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Duluth, MN Local Forecast Office

Grand Portage MN

Marine Point Forecast

[NOTICE]

Today
High: 14 °F
NNW 10kt
< 1ft
Tonight
Low: -11 °F
N 15kt
< 1ft
M.L.King Day
High: -1 °F
NW 15kt
< 1ft
Monday Night
Low: -8 °F
WNW 10kt
< 1ft
Tuesday
High: 9 °F
Light Wind
< 1ft
Tuesday Night
Low: 2 °F
Light Wind
< 1ft
Wednesday
High: 11 °F
NW 10kt
< 1ft
Wednesday Night
Low: -6 °F
NW 10kt
< 1ft
Thursday
High: 4 °F
Light Wind
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 6:37 am CST Jan 18, 2026
Forecast Valid: 8am CST Jan 18, 2026-6pm CST Jan 24, 2026

View Nearby Observations

Detailed Forecast

Today

NNW wind 5 to 10 kt, with gusts as high as 20 kt. Snow, mainly before 5pm. Waves 1 ft or less.

Tonight

N wind 10 to 15 kt, with gusts as high as 35 kt. A chance of snow before 10pm, then a slight chance of snow between 10pm and 11pm, then patchy blowing snow after 11pm. Waves 1 ft or less.

M.L.King Day

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

Monday Night

WNW wind 5 to 10 kt, with gusts as high as 25 kt. Mostly cloudy. Waves 1 ft or less.

Tuesday

Variable winds 5 kt or less. Winds could gust as high as 20 kt. Mostly sunny. Waves 1 ft or less.

Tuesday Night

Variable winds 5 kt or less. Winds could gust as high as 15 kt. Mostly cloudy. Waves 1 ft or less.

Wednesday

NW wind 5 to 10 kt, with gusts as high as 20 kt. A slight chance of snow. Waves 1 ft or less.

Wednesday Night

NW wind 5 to 10 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 ft or less.

Thursday

Variable winds 5 kt or less. Winds could gust as high as 20 kt. Partly sunny. 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.