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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Today
High: 67 °F
Light Wind
< 1ft
Tonight
Low: 54 °F
Light Wind
< 1ft
Monday
High: 59 °F
Light Wind
1ft
Monday Night
Low: 55 °F
Light Wind
< 1ft
Tuesday
High: 62 °F
Light Wind
< 1ft
Tuesday Night
Low: 52 °F
Light Wind
< 1ft
Wednesday
High: 61 °F
Light Wind
< 1ft
Wednesday Night
Low: 53 °F
Light Wind
1ft
Thursday
High: 62 °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: 6:39 am AKDT Aug 16, 2026
Forecast Valid: 7am AKDT Aug 16, 2026-6pm AKDT Aug 22, 2026

View Nearby Observations

Detailed Forecast

Synopsis: Northwest winds begin to diminish along the coast, turning to the southeast, as a low lifts into the Gulf on Sunday. Expect gale force winds to build Sunday night near Cape St. Elias, with fresh to strong breezes toward the Fairweather Grounds and seas of 8 to 11 feet. Winds and seas begin to subside Monday night.

Today

Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

Tonight

Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

Monday

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

Monday Night

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

Tuesday

Variable winds 5 kt or less. Showers, mainly before 10am. Seas 1 ft or less.

Tuesday Night

Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.

Wednesday

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

Wednesday Night

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

Thursday

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.