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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

This Afternoon
High: 25 °F
NNW 10kt
< 1ft
Tonight
Low: 15 °F
NNW 15kt
< 1ft

Small Craft Advisory
Sunday
High: 18 °F
N 15kt
< 1ft

Small Craft Advisory
Sunday Night
Low: -4 °F
N 15kt
< 1ft

Small Craft Advisory
Monday
High: 12 °F
N 10kt
< 1ft

Small Craft Advisory
Monday Night
Low: 7 °F
⇑SSE 15kt
< 1ft
Tuesday
High: 24 °F
SSE 15kt
< 1ft
Tuesday Night
Low: 14 °F
ENE 10kt
< 1ft
Wednesday
High: 21 °F
NW 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: 12:47 pm CST Feb 21, 2026
Forecast Valid: 2pm CST Feb 21, 2026-6pm CST Feb 27, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

NNW wind around 10 kt, with gusts as high as 15 kt. A chance of flurries. Waves 1 ft or less.

Tonight

NNW wind 10 to 15 kt, with gusts as high as 25 kt. A chance for flurries, then a slight chance of snow showers between midnight and 2am, and then a chance for flurries again. Waves 1 ft or less.

Sunday

N wind 10 to 15 kt, with gusts as high as 25 kt. A chance for flurries, then a slight chance of snow showers between noon and 5pm, and then a chance for flurries again. Waves 1 ft or less.

Sunday Night

N wind 10 to 15 kt, with gusts as high as 30 kt. Partly cloudy. Waves 1 ft or less.

Monday

N wind 5 to 10 kt becoming ESE in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Waves 1 ft or less.

Monday Night

ESE wind 5 to 10 kt becoming SSE 10 to 15 kt after midnight. Winds could gust as high as 25 kt. A chance of snow after midnight. Waves 1 ft or less.

Tuesday

SSE wind 10 to 15 kt becoming E in the afternoon. Winds could gust as high as 25 kt. Snow likely, mainly before noon. Waves 1 ft or less.

Tuesday Night

ENE wind 5 to 10 kt becoming NW in the evening. Winds could gust as high as 20 kt. A slight chance of snow. Waves 1 ft or less.

Wednesday

NW wind around 10 kt, with gusts as high as 20 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.