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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Tonight
Low: 48 °F
Light Wind
1ft
Wednesday
High: 59 °F
Light Wind
1ft
Wednesday Night
Low: 49 °F
Light Wind
1ft
Thursday
High: 57 °F
Light Wind
1ft
Thursday Night
Low: 49 °F
Light Wind
< 1ft
Friday
High: 59 °F
Light Wind
< 1ft
Friday Night
Low: 49 °F
Light Wind
< 1ft
Saturday
High: 61 °F
Light Wind
< 1ft
Saturday Night
Low: 50 °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: 3:49 pm AKDT Jul 7, 2026
Forecast Valid: 7pm AKDT Jul 7, 2026-6pm AKDT Jul 14, 2026

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Detailed Forecast

Synopsis: Areas of slightly increased winds continue this afternoon into this evening, as the low pressure system moves southeasterly. Overall winds and seas diminish overnight into Wednesday as the low dissipates. Another system moves into the gulf Wednesday afternoon once again bringing increased southeasterly winds throughout the gulf.

Tonight

Variable winds 5 kt or less. Showers. Patchy fog after 1am. Seas around 1 ft.

Wednesday

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

Wednesday Night

Variable winds 5 kt or less. Showers likely. Patchy fog after 1am. Seas around 1 ft.

Thursday

Variable winds 5 kt or less. Showers. Patchy fog before 10am. Seas around 1 ft.

Thursday Night

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

Friday

Variable winds 5 kt or less. A chance of showers after 10am. Seas 1 ft or less.

Friday Night

Variable winds 5 kt or less. A chance of showers before 10pm. Seas 1 ft or less.

Saturday

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

Saturday Night

Variable winds 5 kt or less. Mostly cloudy. 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.