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Anchorage, AK Local Forecast Office

5NM S Chiswell Islands AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 33 °F
NNE 15kt
8ft
Tonight
Low: 32 °F
NE 15kt
3-5ft
Tuesday
High: 32 °F
NE 10kt
3-5ft
Tuesday Night
Low: 31 °F
NE 10kt⇓
5ft
Wednesday
High: 32 °F
⇑NNE 20kt
5-6ft
Wednesday Night
Low: 30 °F
NNE 15kt
4-5ft
Thursday
High: 32 °F
NNE 10kt
4-5ft
Thursday Night
Low: 31 °F
NNE 15kt
4ft
Friday
High: 36 °F
NNW 10kt
3-4ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:59 pm AKST Dec 8, 2025
Forecast Valid: 3pm AKST Dec 8, 2025-6pm AKST Dec 14, 2025

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY TONIGHT...

Synopsis: A 987 mb low 230 nm SE of Old Harbor will weaken and move into the north Pacific Tue morning. A trough moving south through the state will generate a new 1007 mb low 120 nm S of Seward Wed afternoon.

This Afternoon

NNE wind around 15 kt. Sunny. Seas around 8 ft.

Tonight

NE wind 10 to 15 kt. Mostly clear. Seas 3 to 5 ft.

Tuesday

NE wind around 10 kt. A slight chance of snow showers after 3pm. Seas 3 to 5 ft.

Tuesday Night

NE wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Mostly cloudy. Seas around 5 ft.

Wednesday

NNE wind 5 to 10 kt increasing to 15 to 20 kt in the afternoon. Mostly sunny. Seas 5 to 6 ft.

Wednesday Night

NNE wind 10 to 15 kt. Mostly clear. Seas 4 to 5 ft.

Thursday

NNE wind 5 to 10 kt. Sunny. Seas 4 to 5 ft.

Thursday Night

NE wind 5 to 15 kt becoming N after midnight. Mostly clear. Seas around 4 ft.

Friday

NNW wind around 10 kt. Sunny. Seas 3 to 4 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.