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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: 8:16 pm CDT Jul 21, 2026
Forecast Valid: 9pm CDT Jul 21, 2026-6pm CDT Jul 28, 2026

Tonight

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

Wednesday

NW wind 5 to 10 kt becoming WSW in the afternoon. Winds could gust as high as 15 kt. Mostly sunny. Waves 1 ft or less.

Wednesday Night

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

Thursday

SW wind 5 to 15 kt. Sunny. Waves 1 to 2 ft.

Thursday Night

WSW wind 5 to 10 kt. A chance of showers and thunderstorms before 4am, then a slight chance of showers. Waves 1 to 2 ft.

Friday

SW wind 10 to 15 kt, with gusts as high as 25 kt. Mostly sunny. Waves 1 to 2 ft.

Friday Night

SW wind around 15 kt, with gusts as high as 30 kt. A chance of showers and thunderstorms after 1am. Waves around 2 ft.

Saturday

SW wind 10 to 15 kt, with gusts as high as 30 kt. A chance of showers and thunderstorms, mainly before 1pm. Waves 2 to 3 ft.

Saturday Night

Variable winds 5 kt or less. A slight 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.