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New: NWS Anchorage will beginning issuing Heat Advisories on or about June 9, 2026.

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39NM NW Seguam Island AK

[NOTICE]

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Last Update: 4:25 am AKDT May 22, 2026
Forecast Valid: 5am AKDT May 22, 2026-6pm AKDT May 28, 2026

Synopsis: A high pressure system over the Western Aleutian Islands Sat afternoon progresses eastward.

Today

W wind 20 to 25 kt decreasing to 10 to 15 kt in the afternoon. Mostly sunny. Seas 5 to 7 ft.

Tonight

Variable winds 5 kt or less. Scattered showers, mainly after 1am. Seas 4 to 5 ft.

Saturday

NNW wind around 15 kt. Scattered showers, mainly before 7am. Seas 3 to 4 ft.

Saturday Night

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

Sunday

E wind 10 to 20 kt increasing to 20 to 30 kt in the afternoon. Rain, mainly after 10am. The rain could be heavy at times. Seas 3 ft building to 7 ft.

Sunday Night

SE wind 35 to 40 kt decreasing to 25 to 30 kt after midnight. Winds could gust as high as 50 kt. Rain. Seas 12 to 14 ft.

Memorial Day

ENE wind 25 to 30 kt becoming NNW in the morning. Showers, mainly before 10am. Seas 10 to 11 ft.

Monday Night

WNW wind around 30 kt. Showers likely. Seas 11 to 12 ft.

Tuesday

WNW wind 25 to 30 kt. Showers likely. Seas 9 to 10 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.

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