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10NM SW Grand Portage MN

[NOTICE]

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Last Update: 9:41 pm CDT Aug 22, 2026
Forecast Valid: 11pm CDT Aug 22, 2026-6pm CDT Aug 29, 2026

Overnight

N wind 5 to 10 kt. Mostly clear. Waves 1 ft or less.

Sunday

NNW wind 5 to 10 kt becoming S in the afternoon. Mostly sunny. Waves 1 ft or less.

Sunday Night

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

Monday

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

Monday Night

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

Tuesday

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

Tuesday Night

Variable winds 5 kt or less. Showers likely and possibly a thunderstorm. Waves 1 ft or less.

Wednesday

N wind 5 to 10 kt. Showers likely, with thunderstorms also possible after 1pm. Waves 1 ft or less.

Wednesday Night

NNW wind 5 to 10 kt. Mostly 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.