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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 43 °F
SSW 10kt
2ft
Tonight
Low: 37 °F
Light Wind
1-2ft
Thursday
High: 42 °F
Light Wind
< 1ft
Thursday Night
Low: 35 °F
Light Wind
< 1ft
Friday
High: 44 °F
Light Wind
< 1ft
Friday Night
Low: 35 °F
Light Wind
< 1ft
Saturday
High: 42 °F
Light Wind
< 1ft
Saturday Night
Low: 35 °F
Light Wind
< 1ft
Sunday
High: 43 °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: 10:17 am AKST Jan 14, 2026
Forecast Valid: 2pm AKST Jan 14, 2026-6pm AKST Jan 20, 2026

View Nearby Observations

Detailed Forecast

Synopsis: Winds across the region continue to trend downwards through Wednesday, with southwest winds of fresh to strong breezes continuing to impact the coastal waters. For the inside, southwesterly to southerly winds of moderate to strong breezes continue, with the strongest winds in Lynn Canal.

This Afternoon

SSW wind 5 to 10 kt. Showers, mainly after 3pm. Seas around 2 ft.

Tonight

Variable winds 5 kt or less. Showers, mainly before 3am. Seas 1 to 2 ft.

Thursday

Variable winds 5 kt or less. A slight chance of showers before 9am. Seas 1 ft or less.

Thursday Night

Variable winds 5 kt or less. A chance of rain and snow showers between midnight and 3am. Seas 1 ft or less.

Friday

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

Friday Night

Variable winds 5 kt or less. A chance of sprinkles between 9pm and 3am. Seas 1 ft or less.

Saturday

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

Saturday Night

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

Sunday

Variable winds 5 kt or less. Mostly sunny. 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.