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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Thursday
High: 60 °F
Light Wind
< 1ft
Thursday Night
Low: 53 °F
Light Wind
< 1ft
Friday
High: 63 °F
Light Wind
< 1ft
Friday Night
Low: 50 °F
Light Wind
< 1ft
Saturday
High: 55 °F
SE 10kt
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: 59 °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: 8:36 pm AKDT Aug 26, 2026
Forecast Valid: 1am AKDT Aug 27, 2026-6pm AKDT Sep 2, 2026

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Detailed Forecast

Synopsis: Weak low pressure will move southward in the Gulf of Alaska through tonight. Fog is expected Thursday morning, especially across the southern inner channels. Seas gradually build Thursday into Friday.

Thursday

Variable winds 5 kt or less. A chance of showers, mainly before 1pm. Patchy fog before 1pm. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A slight chance of showers between 7pm and 10pm. Patchy fog after 10pm. Seas 1 ft or less.

Friday

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

Friday Night

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

Saturday

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

Sunday Night

Variable winds 5 kt or less. Rain likely. Patchy fog after 10pm. Seas 1 ft or less.

Monday

Variable winds 5 kt or less. Rain likely. Patchy fog before 10am. 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.