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

39NM NW Seguam Island AK

Marine Point Forecast

[NOTICE]

    • Today

      Today:SW wind around 20 kt, with gusts as high as 25 kt. Isolated showers before 10am, then scattered showers after 1pm. Patchy fog. Seas 5 to 6 ft.

      High: 40 °F

      SW 20kt
      5-6ft

    • Tonight

      Tonight:WSW wind around 25 kt. Scattered showers, mainly after 10pm. Seas around 8 ft.

      Low: 38 °F

      WSW 25kt
      8ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday

      Thursday:WSW wind around 20 kt, with gusts as high as 25 kt. Scattered rain and snow showers before 1pm, then a slight chance of rain showers. Seas 7 to 8 ft.

      High: 39 °F

      WSW 20kt
      7-8ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday Night

      Thursday Night:W wind 15 to 20 kt. Mostly cloudy. Seas 5 to 6 ft.

      Low: 38 °F

      W 20kt
      5-6ft

    • Friday

      Friday:SSW wind 15 to 20 kt becoming SSE 25 to 30 kt in the afternoon. Winds could gust as high as 40 kt. Rain, mainly after 10am. The rain could be heavy at times. Seas 4 ft building to 7 ft.

      High: 41 °F

      ⇑SSE 30kt
      Waves Building7ft

    • Friday Night

      Friday Night:SSW wind 35 to 40 kt, with gusts as high as 50 kt. Rain. Seas 11 to 13 ft.

      Low: 40 °F

      SSW 40kt
      11-13ft

    • Saturday

      Saturday:SW wind 35 to 40 kt, with gusts as high as 45 kt. Rain. Seas 14 ft building to 17 ft.

      High: 41 °F

      SW 40kt
      Waves Building17ft

    • Saturday Night

      Saturday Night:WSW wind around 35 kt, with gusts as high as 40 kt. Rain. Seas 17 ft subsiding to 12 ft.

      Low: 36 °F

      WSW 35kt
      17ftWaves Subsiding

    • Sunday

      Sunday:WNW wind around 35 kt, with gusts as high as 40 kt. Rain and snow. Seas 8 to 10 ft.

      High: 39 °F

      WNW 35kt
      8-10ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:53 am AKDT Apr 15, 2026
Forecast Valid: 8am AKDT Apr 15, 2026-6pm AKDT Apr 21, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

Synopsis: A 999 mb low 305 nm N of Shemya moves to 100 nm NW of Saint Paul at 1001 mb by Thu morning. This low moves into southwest Alaska Thu night. Multiple fronts move across the Aleutian Chain through Thu afternoon. A 986 mb North Pacific low moves to 270 nm S of Shemya Thu night.

Today
SW wind around 20 kt, with gusts as high as 25 kt. Isolated showers before 10am, then scattered showers after 1pm. Patchy fog. Seas 5 to 6 ft.
Tonight
WSW wind around 25 kt. Scattered showers, mainly after 10pm. Seas around 8 ft.
Thursday
WSW wind around 20 kt, with gusts as high as 25 kt. Scattered rain and snow showers before 1pm, then a slight chance of rain showers. Seas 7 to 8 ft.
Thursday Night
W wind 15 to 20 kt. Mostly cloudy. Seas 5 to 6 ft.
Friday
SSW wind 15 to 20 kt becoming SSE 25 to 30 kt in the afternoon. Winds could gust as high as 40 kt. Rain, mainly after 10am. The rain could be heavy at times. Seas 4 ft building to 7 ft.
Friday Night
SSW wind 35 to 40 kt, with gusts as high as 50 kt. Rain. Seas 11 to 13 ft.
Saturday
SW wind 35 to 40 kt, with gusts as high as 45 kt. Rain. Seas 14 ft building to 17 ft.
Saturday Night
WSW wind around 35 kt, with gusts as high as 40 kt. Rain. Seas 17 ft subsiding to 12 ft.
Sunday
WNW wind around 35 kt, with gusts as high as 40 kt. Rain and snow. Seas 8 to 10 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: 52.89°N 173.1°W
Last Update: 4:53 am AKDT Apr 15, 2026
Forecast Valid: 8am AKDT Apr 15, 2026-6pm AKDT Apr 21, 2026
  Forecast Discussion
  Get as KML Get as XML

RADAR & SATELLITE IMAGES

 Link to Satellite Data