For More Weather Information:

Juneau, AK Local Forecast Office

Cape Spencer AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 51 °F
S 10kt
6ft
Tonight
Low: 47 °F
E 10kt
5ft
Tuesday
High: 51 °F
ESE 10kt
5ft
Tuesday Night
Low: 47 °F
Light Wind
4ft
Wednesday
High: 52 °F
E 10kt
4ft
Wednesday Night
Low: 46 °F
E 10kt
3-4ft
Thursday
High: 50 °F
Light Wind
3ft
Thursday Night
Low: 45 °F
Light Wind
3ft
Friday
High: 50 °F
SE 10kt
3-4ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 7:49 am AKDT Sep 28, 2026
Forecast Valid: 1pm AKDT Sep 28, 2026-6pm AKDT Oct 4, 2026

View Nearby Observations

Detailed Forecast

Synopsis: A weakening area of low pressure is leading to 15-20 kt winds and seas up to 9 feet in the Gulf of Alaska. Winds up to 20kts are possible in Lynn Canal today, but winds overall are not expected to be as strong as yesterday with the weakening system. By Wednesday, the next low pressure system and front will approach the area, and bring increasing winds and seas.

This Afternoon

S wind around 10 kt. Showers. Seas around 6 ft.

Tonight

SSE wind around 10 kt becoming E in the evening. Showers. The rain could be heavy at times. Seas around 5 ft.

Tuesday

ESE wind around 10 kt. Showers. Seas around 5 ft.

Tuesday Night

Variable winds 5 kt or less. Showers. Seas around 4 ft.

Wednesday

E wind around 10 kt. Showers. Seas around 4 ft.

Wednesday Night

E wind around 10 kt. Showers. Seas 3 to 4 ft.

Thursday

Variable winds 5 kt or less. Showers. Seas around 3 ft.

Thursday Night

Variable winds 5 kt or less. Showers likely. Seas around 3 ft.

Friday

SE wind around 10 kt. Showers likely. Seas 3 to 4 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.