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Juneau, AK Local Forecast Office

Cape Spencer AK

Marine Point Forecast

[NOTICE]

Tonight
Low: 51 °F
W 20kt
8ft

Small Craft Advisory
Wednesday
High: 56 °F
W 20kt
6-7ft

Small Craft Advisory
Wednesday Night
Low: 49 °F
WSW 10kt
5-6ft

Small Craft Advisory
Thursday
High: 60 °F
NE 10kt
5ft
Thursday Night
Low: 50 °F
NE 15kt
4ft
Friday
High: 59 °F
Light Wind
3ft
Friday Night
Low: 49 °F
Light Wind
2-3ft
Saturday
High: 56 °F
Light Wind
2ft
Saturday Night
Low: 49 °F
Light Wind
2-3ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 8:56 pm AKDT Sep 8, 2026
Forecast Valid: 9pm AKDT Sep 8, 2026-6pm AKDT Sep 15, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

Synopsis: A front swinging through will bring strong SW to W winds across the Gulf and outer coastal waters and strong southerlies for inner channels, with gale force winds impacting Lynn Canal. Winds decrease Wednesday before strong northerly winds impact the inner channels Thursday. Seas 8 to 12 ft for the Gulf and coastal waters through tonight will trend downward beginning later Wednesday.

Tonight

W wind around 20 kt, with gusts as high as 30 kt. Showers. The rain could be heavy at times. Seas around 8 ft.

Wednesday

W wind 10 to 20 kt. Showers and thunderstorms likely before 10am, then scattered showers. Seas 6 to 7 ft.

Wednesday Night

WSW wind 5 to 10 kt becoming S after midnight. Isolated showers before 7pm. Seas 5 to 6 ft.

Thursday

NE wind 5 to 10 kt. Mostly sunny. Seas around 5 ft.

Thursday Night

WNW wind 10 to 15 kt becoming NE after midnight. Mostly clear. Seas around 4 ft.

Friday

Variable winds 5 kt or less. Mostly sunny. Seas around 3 ft.

Friday Night

Variable winds 5 kt or less. Mostly clear. Seas 2 to 3 ft.

Saturday

Variable winds 5 kt or less. Mostly sunny. Seas around 2 ft.

Saturday Night

Variable winds 5 kt or less. A chance of showers. Seas 2 to 3 ft.

*Notices:

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.
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.