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY THROUGH THURSDAY NIGHT...

Synopsis: A 990 mb low roughly 90 nm S of Unalaska slowly weakens south of the Eastern Aleutians and dissipates through Fri morning. A broad front overspreads the Western Aleutians Thu afternoon with a developing 998 mb low 250 nm SE of Adak Fri afternoon.

Thursday

N wind 25 to 30 kt decreasing to 15 to 20 kt in the afternoon. Scattered showers, mainly after 3pm. Seas 15 ft subsiding to 11 ft.

Thursday Night

N wind 10 to 20 kt. Scattered showers after 9pm. Seas 10 ft subsiding to 7 ft.

Friday

Variable winds 5 kt or less. Scattered showers, mainly after noon. Seas 5 to 7 ft.

Friday Night

NW wind 5 to 15 kt. Scattered showers before midnight. Seas 5 ft building to 8 ft.

Saturday

NNW wind 10 to 15 kt becoming NNE in the afternoon. Mostly sunny. Seas 9 to 10 ft.

Saturday Night

ENE wind 15 to 20 kt increasing to 25 to 30 kt after midnight. A chance of rain and snow after 9pm. Seas 9 to 10 ft.

Sunday

NNE wind 25 to 30 kt. A chance of rain and snow. Seas 11 ft building to 15 ft.

Sunday Night

N wind around 25 kt. Rain and snow, mainly after 3am. Seas 19 ft subsiding to 10 ft.

Monday

N wind around 25 kt. Rain and snow. Seas around 10 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.