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Juneau, AK Local Forecast Office

Cape Spencer AK

Marine Point Forecast

[NOTICE]
    • Overnight

      Overnight:NE wind 5 to 10 kt. Showers likely, mainly after 4am.   Seas around 3 ft.

      Low: 47 °F

      NE 10kt
      3ft

    • Friday

      Friday:ENE wind around 15 kt. Showers. The rain could be heavy at times.   Seas 3 to 4 ft.

      High: 54 °F

      ENE 15kt
      3-4ft

    • Friday Night

      Friday Night:S wind 10 to 20 kt. Showers. The rain could be heavy at times.   Seas 5 to 7 ft.

      Low: 49 °F

      S 20kt
      5-7ft

    • Saturday

      Saturday:S wind 5 to 10 kt becoming E in the morning. Showers. The rain could be heavy at times.   Seas around 4 ft.

      High: 55 °F

      E 10kt
      4ft

    • Saturday Night

      Saturday Night:E wind around 25 kt, with gusts as high as 40 kt. Showers. Some of the storms could produce heavy rainfall.   Seas 5 ft building to 8 ft.

      Low: 48 °F

      E 25kt
      Waves Building8ft

    • Sunday

      Sunday:E wind 20 to 25 kt becoming SSE 15 to 20 kt in the afternoon. Winds could gust as high as 35 kt. Showers and possibly a thunderstorm.   Seas around 10 ft.

      High: 53 °F

      E 25kt⇓
      10ft

    • Sunday Night

      Sunday Night:SSW wind 15 to 20 kt, with gusts as high as 30 kt. Showers and possibly a thunderstorm.   Seas 8 to 10 ft.

      Low: 47 °F

      SSW 20kt
      8-10ft

    • Monday

      Monday:SSW wind around 10 kt. Showers and possibly a thunderstorm.   Seas 6 to 8 ft.

      High: 52 °F

      SSW 10kt
      6-8ft

    • Monday Night

      Monday Night:S wind 5 to 10 kt becoming E in the evening. Showers.   Seas 5 to 6 ft.

      Low: 45 °F

      E 10kt
      5-6ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 7:56 pm AKDT Sep 17, 2026
Forecast Valid: 12am AKDT Sep 18, 2026-6pm AKDT Sep 24, 2026

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Detailed Forecast


Synopsis: Relatively benign marine conditions expected across the panhandle this evening with the exception of S-ly moderate to fresh breezes in Lynn Canal. Southerly to easterly winds will increase overnight as a strengtheing low lifts north into the Gulf on Friday. Strong to gale breezes and 8 to 12 ft seas for the Gulf and outer coastal waters on Friday as the low lifts north through the Gulf, along with fresh to strong S to SE-ly in the inner channels. Elevated marine conditions continue into the weekend as another large low lifts into the Gulf.

Overnight
NE wind 5 to 10 kt. Showers likely, mainly after 4am. Seas around 3 ft.
Friday
ENE wind around 15 kt. Showers. The rain could be heavy at times. Seas 3 to 4 ft.
Friday Night
S wind 10 to 20 kt. Showers. The rain could be heavy at times. Seas 5 to 7 ft.
Saturday
S wind 5 to 10 kt becoming E in the morning. Showers. The rain could be heavy at times. Seas around 4 ft.
Saturday Night
E wind around 25 kt, with gusts as high as 40 kt. Showers. Some of the storms could produce heavy rainfall. Seas 5 ft building to 8 ft.
Sunday
E wind 20 to 25 kt becoming SSE 15 to 20 kt in the afternoon. Winds could gust as high as 35 kt. Showers and possibly a thunderstorm. Seas around 10 ft.
Sunday Night
SSW wind 15 to 20 kt, with gusts as high as 30 kt. Showers and possibly a thunderstorm. Seas 8 to 10 ft.
Monday
SSW wind around 10 kt. Showers and possibly a thunderstorm. Seas 6 to 8 ft.
Monday Night
S wind 5 to 10 kt becoming E in the evening. Showers. Seas 5 to 6 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: 58.2°N 136.63°W
Last Update: 7:56 pm AKDT Sep 17, 2026
Forecast Valid: 12am AKDT Sep 18, 2026-6pm AKDT Sep 24, 2026
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