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: 6:10 pm CDT May 20, 2025
Forecast Valid: 6pm CDT May 20, 2025-6pm CDT May 27, 2025

Tonight

ENE wind 15 to 20 kt, with gusts as high as 35 kt. Cloudy. Waves 3 to 4 ft.

Wednesday

ENE wind 15 to 20 kt, with gusts as high as 30 kt. Mostly cloudy. Waves 2 to 4 ft.

Wednesday Night

NNE wind 5 to 10 kt, with gusts as high as 15 kt. Partly cloudy. Waves 1 to 2 ft.

Thursday

NNE wind 5 to 10 kt, with gusts as high as 20 kt. Partly sunny. Waves 1 ft or less.

Thursday Night

N wind 5 to 10 kt, with gusts as high as 15 kt. Mostly cloudy. Waves 1 ft or less.

Friday

N wind 5 to 10 kt becoming SW in the afternoon. Winds could gust as high as 15 kt. Partly sunny. Waves 1 ft or less.

Friday Night

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

Saturday

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

Saturday Night

Variable winds 5 kt or less. Partly cloudy. 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.