National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

For More Weather Information:

Anchorage, AK Local Forecast Office

34NM ESE Seguam Island AK

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:NE wind 5 to 15 kt becoming E after midnight. Showers likely, mainly after 3am. Seas 8 to 9 ft.

      Low: 42 °F

      E 15kt
      8-9ft

      Small Craft Advisory
      Small Craft Advisory

    • Monday

      Monday:ENE wind around 20 kt, with gusts as high as 35 kt. Showers. Seas 9 ft building to 13 ft.

      High: 42 °F

      ENE 20kt
      Waves Building13ft

      Small Craft Advisory
      Small Craft Advisory

    • Monday Night

      Monday Night:NNE wind 15 to 20 kt, with gusts as high as 30 kt. Showers, mainly before midnight, then rain after midnight. Seas 13 to 15 ft.

      Low: 41 °F

      NNE 20kt
      13-15ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday

      Tuesday:N wind 20 to 25 kt increasing to 25 to 30 kt in the afternoon. Winds could gust as high as 40 kt. Rain. Seas 17 ft building to 21 ft.

      High: 43 °F

      ⇑N 30kt
      Waves Building21ft

    • Tuesday Night

      Tuesday Night:NNW wind 30 to 35 kt, with gusts as high as 45 kt. Rain likely, mainly before midnight. Seas 22 ft building to 26 ft.

      Low: 38 °F

      NNW 35kt
      Waves Building26ft

    • Wednesday

      Wednesday:NNW wind 30 to 35 kt decreasing to 25 to 30 kt in the morning. Winds could gust as high as 50 kt. A chance of rain before 9am. Seas 26 ft building to 30 ft.

      High: 41 °F

      NNW 35kt⇓
      Waves Building30ft

    • Wednesday Night

      Wednesday Night:NNW wind 20 to 25 kt, with gusts as high as 45 kt. A chance of rain after 9pm. Seas 26 ft subsiding to 17 ft.

      Low: 38 °F

      NNW 25kt
      26ftWaves Subsiding

    • Thursday

      Thursday:NNW wind 15 to 20 kt decreasing to 10 to 15 kt in the afternoon. Winds could gust as high as 35 kt. A chance of rain. Seas 17 ft subsiding to 11 ft.

      High: 41 °F

      NNW 20kt⇓
      17ftWaves Subsiding

    • Thursday Night

      Thursday Night:NNW wind 5 to 10 kt becoming S after midnight. A chance of rain. Seas 11 ft subsiding to 7 ft.

      Low: 38 °F

      S 10kt
      11ftWaves Subsiding


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:57 pm AKST Nov 30, 2025
Forecast Valid: 7pm AKST Nov 30, 2025-6pm AKST Dec 7, 2025

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

Synopsis: An elongated 980 mb trough at 185 nm SE of Unalaska merges with a circulation from the south and becomes a complex of low centers with the strongest at 968 mb at 260 nm S of Unalaska Mon afternoon. The complex continues to 120 nm W of Unalaska at 970 mb by Tue afternoon. Multiple fronts move into the Bering through Tue afternoon.

Tonight
NE wind 5 to 15 kt becoming E after midnight. Showers likely, mainly after 3am. Seas 8 to 9 ft.
Monday
ENE wind around 20 kt, with gusts as high as 35 kt. Showers. Seas 9 ft building to 13 ft.
Monday Night
NNE wind 15 to 20 kt, with gusts as high as 30 kt. Showers, mainly before midnight, then rain after midnight. Seas 13 to 15 ft.
Tuesday
N wind 20 to 25 kt increasing to 25 to 30 kt in the afternoon. Winds could gust as high as 40 kt. Rain. Seas 17 ft building to 21 ft.
Tuesday Night
NNW wind 30 to 35 kt, with gusts as high as 45 kt. Rain likely, mainly before midnight. Seas 22 ft building to 26 ft.
Wednesday
NNW wind 30 to 35 kt decreasing to 25 to 30 kt in the morning. Winds could gust as high as 50 kt. A chance of rain before 9am. Seas 26 ft building to 30 ft.
Wednesday Night
NNW wind 20 to 25 kt, with gusts as high as 45 kt. A chance of rain after 9pm. Seas 26 ft subsiding to 17 ft.
Thursday
NNW wind 15 to 20 kt decreasing to 10 to 15 kt in the afternoon. Winds could gust as high as 35 kt. A chance of rain. Seas 17 ft subsiding to 11 ft.
Thursday Night
NNW wind 5 to 10 kt becoming S after midnight. A chance of rain. Seas 11 ft subsiding 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.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

Point Forecast: 52.17°N 171.65°W
Last Update: 2:57 pm AKST Nov 30, 2025
Forecast Valid: 7pm AKST Nov 30, 2025-6pm AKST Dec 7, 2025
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

 Link to Satellite Data