For More Weather Information:

10NM SW Grand Portage MN

[NOTICE]

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Last Update: 9:56 pm CDT Mar 16, 2026
Forecast Valid: 11pm CDT Mar 16, 2026-6pm CDT Mar 23, 2026

Overnight

NNW wind 10 to 15 kt, with gusts as high as 30 kt. Mostly clear. Waves 1 ft or less.

Tuesday

NNW wind 5 to 10 kt becoming SW in the afternoon. Winds could gust as high as 15 kt. Increasing clouds. Waves 1 ft or less.

Tuesday Night

SSW wind 10 to 15 kt, with gusts as high as 25 kt. A chance of snow, mainly before 1am. Waves 1 ft building to 4 ft.

Wednesday

SW wind 10 to 15 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 2 to 3 ft.

Wednesday Night

WSW wind 5 to 10 kt becoming WNW after midnight. A slight chance of rain and snow before 4am, then a slight chance of snow. Waves 1 to 2 ft.

Thursday

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

Thursday Night

SSW wind 5 to 10 kt becoming NNE after midnight. A chance of snow, mainly after 1am. Waves 1 ft or less.

Friday

ENE wind around 10 kt, with gusts as high as 15 kt. A chance of snow. Waves around 2 ft.

Friday Night

E wind 10 to 20 kt becoming SE after midnight. A chance of snow. Waves 2 ft building to 6 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.