For More Weather Information:

Anchorage, AK Local Forecast Office

39NM NW Seguam Island AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 47 °F
SW 20kt
5ft
Tonight
Low: 43 °F
SSW 25kt
6ft

Small Craft Advisory
Wednesday
High: 46 °F
SW 25kt
7ft

Small Craft Advisory
Wednesday Night
Low: 42 °F
W 20kt
6ft
Thursday
High: 45 °F
WNW 15kt
3-4ft
Thursday Night
Low: 42 °F
W 15kt
3ft
Friday
High: 45 °F
NW 15kt
3ft
Friday Night
Low: 42 °F
ESE 10kt
2-3ft
Independence Day
High: 46 °F
ESE 15kt
3ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 1:00 pm AKDT Jun 30, 2026
Forecast Valid: 2pm AKDT Jun 30, 2026-6pm AKDT Jul 6, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

Synopsis: A 992 mb low 190 nm W of Shemya moves to 220 nm NW of Adak at 1005 mb Wed morning. The low continues to 50 nm W of Cape Newenham at 1008 mb Thu morning. Its front pushes north across the Bering through Wed morning.

This Afternoon

SW wind around 20 kt. Partly sunny. Seas around 5 ft.

Tonight

SSW wind 20 to 25 kt. A chance of showers, mainly after 4am. Seas around 6 ft.

Wednesday

SW wind 20 to 25 kt. Showers likely, mainly between 7am and 1pm. Seas around 7 ft.

Wednesday Night

W wind around 20 kt. Cloudy. Seas around 6 ft.

Thursday

WNW wind around 15 kt. Cloudy. Seas 3 to 4 ft.

Thursday Night

W wind 10 to 15 kt. Mostly cloudy. Seas around 3 ft.

Friday

NW wind 5 to 15 kt. Mostly cloudy. Seas around 3 ft.

Friday Night

WNW wind 5 to 10 kt becoming ESE in the evening. A chance of showers. Seas 2 to 3 ft.

Independence Day

ESE wind around 15 kt. Showers likely. Seas around 3 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.