For More Weather Information:

21NM E Grand Portage MN

[NOTICE]

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Last Update: 12:03 pm CDT Oct 11, 2026
Forecast Valid: 12pm CDT Oct 11, 2026-6pm CDT Oct 17, 2026

This Afternoon

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

Tonight

NNE wind 10 to 15 kt, with gusts as high as 30 kt. A chance of showers, mainly after midnight. Waves 1 ft or less.

Columbus Day

NE wind 15 to 20 kt, with gusts as high as 30 kt. Showers, mainly before 4pm. Waves 1 ft or less.

Monday Night

NE wind around 15 kt, with gusts as high as 25 kt. Showers, mainly after 7pm. Waves 1 ft or less.

Tuesday

NNE wind 5 to 10 kt, with gusts as high as 15 kt. A chance of showers before 1pm. Waves 1 ft or less.

Tuesday Night

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

Wednesday

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

Wednesday Night

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

Thursday

ESE wind 5 to 10 kt becoming S in the afternoon. A chance of showers. 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.