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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 59 °F
Light Wind
1ft
Tonight
Low: 47 °F
Light Wind
1ft
Thursday
High: 59 °F
Light Wind
< 1ft
Thursday Night
Low: 46 °F
Light Wind
1ft
Friday
High: 62 °F
Light Wind
< 1ft
Friday Night
Low: 45 °F
Light Wind
< 1ft
Saturday
High: 64 °F
Light Wind
< 1ft
Saturday Night
Low: 46 °F
Light Wind
< 1ft
Sunday
High: 61 °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: 3:24 pm AKDT Sep 9, 2026
Forecast Valid: 5pm AKDT Sep 9, 2026-6pm AKDT Sep 16, 2026

View Nearby Observations

Detailed Forecast

Synopsis: Winds are diminishing as the front moves further southeast into Canada. Northerly winds build across the inner channels Thursday, strengthening to near gale force conditions for Lynn Canal and fresh to strong breezes for much of the inner channels by Thursday night. Conditions expected to improve Friday.

This Afternoon

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

Tonight

Variable winds 5 kt or less. A chance of showers before 7pm. Areas of fog after 10pm. Seas around 1 ft.

Thursday

Variable winds 5 kt or less. Areas of fog before 10am. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.

Friday

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

Friday Night

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

Saturday

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

Saturday Night

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

Sunday

Variable winds 5 kt or less. Mostly sunny. 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.