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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 56 °F
ESE 10kt
2ft
Tonight
Low: 50 °F
ESE 10kt
2ft
Tuesday
High: 58 °F
Light Wind
1-2ft
Tuesday Night
Low: 48 °F
Light Wind
< 1ft
Wednesday
High: 61 °F
Light Wind
< 1ft
Wednesday Night
Low: 49 °F
Light Wind
< 1ft
Thursday
High: 63 °F
Light Wind
< 1ft
Thursday Night
Low: 49 °F
Light Wind
1ft
Friday
High: 63 °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: 11:39 am AKDT Aug 31, 2026
Forecast Valid: 12pm AKDT Aug 31, 2026-6pm AKDT Sep 6, 2026

View Nearby Observations

Detailed Forecast

Synopsis: A stronger low will develop in the northern gulf Monday and slide down the coastline to Haida Gwaii through Tuesday morning. Widespread fresh breezes to near gales will accompany this system, with wave heights up to 9 ft for the outside waters and up to 14 ft for the offshore waters.

This Afternoon

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

Tonight

ESE wind 5 to 10 kt. Showers, with thunderstorms also possible after 1am. Seas around 2 ft.

Tuesday

Variable winds 5 kt or less. Showers. Seas 1 to 2 ft.

Tuesday Night

Variable winds 5 kt or less. A chance of showers after 10pm. Patchy fog after 4am. Seas 1 ft or less.

Wednesday

Variable winds 5 kt or less. A chance of showers between 10am and 4pm. Patchy fog before 10am. Seas 1 ft or less.

Wednesday Night

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

Thursday

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

Thursday Night

Variable winds 5 kt or less. Patchy fog after 4am. Seas around 1 ft.

Friday

Variable winds 5 kt or less. 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.