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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

Today
High: 24 °F
NW 10kt
< 1ft

Small Craft Advisory
Tonight
Low: 14 °F
W 15kt
< 1ft
Monday
High: 23 °F
WSW 15kt
1-3ft
Monday Night
Low: 10 °F
WNW 10kt
1-3ft
Tuesday
High: 27 °F
SW 10kt
< 1ft
Tuesday Night
Low: 13 °F
SW 15kt
1-2ft
Wednesday
High: 21 °F
NW 15kt
< 1ft
Wednesday Night
Low: 1 °F
NW 15kt
< 1ft
Thursday
High: 19 °F
WSW 15kt
1-2ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:41 am CST Nov 30, 2025
Forecast Valid: 11am CST Nov 30, 2025-6pm CST Dec 6, 2025

View Nearby Observations

Detailed Forecast

Today

NW wind around 10 kt, with gusts as high as 20 kt. A chance of flurries before 1pm. Waves 1 ft or less.

Tonight

W wind 10 to 15 kt, with gusts as high as 20 kt. Partly cloudy. Waves 1 ft or less.

Monday

WSW wind 10 to 15 kt, with gusts as high as 20 kt. A chance of flurries between 11am and 4pm, then a slight chance of snow showers after 4pm. Waves 1 to 3 ft.

Monday Night

WNW wind 5 to 10 kt, with gusts as high as 20 kt. A slight chance of snow before midnight. Waves 1 to 3 ft.

Tuesday

WNW wind 5 to 10 kt becoming SW in the afternoon. Winds could gust as high as 20 kt. Partly sunny. Waves 1 ft or less.

Tuesday Night

SW wind 10 to 15 kt becoming NW after midnight. Winds could gust as high as 20 kt. Snow likely, mainly after midnight. Waves 1 to 2 ft.

Wednesday

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

Wednesday Night

NW wind around 15 kt, with gusts as high as 30 kt. Partly cloudy. Waves 1 ft or less.

Thursday

NW wind 10 to 15 kt becoming WSW in the afternoon. Winds could gust as high as 30 kt. Mostly sunny. Waves 1 to 2 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.