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Anchorage, AK Local Forecast Office

39NM NW Seguam Island AK

Marine Point Forecast

[NOTICE]

Tonight
Low: 49 °F
S 10kt
2-3ft
Wednesday
High: 53 °F
SSW 20kt
4-5ft
Wednesday Night
Low: 52 °F
S 25kt
5-6ft

Small Craft Advisory
Thursday
High: 54 °F
SSW 30kt
7-9ft
Thursday Night
Low: 51 °F
SW 30kt
8-9ft
Friday
High: 51 °F
WSW 20kt
6-8ft
Friday Night
Low: 49 °F
W 20kt
8-10ft
Saturday
High: 53 °F
W 10kt
5-7ft
Saturday Night
Low: 50 °F
SSW 15kt
4ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:01 pm AKDT Aug 25, 2026
Forecast Valid: 9pm AKDT Aug 25, 2026-6pm AKDT Sep 1, 2026

View Nearby Observations

Detailed Forecast

...GALE WARNING WEDNESDAY NIGHT...

Synopsis: High pressure migrates east across the Bering through Wed afternoon. A front extending from a 998 mb low pushes into the western Aleutians Wed morning and continues to sweep NE across the Bering through Thu morning. The low finally enters the western Bering 390 nm N of Shemya at 996 mb by Thu afternoon.

Tonight

S wind 5 to 10 kt. A chance of rain, mainly after 10pm. Seas 2 to 3 ft.

Wednesday

SSW wind 15 to 20 kt. Patchy fog. Seas 4 to 5 ft.

Wednesday Night

S wind 20 to 25 kt. A chance of showers, mainly after 1am. Patchy fog. Seas 5 to 6 ft.

Thursday

SSW wind around 30 kt, with gusts as high as 35 kt. A chance of rain before 1pm, then a chance of rain after 4pm. Patchy fog before 10am. Seas 7 to 9 ft.

Thursday Night

SW wind 20 to 30 kt. Rain, mainly between 7pm and 1am. Seas 8 to 9 ft.

Friday

WSW wind around 20 kt, with gusts as high as 25 kt. Scattered showers before 7am. Seas 6 to 8 ft.

Friday Night

W wind 15 to 20 kt, with gusts as high as 25 kt. A chance of showers before 4am. Seas 8 to 10 ft.

Saturday

W wind around 10 kt becoming S in the morning. A chance of showers. Seas 5 to 7 ft.

Saturday Night

SSW wind around 15 kt. A chance of showers. Seas around 4 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.