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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 46 °F
Light Wind
1ft
Tonight
Low: 39 °F
Light Wind
1ft
Friday
High: 47 °F
Light Wind
1ft
Friday Night
Low: 42 °F
Light Wind
1ft
Saturday
High: 50 °F
E 10kt
1-2ft
Saturday Night
Low: 41 °F
Light Wind
1ft
Sunday
High: 50 °F
E 10kt
1-2ft
Sunday Night
Low: 42 °F
ESE 10kt
2ft
Monday
High: 46 °F
SE 10kt
1-2ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 10:01 am AKST Nov 12, 2026
Forecast Valid: 2pm AKST Nov 12, 2026-6pm AKST Nov 18, 2026

View Nearby Observations

Detailed Forecast

Synopsis: Winds will remain somewhat elevated during the morning hours before diminishing during the afternoon hours. A stronger low passes south of the area this evening, with a transition to northerly winds up to 25 knots. A weak system pushing northward Friday, transitioning winds back to southerly.

This Afternoon

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

Tonight

Variable winds 5 kt or less. A chance of rain after 3am. Seas around 1 ft.

Friday

Variable winds 5 kt or less. Rain likely, mainly between 9am and 3pm. Seas around 1 ft.

Friday Night

Variable winds 5 kt or less. Rain likely, mainly after midnight. Seas around 1 ft.

Saturday

E wind 5 to 10 kt. A chance of rain. Seas 1 to 2 ft.

Saturday Night

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

Sunday

E wind 5 to 10 kt. A chance of rain. Seas 1 to 2 ft.

Sunday Night

ESE wind around 10 kt. Rain. Seas around 2 ft.

Monday

SE wind 5 to 10 kt. Rain. Seas 1 to 2 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.