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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: 5:27 am CDT May 18, 2026
Forecast Valid: 6am CDT May 18, 2026-6pm CDT May 24, 2026

Today

NE wind 5 to 10 kt. A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 9am. Waves around 2 ft.

Tonight

NE wind 10 to 15 kt, with gusts as high as 20 kt. Showers and thunderstorms likely, then showers after 1am. Waves 1 to 2 ft.

Tuesday

N wind 10 to 15 kt becoming NW in the afternoon. Winds could gust as high as 25 kt. Showers likely, mainly before 10am. Waves 1 to 2 ft.

Tuesday Night

NW wind 5 to 10 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 ft or less.

Wednesday

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

Wednesday Night

SSW wind 5 to 10 kt becoming variable and less than 5 kt in the evening. Mostly clear. Waves 1 ft or less.

Thursday

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

Thursday Night

ESE wind 5 to 10 kt becoming S after midnight. Mostly cloudy. Waves 1 to 2 ft.

Friday

ESE wind 5 to 10 kt. A slight chance of showers. Waves 1 to 2 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.