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: 8:11 am CDT May 21, 2026
Forecast Valid: 9am CDT May 21, 2026-6pm CDT May 27, 2026

Today

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

Tonight

NE wind 5 to 10 kt. Increasing clouds. Waves 1 ft or less.

Friday

ENE wind 5 to 15 kt. Mostly sunny. Waves 1 to 2 ft.

Friday Night

ENE wind 10 to 15 kt, with gusts as high as 25 kt. A chance of showers after 1am. Waves 2 to 3 ft.

Saturday

ENE wind around 10 kt, with gusts as high as 20 kt. Showers. Waves around 2 ft.

Saturday Night

Variable winds 5 kt or less. A slight chance of showers before 1am. Waves 1 to 2 ft.

Sunday

W wind 5 to 10 kt becoming SW in the afternoon. Partly sunny. Waves 1 ft or less.

Sunday Night

Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

Memorial Day

SSW wind 5 to 10 kt. Mostly 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.