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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Today
High: 61 °F
Light Wind
1ft
Tonight
Low: 53 °F
Light Wind
< 1ft
Thursday
High: 62 °F
Light Wind
< 1ft
Thursday Night
Low: 55 °F
Light Wind
< 1ft
Friday
High: 63 °F
Light Wind
< 1ft
Friday Night
Low: 53 °F
Light Wind
< 1ft
Saturday
High: 60 °F
Light Wind
< 1ft
Saturday Night
Low: 51 °F
Light Wind
1ft
Sunday
High: 58 °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: 6:17 am AKDT Aug 19, 2026
Forecast Valid: 10am AKDT Aug 19, 2026-6pm AKDT Aug 25, 2026

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Detailed Forecast

Synopsis: A weak front in the Gulf of Alaska Wednesday will bring increasing southeasterly winds, with fresh to strong winds for northeast Gulf coast. By Thursday morning, the low pressure system will strengthen, and lead to winds up to 25 kts between Cape Spencer and Cape Suckling.

Today

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

Tonight

Variable winds 5 kt or less. A chance of rain, mainly before 10pm. Patchy fog after 1am. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. A slight chance of rain between 7am and 10am. Patchy fog before 10am. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of rain after 1am. Patchy fog after 10pm. Seas 1 ft or less.

Friday

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

Friday Night

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

Saturday

Variable winds 5 kt or less. Rain likely. Seas 1 ft or less.

Saturday Night

Variable winds 5 kt or less. Rain likely. Seas around 1 ft.

Sunday

Variable winds 5 kt or less. Rain. Seas around 1 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.