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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Tuesday
High: 54 °F
ESE 10kt
1-2ft
Tuesday Night
Low: 43 °F
ESE 10kt
2ft
Wednesday
High: 52 °F
ESE 10kt
2ft
Wednesday Night
Low: 41 °F
Light Wind
1ft
Thursday
High: 54 °F
Light Wind
1ft
Thursday Night
Low: 41 °F
Light Wind
< 1ft
Friday
High: 57 °F
Light Wind
< 1ft
Friday Night
Low: 40 °F
Light Wind
1ft
Saturday
High: 54 °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: 8:46 pm AKDT Sep 21, 2026
Forecast Valid: 1am AKDT Sep 22, 2026-6pm AKDT Sep 28, 2026

View Nearby Observations

Detailed Forecast

Synopsis: Southwest onshore flow will continue through Monday shifting to a south and east as another developing low moving into the southern and eastern gulf by Tuesday. Winds across the inner channels weakening Monday. Another system approaches the southern gulf late Monday into Tuesday building winds and seas again.

Tuesday

ESE wind 5 to 10 kt. Showers, mainly after 10am. Seas 1 to 2 ft.

Tuesday Night

ESE wind 5 to 10 kt. Showers. Seas around 2 ft.

Wednesday

ESE wind 5 to 10 kt. Showers. Seas around 2 ft.

Wednesday Night

Variable winds 5 kt or less. Showers likely, mainly before 10pm. Seas around 1 ft.

Thursday

Variable winds 5 kt or less. A chance of showers before 4pm. Seas around 1 ft.

Thursday Night

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

Friday

Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.

Friday Night

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

Saturday

Variable winds 5 kt or less. A chance of 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.