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Anchorage, AK Local Forecast Office

39NM NW Seguam Island AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 46 °F
SSW 20kt
6ft
Tonight
Low: 42 °F
SSW 25kt
6ft

Small Craft Advisory
Friday
High: 45 °F
SSW 25kt
5-6ft

Small Craft Advisory
Friday Night
Low: 41 °F
SSW 25kt
5-6ft
Saturday
High: 45 °F
SW 20kt
5ft
Saturday Night
Low: 41 °F
SW 20kt
5ft
Sunday
High: 45 °F
W 15kt
4-5ft
Sunday Night
Low: 41 °F
SW 10kt
2-3ft
Monday
High: 46 °F
SSE 10kt
2ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 6:41 am AKDT Jun 25, 2026
Forecast Valid: 2pm AKDT Jun 25, 2026-6pm AKDT Jul 1, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

Synopsis: A 997 mb low 220 nm N of Amchitka Island moves to 290 nm W of St. George at 999 mb by Fri morning. The system remains nearly stationary through Sat morning, weakening to 1003 mb.

This Afternoon

SSW wind around 20 kt. Patchy fog. Seas around 6 ft.

Tonight

SSW wind 20 to 25 kt. A slight chance of rain after 1am. Patchy fog. Seas around 6 ft.

Friday

SSW wind 20 to 25 kt. A chance of rain, mainly after 7am. Patchy fog. Seas 5 to 6 ft.

Friday Night

SSW wind 20 to 25 kt. Rain likely, mainly after 1am. Patchy fog. Seas 5 to 6 ft.

Saturday

SW wind around 20 kt. Rain, mainly after 4pm. Patchy fog before 10am. Seas around 5 ft.

Saturday Night

SW wind 15 to 20 kt. Rain before 10pm, then a chance of rain after 4am. Seas around 5 ft.

Sunday

W wind around 15 kt, with gusts as high as 20 kt. A chance of showers before 10am. Seas 4 to 5 ft.

Sunday Night

SW wind around 10 kt. Mostly cloudy. Seas 2 to 3 ft.

Monday

SSE wind around 10 kt. A chance of showers. Seas around 2 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.