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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Tonight
Low: 51 °F
Light Wind
< 1ft
Saturday
High: 54 °F
SE 10kt
1-2ft
Saturday Night
Low: 51 °F
SE 10kt
1-2ft
Sunday
High: 58 °F
Light Wind
1ft
Sunday Night
Low: 51 °F
Light Wind
< 1ft
Monday
High: 55 °F
Light Wind
< 1ft
Monday Night
Low: 50 °F
Light Wind
1ft
Tuesday
High: 57 °F
Light Wind
1ft
Tuesday Night
Low: 48 °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: 3:21 pm AKDT Aug 28, 2026
Forecast Valid: 6pm AKDT Aug 28, 2026-6pm AKDT Sep 4, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY SATURDAY...

Synopsis: A front is expected to bring fresh to strong breezes across the outer and inner waters Friday night and Saturday as it tracks east across Southeast Alaska. A weak low near Prince William Sound will move SE to just off Baranof Island by Sunday.

Tonight

Variable winds 5 kt or less. Rain, mainly after 4am. Seas 1 ft or less.

Saturday

SE wind 5 to 10 kt. Rain. The rain could be heavy at times. Seas 1 to 2 ft.

Saturday Night

SE wind 5 to 10 kt. Rain. The rain could be heavy at times. Seas 1 to 2 ft.

Sunday

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

Sunday Night

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

Monday

Variable winds 5 kt or less. Showers. The rain could be heavy at times. Seas 1 ft or less.

Monday Night

Variable winds 5 kt or less. Showers. The rain could be heavy at times. Seas around 1 ft.

Tuesday

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

Tuesday Night

Variable winds 5 kt or less. A chance of showers. Seas 1 ft or less.

*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.