For More Weather Information:

Juneau, AK Local Forecast Office

Cape Spencer AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 61 °F
Light Wind
3ft
Tonight
Low: 45 °F
Light Wind
3ft
Friday
High: 58 °F
Light Wind
3ft
Friday Night
Low: 48 °F
W 10kt
3-4ft
Saturday
High: 53 °F
W 10kt
4ft
Saturday Night
Low: 51 °F
W 10kt
4ft
Sunday
High: 56 °F
Light Wind
4ft
Sunday Night
Low: 50 °F
Light Wind
3-4ft
Labor Day
High: 56 °F
Light Wind
3ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 6:35 am AKDT Sep 3, 2026
Forecast Valid: 12pm AKDT Sep 3, 2026-6pm AKDT Sep 9, 2026

View Nearby Observations

Detailed Forecast

Synopsis: Wednesday night sustained northerly winds build to 15 to 25 knots through most north south orientated channels, persisting into Thursday. Northerly winds begin to diminish late Thursday. Sea breezes begin to impact the inside over the weekend.

This Afternoon

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

Tonight

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

Friday

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

Friday Night

W wind 5 to 10 kt. Mostly clear. Seas 3 to 4 ft.

Saturday

W wind 5 to 10 kt. Mostly sunny. Seas around 4 ft.

Saturday Night

W wind 5 to 10 kt. Mostly cloudy. Seas around 4 ft.

Sunday

Variable winds 5 kt or less. A chance of showers. Seas around 4 ft.

Sunday Night

Variable winds 5 kt or less. Showers likely. Seas 3 to 4 ft.

Labor Day

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