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: 11:07 pm CDT Apr 20, 2026
Forecast Valid: 12am CDT Apr 21, 2026-6pm CDT Apr 27, 2026

Overnight

W wind 5 to 10 kt, with gusts as high as 15 kt. Mostly clear. Waves around 2 ft.

Tuesday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Tuesday Night

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

Wednesday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Wednesday Night

ENE wind around 10 kt. A chance of rain, mainly after 1am. Waves 1 to 2 ft.

Thursday

E wind around 10 kt, with gusts as high as 20 kt. A slight chance of rain after 1pm. Waves 2 to 3 ft.

Thursday Night

ENE wind 10 to 15 kt. Rain and possibly a thunderstorm. Waves 3 ft building to 6 ft.

Friday

E wind 10 to 15 kt becoming WNW in the afternoon. A chance of rain. Waves 6 ft subsiding to 3 ft.

Friday Night

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