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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Washington's Birthday
High: 40 °F
Light Wind
< 1ft
Monday Night
Low: 20 °F
Light Wind
< 1ft
Tuesday
High: 31 °F
⇑ENE 20kt
< 1ft
Tuesday Night
Low: 25 °F
⇑ENE 30kt
< 1ft
Wednesday
High: 29 °F
ENE 30kt
< 1ft
Wednesday Night
Low: 25 °F
ENE 25kt
< 1ft
Thursday
High: 28 °F
ENE 15kt
< 1ft
Thursday Night
Low: 21 °F
NE 15kt
< 1ft
Friday
High: 27 °F
NE 10kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 12:56 am CST Feb 16, 2026
Forecast Valid: 2am CST Feb 16, 2026-6pm CST Feb 22, 2026

View Nearby Observations

Detailed Forecast

Washington's Birthday

Variable winds 5 kt or less. Mostly cloudy, then gradually becoming sunny. Waves 1 ft or less.

Monday Night

Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Tuesday

ENE wind 5 to 10 kt increasing to 15 to 20 kt in the afternoon. Winds could gust as high as 35 kt. Partly sunny. Waves 1 ft or less.

Tuesday Night

ENE wind 20 to 25 kt increasing to 25 to 30 kt after midnight. Winds could gust as high as 50 kt. Snow likely, mainly after midnight. The snow could be heavy at times. Waves 1 ft or less.

Wednesday

ENE wind 25 to 30 kt, with gusts as high as 50 kt. Snow. The snow could be heavy at times. Waves 1 ft or less.

Wednesday Night

ENE wind 15 to 25 kt, with gusts as high as 50 kt. Snow likely. Waves 1 ft or less.

Thursday

ENE wind around 15 kt, with gusts as high as 30 kt. A chance of snow. Waves 1 ft or less.

Thursday Night

NE wind 10 to 15 kt, with gusts as high as 30 kt. A chance of snow. Waves 1 ft or less.

Friday

NE wind around 10 kt, with gusts as high as 25 kt. A slight chance of snow. Waves 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.