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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Friday
High: 56 °F
Light Wind
1ft
Friday Night
Low: 40 °F
Light Wind
1ft
Saturday
High: 54 °F
ESE 10kt
1-2ft
Saturday Night
Low: 41 °F
ESE 10kt
2ft
Sunday
High: 54 °F
SE 10kt
2ft
Sunday Night
Low: 44 °F
SE 10kt
2ft
Monday
High: 52 °F
SE 10kt
1-2ft
Monday Night
Low: 45 °F
Light Wind
1ft
Tuesday
High: 52 °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: 3:06 am AKDT Sep 25, 2026
Forecast Valid: 3am AKDT Sep 25, 2026-6pm AKDT Oct 1, 2026

View Nearby Observations

Detailed Forecast

Synopsis: As a low pressure system west of Baranof Island continues weakening, a front will approach from the west late Friday into early Saturday. This will begin a pattern with elevated winds and seas for the inner channels, with gale force winds expected with a barrier jet near Cape Suckling, late Friday into Saturday.

Friday

Variable winds 5 kt or less. Sunny. Seas around 1 ft.

Friday Night

Variable winds 5 kt or less. A slight chance of rain after 4am. Seas around 1 ft.

Saturday

ESE wind 5 to 10 kt. Rain likely, mainly after 4pm. Seas 1 to 2 ft.

Saturday Night

ESE wind 5 to 10 kt. Rain. The rain could be heavy at times. Seas around 2 ft.

Sunday

SE wind around 10 kt. Rain. The rain could be heavy at times. Seas around 2 ft.

Sunday Night

SE wind around 10 kt. Rain. The rain could be heavy at times. Seas around 2 ft.

Monday

SE wind 5 to 10 kt. Showers. Seas 1 to 2 ft.

Monday Night

Variable winds 5 kt or less. Showers. Seas around 1 ft.

Tuesday

Variable winds 5 kt or less. Showers. Seas around 1 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.