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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Thursday
High: 42 °F
Light Wind
< 1ft
Thursday Night
Low: 37 °F
Light Wind
< 1ft
Friday
High: 44 °F
Light Wind
< 1ft
Friday Night
Low: 35 °F
Light Wind
< 1ft
Saturday
High: 43 °F
Light Wind
< 1ft
Saturday Night
Low: 36 °F
Light Wind
< 1ft
Sunday
High: 43 °F
Light Wind
< 1ft
Sunday Night
Low: 35 °F
Light Wind
< 1ft
M.L.King Day
High: 42 °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: 2:33 pm AKST Jan 14, 2026
Forecast Valid: 1am AKST Jan 15, 2026-6pm AKST Jan 21, 2026

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Detailed Forecast

Synopsis: Winds continue to diminish tonight for the gulf bringing a short break. Gale force easterly winds build along Cape St. Elias Thursday morning, reaching storm force along Cape Suckling Thursday night.

Thursday

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

Thursday Night

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

Friday

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

Friday Night

Variable winds 5 kt or less. Patchy fog after midnight. Seas 1 ft or less.

Saturday

Variable winds 5 kt or less. Areas of dense fog. Seas 1 ft or less.

Saturday Night

Variable winds 5 kt or less. Areas of dense fog. Seas 1 ft or less.

Sunday

Variable winds 5 kt or less. Areas of fog before noon, then Patchy fog after 3pm. Seas 1 ft or less.

Sunday Night

Variable winds 5 kt or less. Areas of fog after midnight. Seas 1 ft or less.

M.L.King Day

Variable winds 5 kt or less. Areas of fog before 9am, then Patchy fog after 3pm. 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.