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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: 4:41 pm CDT May 13, 2026
Forecast Valid: 5pm CDT May 13, 2026-6pm CDT May 20, 2026

Tonight

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

Thursday

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

Thursday Night

ENE wind 10 to 15 kt becoming S after midnight. Showers likely, mainly after midnight. Waves 2 to 4 ft.

Friday

SSW wind 15 to 20 kt, with gusts as high as 30 kt. Mostly sunny. Waves around 4 ft.

Friday Night

W wind 10 to 15 kt, with gusts as high as 30 kt. Mostly clear. Waves 2 to 4 ft.

Saturday

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

Saturday Night

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

Sunday

ENE wind 5 to 10 kt increasing to 15 to 20 kt in the afternoon. A chance of showers. Waves 1 ft or less building to 3 ft.

Sunday Night

ENE wind 15 to 20 kt, with gusts as high as 30 kt. Showers and possibly a thunderstorm. Waves around 4 ft.

*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.