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Anchorage, AK Local Forecast Office

Chiswell Islands AK

Marine Point Forecast

[NOTICE]

This Afternoon
High: 54 °F
ENE 20kt
4-5ft
Tonight
Low: 54 °F
NNE 20kt
3-5ft
Monday
High: 57 °F
SW 10kt
2-4ft
Monday Night
Low: 54 °F
Light Wind
3-4ft
Tuesday
High: 56 °F
Light Wind
2-3ft
Tuesday Night
Low: 52 °F
E 10kt
3ft
Wednesday
High: 54 °F
⇑ENE 15kt
2-3ft
Wednesday Night
Low: 51 °F
ENE 15kt
3-4ft
Thursday
High: 57 °F
NE 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: 6:57 am AKDT Jul 5, 2026
Forecast Valid: 12pm AKDT Jul 5, 2026-6pm AKDT Jul 11, 2026

View Nearby Observations

Detailed Forecast

Synopsis: A 1009 mb 40 nm SE of Kodiak City moves east into the Gulf and merges with another low moving up from the North Pacific, reaching 210 nm SE of Middleton Island at 1005 mb by Mon morning. The low continues to move into the eastern Gulf, exiting 210 nm SW of Sitka at 1007 mb by Tue morning.

This Afternoon

ENE wind around 20 kt. Rain. The rain could be heavy at times. Seas 4 to 5 ft.

Tonight

NNE wind 15 to 20 kt. Rain, mainly before 1am. Seas 3 to 5 ft.

Monday

N wind 5 to 10 kt becoming SW in the afternoon. Isolated showers before 7am. Seas 2 to 4 ft.

Monday Night

Variable winds 5 kt or less. Partly cloudy. Seas 3 to 4 ft.

Tuesday

Variable winds 5 kt or less. Mostly sunny. Seas 2 to 3 ft.

Tuesday Night

E wind 5 to 10 kt. Mostly cloudy. Seas around 3 ft.

Wednesday

ENE wind 5 to 10 kt increasing to 10 to 15 kt in the morning. Showers likely, mainly after 4pm. Seas 2 to 3 ft.

Wednesday Night

ENE wind around 15 kt, with gusts as high as 20 kt. Showers likely. Seas 3 to 4 ft.

Thursday

NE wind around 10 kt becoming WNW in the morning. A chance of showers. 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.