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

This Afternoon

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

Tonight

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 10 to 15 kt. A chance of rain after 1am. Waves 1 to 2 ft.

Thursday

ENE wind 10 to 15 kt, with gusts as high as 20 kt. A slight chance of rain after 1pm. Waves 3 to 4 ft.

Thursday Night

ENE wind around 15 kt, with gusts as high as 20 kt. Rain likely and possibly a thunderstorm, then rain after 1am. Waves 4 to 5 ft.

Friday

ENE wind 10 to 15 kt becoming N in the afternoon. Rain likely and possibly a thunderstorm before 1pm, then a chance of rain. Waves 4 to 5 ft.

Friday Night

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

Saturday

NNW wind 10 to 15 kt becoming SSW in the afternoon. 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.