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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Today
High: 55 °F
Light Wind
1ft
Tonight
Low: 50 °F
Light Wind
< 1ft
Thursday
High: 56 °F
Light Wind
1ft
Thursday Night
Low: 49 °F
Light Wind
1ft
Friday
High: 55 °F
SE 10kt
1-2ft
Friday Night
Low: 48 °F
SE 10kt
2ft
Saturday
High: 56 °F
SE 10kt
1-2ft
Saturday Night
Low: 48 °F
SE 10kt
2ft
Sunday
High: 55 °F
SSE 10kt
2ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:44 am AKDT Sep 16, 2026
Forecast Valid: 5am AKDT Sep 16, 2026-6pm AKDT Sep 22, 2026

View Nearby Observations

Detailed Forecast

Synopsis: A front swinging through will bring strong winds across the Gulf, outer coastal waters and into the northern inner channels through this evening. Gales expected for northern Lynn Canal today. Seas building to 8 to 11 feet in the Gulf and outer coastal waters. Winds and seas will diminish overnight into Thursday before the next system brings elevated winds and seas on Friday.

Today

Variable winds 5 kt or less. Rain, mainly after 10am. Seas around 1 ft.

Tonight

Variable winds 5 kt or less. Rain, mainly before 7pm. Patchy fog after 1am. Seas 1 ft or less.

Thursday

Variable winds 5 kt or less. Rain likely. Patchy fog before 7am. Seas around 1 ft.

Thursday Night

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

Friday

SE wind 5 to 10 kt. Rain. The rain could be heavy at times. Seas 1 to 2 ft.

Friday Night

SE wind 5 to 10 kt. Rain. The rain could be heavy at times. Seas around 2 ft.

Saturday

SE wind 5 to 10 kt. Showers. Seas 1 to 2 ft.

Saturday Night

SE wind around 10 kt. Showers. The rain could be heavy at times. Seas around 2 ft.

Sunday

SSE wind around 10 kt. Showers. The rain could be heavy at times. Seas around 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.