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Hazardous Weather Conditions

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Anchorage, AK Local Forecast Office

39NM NW Seguam Island AK

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:W wind 25 to 30 kt. Partly cloudy. Seas around 8 ft.

      Low: 38 °F

      W 30kt
      8ft

      Small Craft Advisory
      Small Craft Advisory

    • Friday

      Friday:W wind 15 to 20 kt. Partly sunny. Seas 6 to 7 ft.

      High: 41 °F

      W 20kt
      6-7ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. A chance of rain, mainly after 1am. Seas 4 to 5 ft.

      Low: 37 °F

      Light Wind
      4-5ft

    • Saturday

      Saturday:NNW wind around 15 kt. A chance of rain before 10am. Seas around 4 ft.

      High: 41 °F

      NNW 15kt
      4ft

    • Saturday Night

      Saturday Night:NNW wind around 10 kt becoming NNE after midnight. A chance of rain after 4am. Seas 3 to 4 ft.

      Low: 37 °F

      NNW 10kt
      3-4ft

    • Sunday

      Sunday:E wind 15 to 20 kt increasing to 25 to 30 kt in the afternoon. Winds could gust as high as 35 kt. Rain, mainly after 10am. Seas 4 ft building to 9 ft.

      High: 42 °F

      ⇑E 30kt
      Waves Building9ft

    • Sunday Night

      Sunday Night:E wind around 40 kt, with gusts as high as 50 kt. Showers. Seas 11 ft subsiding to 5 ft.

      Low: 38 °F

      E 40kt
      11ftWaves Subsiding

    • Memorial Day

      Memorial Day:W wind around 30 kt, with gusts as high as 35 kt. Showers. Seas around 6 ft.

      High: 42 °F

      W 30kt
      6ft

    • Monday Night

      Monday Night:W wind around 35 kt. Showers. Seas 5 to 7 ft.

      Low: 38 °F

      W 35kt
      5-7ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:44 pm AKDT May 21, 2026
Forecast Valid: 8pm AKDT May 21, 2026-6pm AKDT May 28, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY TONIGHT...

Synopsis: A 991 mb low 80 nm SW of Cape Newenham moves inland by Fri morning. This low stalls and weakens along the Southwest Alaska coast through Sat afternoon.

Tonight
W wind 25 to 30 kt. Partly cloudy. Seas around 8 ft.
Friday
W wind 15 to 20 kt. Partly sunny. Seas 6 to 7 ft.
Friday Night
Variable winds 5 kt or less. A chance of rain, mainly after 1am. Seas 4 to 5 ft.
Saturday
NNW wind around 15 kt. A chance of rain before 10am. Seas around 4 ft.
Saturday Night
NNW wind around 10 kt becoming NNE after midnight. A chance of rain after 4am. Seas 3 to 4 ft.
Sunday
E wind 15 to 20 kt increasing to 25 to 30 kt in the afternoon. Winds could gust as high as 35 kt. Rain, mainly after 10am. Seas 4 ft building to 9 ft.
Sunday Night
E wind around 40 kt, with gusts as high as 50 kt. Showers. Seas 11 ft subsiding to 5 ft.
Memorial Day
W wind around 30 kt, with gusts as high as 35 kt. Showers. Seas around 6 ft.
Monday Night
W wind around 35 kt. Showers. Seas 5 to 7 ft.

*Notices:

  1. 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.
  2. 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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ABOUT THIS FORECAST

Point Forecast: 52.89°N 173.1°W
Last Update: 3:44 pm AKDT May 21, 2026
Forecast Valid: 8pm AKDT May 21, 2026-6pm AKDT May 28, 2026
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