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Juneau, AK Local Forecast Office

Petersburg AK

Marine Point Forecast

[NOTICE]
    • Overnight

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

      Low: 54 °F

      Light Wind
      1ft

    • Thursday

      Thursday:Variable winds 5 kt or less. A chance of showers, mainly after 4pm.   Seas around 1 ft.

      High: 64 °F

      Light Wind
      1ft

    • Thursday Night

      Thursday Night:Variable winds 5 kt or less. Showers, mainly after 7pm.   Seas 1 ft or less.

      Low: 53 °F

      Light Wind
      < 1ft

    • Friday

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

      High: 58 °F

      Light Wind
      1ft

    • Friday Night

      Friday Night:Variable winds 5 kt or less. Showers likely, mainly before 7pm.   Seas around 1 ft.

      Low: 48 °F

      Light Wind
      1ft

    • Saturday

      Saturday:Variable winds 5 kt or less. A chance of showers after 10am.   Seas 1 ft or less.

      High: 64 °F

      Light Wind
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. A chance of showers.   Seas 1 ft or less.

      Low: 51 °F

      Light Wind
      < 1ft

    • Sunday

      Sunday:Variable winds 5 kt or less. Showers.   Seas 1 ft or less.

      High: 62 °F

      Light Wind
      < 1ft

    • Sunday Night

      Sunday Night:Variable winds 5 kt or less. Showers.   Seas 1 ft or less.

      Low: 50 °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: 9:55 pm AKDT Jul 22, 2026
Forecast Valid: 12am AKDT Jul 23, 2026-6pm AKDT Jul 29, 2026

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Detailed Forecast


Synopsis: High pressure in the Gulf of Alaska will strengthen overnight, bringing strong breezes to both outer and inner waters, expected to peak Thursday night. Weak low pressure then moves in through Friday displacing the ridge, causing winds to diminish across the region.

Overnight
Variable winds 5 kt or less. Mostly cloudy. Seas around 1 ft.
Thursday
Variable winds 5 kt or less. A chance of showers, mainly after 4pm. Seas around 1 ft.
Thursday Night
Variable winds 5 kt or less. Showers, mainly after 7pm. Seas 1 ft or less.
Friday
Variable winds 5 kt or less. Showers. Seas around 1 ft.
Friday Night
Variable winds 5 kt or less. Showers likely, mainly before 7pm. Seas around 1 ft.
Saturday
Variable winds 5 kt or less. A chance of showers after 10am. Seas 1 ft or less.
Saturday Night
Variable winds 5 kt or less. A chance of showers. Seas 1 ft or less.
Sunday
Variable winds 5 kt or less. Showers. Seas 1 ft or less.
Sunday Night
Variable winds 5 kt or less. Showers. Seas 1 ft or less.

*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 56.82°N 133°W
Last Update: 9:55 pm AKDT Jul 22, 2026
Forecast Valid: 12am AKDT Jul 23, 2026-6pm AKDT Jul 29, 2026
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