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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Thursday
High: 46 °F
Light Wind
< 1ft
Thursday Night
Low: 33 °F
Light Wind
< 1ft
Friday
High: 45 °F
Light Wind
< 1ft
Friday Night
Low: 32 °F
Light Wind
1ft
Saturday
High: 45 °F
ESE 10kt
1-2ft
Saturday Night
Low: 34 °F
ESE 10kt
2ft
Sunday
High: 45 °F
ESE 10kt
2ft
Sunday Night
Low: 36 °F
SE 10kt
1-2ft
Monday
High: 44 °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: 10:24 pm AKDT Oct 28, 2026
Forecast Valid: 2am AKDT Oct 29, 2026-6pm AKST Nov 4, 2026

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Detailed Forecast

Synopsis: As a ridge of high pressure builds into the Panhandle, expect winds to decrease through the day Thursday. Friday, a front will approach Southeast Alaska and increase winds and seas, with the strongest winds expected near Cape Suckling Friday afternoon/evening. This will lead into a fairly active weather pattern.

Thursday

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

Thursday Night

Variable winds 5 kt or less. Mostly clear. 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. Mostly clear. Seas around 1 ft.

Saturday

ESE wind 5 to 10 kt. Mostly sunny. Seas 1 to 2 ft.

Saturday Night

ESE wind 5 to 10 kt. Rain likely, mainly after 4am. Seas around 2 ft.

Sunday

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

Sunday Night

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

Monday

Variable winds 5 kt or less. Rain likely. 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.