For More Weather Information:

Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]

Overnight
Low: 51 °F
Light Wind
1ft
Monday
High: 71 °F
Light Wind
1ft
Monday Night
Low: 53 °F
Light Wind
1ft
Tuesday
High: 69 °F
Light Wind
1ft
Tuesday Night
Low: 53 °F
Light Wind
1-2ft
Wednesday
High: 65 °F
Light Wind
1-2ft
Wednesday Night
Low: 52 °F
NW 10kt
1-2ft
Thursday
High: 63 °F
Light Wind
1ft
Thursday Night
Low: 52 °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: 2:11 pm AKDT Jul 19, 2026
Forecast Valid: 12am AKDT Jul 20, 2026-6pm AKDT Jul 26, 2026

View Nearby Observations

Detailed Forecast

Synopsis: High pressure in the Gulf of Alaska will persist for much of the week, bringing broad westerly to northwesterly winds and local sea breezes. A brief southeasterly shift Monday night for the northeast coast may bring showers, low clouds and low visibility. Winds for the southern coastal waters and near Cape Spencer into Cross Sound could become strong with elevated seas by later Tuesday or Wednesday as the gradient tightens.

Overnight

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

Monday

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

Monday Night

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

Tuesday

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

Tuesday Night

Variable winds 5 kt or less. Partly cloudy. Seas 1 to 2 ft.

Wednesday

Variable winds 5 kt or less. Mostly sunny. Seas 1 to 2 ft.

Wednesday Night

NW wind 5 to 10 kt. Mostly cloudy. Seas 1 to 2 ft.

Thursday

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

Thursday Night

Variable winds 5 kt or less. A chance of showers. 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.