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: 1:22 pm CDT Sep 2, 2026
Forecast Valid: 6pm CDT Sep 2, 2026-6pm CDT Sep 9, 2026

Tonight

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

Thursday

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

Thursday Night

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

Friday

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

Friday Night

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

Sunday

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

Sunday Night

ESE wind 5 to 10 kt becoming NNE in the evening. A chance of showers, with thunderstorms also possible after 1am. 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.