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: 6:26 am CDT Sep 2, 2026
Forecast Valid: 11am CDT Sep 2, 2026-6pm CDT Sep 8, 2026

Today

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

Tonight

Variable winds 5 kt or less. Patchy fog after 5am. Waves 1 ft or less.

Thursday

NNE wind 5 to 10 kt becoming E in the morning. Patchy fog before 7am. Waves 1 ft or less.

Thursday Night

ENE wind 5 to 10 kt. A slight chance of showers after 1am. Waves 1 ft or less.

Friday

ENE wind 10 to 15 kt. Partly sunny. Waves 1 to 2 ft.

Friday Night

NE wind 5 to 10 kt, with gusts as high as 20 kt. Mostly cloudy. Waves around 1 ft.

Saturday

E wind 5 to 10 kt. Partly sunny. Waves 1 ft or less.

Saturday Night

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

Sunday

Variable winds 5 kt or less. A chance of showers, with thunderstorms also possible after 1pm. 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.