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: 1:11 pm CDT Sep 4, 2026
Forecast Valid: 1pm CDT Sep 4, 2026-6pm CDT Sep 10, 2026

This Afternoon

ENE wind around 10 kt, with gusts as high as 20 kt. A chance of showers, mainly before 3pm. Waves 1 ft or less.

Tonight

NE wind 5 to 10 kt. Mostly cloudy. Waves 1 ft or less.

Saturday

Variable winds 5 kt or less. Partly sunny, then gradually becoming sunny. Waves 1 ft or less.

Saturday Night

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

Sunday

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

Sunday Night

Variable winds 5 kt or less. A chance of showers after 1am. Waves 1 ft or less.

Labor Day

ENE wind 5 to 15 kt, with gusts as high as 25 kt. A chance of showers. Waves 1 ft or less.

Monday Night

ENE wind around 15 kt becoming SE after midnight. Winds could gust as high as 25 kt. Showers likely. Waves 1 ft or less.

Tuesday

SSE wind around 15 kt, with gusts as high as 30 kt. 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.