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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Tonight
Low: 49 °F
SE 10kt
2ft
Saturday
High: 56 °F
SE 10kt
2ft
Saturday Night
Low: 50 °F
SE 10kt
3ft
Sunday
High: 56 °F
SSE 10kt
2ft
Sunday Night
Low: 44 °F
SE 10kt
1-2ft
Monday
High: 52 °F
Light Wind
1ft
Monday Night
Low: 42 °F
Light Wind
1ft
Tuesday
High: 52 °F
ESE 10kt
2ft
Tuesday Night
Low: 41 °F
ESE 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: 4:01 pm AKDT Sep 18, 2026
Forecast Valid: 8pm AKDT Sep 18, 2026-6pm AKDT Sep 25, 2026

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Detailed Forecast

...SMALL CRAFT ADVISORY THROUGH THIS EVENING...

Synopsis: Southerly to easterly winds will continue tonight as the low lifts north into the Gulf through tonight. This has increased winds to around 30 to 35 kts and build seas to 8 to 14 ft for the Gulf and outer coastal water. The inner channels will see S winds around 15 to 25 kts. Elevated marine conditions continue into Saturday night and Sunday as another large and strong low lifts into the Gulf increasing to winds across the gulf and inner channels to around 30 to 40 kts.

Tonight

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

Saturday

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

Saturday Night

SE wind around 10 kt. Showers. The rain could be heavy at times. Seas around 3 ft.

Sunday

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

Sunday Night

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

Monday

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

Monday Night

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

Tuesday

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

Tuesday Night

ESE wind 5 to 10 kt. Showers. 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.