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Juneau, AK Local Forecast Office

Harbor Island AK

Marine Point Forecast

[NOTICE]
    • Today

      Today:Variable winds 5 kt or less. A chance of rain, mainly before 10am.   Seas around 1 ft.

      High: 44 °F

      Light Wind
      1ft

    • Tonight

      Tonight:SE wind 15 to 25 kt, with gusts as high as 35 kt. Rain, mainly after 7pm.   Seas 3 to 5 ft.

      Low: 44 °F

      SE 25kt
      3-5ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday

      Tuesday:SSE wind around 30 kt, with gusts as high as 40 kt. Rain. The rain could be heavy at times.   Seas 6 to 7 ft.

      High: 47 °F

      SSE 30kt
      6-7ft

      Gale Warning
      Gale Warning

    • Tuesday Night

      Tuesday Night:S wind 25 to 30 kt, with gusts as high as 40 kt. Rain. The rain could be heavy at times.   Seas 6 to 7 ft.

      Low: 44 °F

      S 30kt
      6-7ft

      Small Craft Advisory
      Small Craft Advisory

    • Wednesday

      Wednesday:SSE wind around 25 kt, with gusts as high as 35 kt. Showers.   Seas 5 to 6 ft.

      High: 44 °F

      SSE 25kt
      5-6ft

      Small Craft Advisory
      Small Craft Advisory

    • Wednesday Night

      Wednesday Night:SSE wind around 20 kt. Showers.   Seas around 4 ft.

      Low: 41 °F

      SSE 20kt
      4ft

    • Thursday

      Thursday:SE wind 10 to 15 kt. Showers.   Seas 2 to 3 ft.

      High: 42 °F

      SE 15kt
      2-3ft

    • Thursday Night

      Thursday Night:SE wind around 10 kt. Showers likely.   Seas around 2 ft.

      Low: 36 °F

      SE 10kt
      2ft

    • Friday

      Friday:Variable winds 5 kt or less. A chance of showers.   Seas around 1 ft.

      High: 42 °F

      Light Wind
      1ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 6:43 am AKDT Oct 19, 2026
Forecast Valid: 7am AKDT Oct 19, 2026-6pm AKDT Oct 25, 2026

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Detailed Forecast

...GALE WARNING LATE TONIGHT THROUGH TUESDAY...

Synopsis: Overall conditions deteriorate from west to east across the Gulf starting Monday afternoon as a strong system pushes across the Gulf coast through Monday night. Hazardous marine conditions will continue Monday night through Tuesday night for the Gulf, Gulf Coast, and Inner Channel waters as a secondary reinforcing front merges with the first system. Mariners should expect sustained gales, storm force wind gusts and hazardous seas reaching up to 20 to 30 ft across the NE Gulf Coast. Conditions gradually improve starting Wednesday morning with general westerly to southwesterly winds across the Gulf and Gulf coast.

Today
Variable winds 5 kt or less. A chance of rain, mainly before 10am. Seas around 1 ft.
Tonight
SE wind 15 to 25 kt, with gusts as high as 35 kt. Rain, mainly after 7pm. Seas 3 to 5 ft.
Tuesday
SSE wind around 30 kt, with gusts as high as 40 kt. Rain. The rain could be heavy at times. Seas 6 to 7 ft.
Tuesday Night
S wind 25 to 30 kt, with gusts as high as 40 kt. Rain. The rain could be heavy at times. Seas 6 to 7 ft.
Wednesday
SSE wind around 25 kt, with gusts as high as 35 kt. Showers. Seas 5 to 6 ft.
Wednesday Night
SSE wind around 20 kt. Showers. Seas around 4 ft.
Thursday
SE wind 10 to 15 kt. Showers. Seas 2 to 3 ft.
Thursday Night
SE wind around 10 kt. Showers likely. Seas around 2 ft.
Friday
Variable winds 5 kt or less. A chance of showers. Seas around 1 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: 57.75°N 133.65°W
Last Update: 6:43 am AKDT Oct 19, 2026
Forecast Valid: 7am AKDT Oct 19, 2026-6pm AKDT Oct 25, 2026
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