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Anchorage, AK Local Forecast Office

39NM NW Seguam Island AK

Marine Point Forecast

[NOTICE]

Tonight
Low: 44 °F
ESE 20kt
4-5ft
Monday
High: 48 °F
E 15kt
3ft
Monday Night
Low: 43 °F
WSW 20kt
3ft
Tuesday
High: 48 °F
WSW 20kt
4ft
Tuesday Night
Low: 42 °F
WNW 20kt
3ft
Wednesday
High: 46 °F
WNW 15kt
3ft
Wednesday Night
Low: 43 °F
WSW 15kt
3ft
Thursday
High: 47 °F
E 15kt
3-4ft
Thursday Night
Low: 44 °F
ESE 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: 8:04 pm AKDT Jul 5, 2026
Forecast Valid: 9pm AKDT Jul 5, 2026-6pm AKDT Jul 12, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY TONIGHT...

Synopsis: A 1008 mb low 130 nm SW of Amchitka moves to 70 nm NE of Shemya at 1008 mb by Mon morning and continues to 30 nm W of St. George at 1000 mb by Tue morning. Its front moves across the Aleutian Chain through Tue morning.

Tonight

ESE wind 15 to 20 kt. Rain likely, mainly after 10pm. Areas of fog. Seas 4 to 5 ft.

Monday

E wind 5 to 15 kt becoming W in the afternoon. A chance of rain, mainly before 10am. Areas of fog. Seas around 3 ft.

Monday Night

WSW wind 15 to 20 kt. Areas of fog. Seas around 3 ft.

Tuesday

WSW wind around 20 kt. Patchy fog before 10am. Seas around 4 ft.

Tuesday Night

WNW wind 15 to 20 kt. Mostly cloudy. Seas around 3 ft.

Wednesday

WNW wind around 15 kt. Mostly cloudy. Seas around 3 ft.

Wednesday Night

WSW wind 10 to 15 kt. A chance of showers after 4am. Seas around 3 ft.

Thursday

E wind 10 to 15 kt. Showers likely. Seas 3 to 4 ft.

Thursday Night

ESE wind 10 to 15 kt becoming SSE in the evening. Showers likely. 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.