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Anchorage, AK Local Forecast Office

39NM NW Seguam Island AK

Marine Point Forecast

[NOTICE]

Tonight
Low: 43 °F
ESE 25kt
4-5ft

Small Craft Advisory
Tuesday
High: 47 °F
SSW 20kt
4-5ft
Tuesday Night
Low: 43 °F
SW 20kt
6ft
Wednesday
High: 46 °F
SW 25kt
6-7ft
Wednesday Night
Low: 42 °F
WSW 20kt
5-6ft
Thursday
High: 45 °F
WNW 15kt
4-5ft
Thursday Night
Low: 42 °F
WNW 10kt
3-4ft
Friday
High: 45 °F
WNW 10kt
3ft
Friday Night
Low: 42 °F
ESE 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: 8:45 pm AKDT Jun 29, 2026
Forecast Valid: 9pm AKDT Jun 29, 2026-6pm AKDT Jul 6, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT...

Synopsis: A 987 mb North Pacific 250 nm SE of Shemya before moving to 115 nm W of Saint Paul Island at 1007 mb Wed afternoon. A series of fronts from the low moves across the Aleutians Mon morning through Wed afternoon.

Tonight

ESE wind 20 to 25 kt becoming SSE after midnight. Winds could gust as high as 35 kt. Showers, mainly before 1am. Seas 4 to 5 ft.

Tuesday

SSW wind around 20 kt, with gusts as high as 25 kt. A chance of showers, mainly before 7am. Seas 4 to 5 ft.

Tuesday Night

SW wind around 20 kt, with gusts as high as 30 kt. A slight chance of showers after 1am. Seas around 6 ft.

Wednesday

SW wind 20 to 25 kt. A chance of showers. Seas 6 to 7 ft.

Wednesday Night

WSW wind around 20 kt, with gusts as high as 25 kt. Cloudy. Seas 5 to 6 ft.

Thursday

WNW wind around 15 kt. Cloudy. Seas 4 to 5 ft.

Thursday Night

WNW wind around 10 kt. Mostly cloudy. Seas 3 to 4 ft.

Friday

WNW wind 5 to 10 kt. Mostly cloudy. Seas around 3 ft.

Friday Night

S wind around 10 kt becoming ESE in the evening. 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.