For More Weather Information:

10NM SW Grand Portage MN

[NOTICE]

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Last Update: 6:06 am CDT Aug 4, 2026
Forecast Valid: 9am CDT Aug 4, 2026-6pm CDT Aug 10, 2026

Today

W wind 10 to 15 kt. Mostly cloudy, then gradually becoming sunny. Waves 1 to 2 ft.

Tonight

WNW wind 5 to 10 kt. Partly cloudy. Waves 1 ft or less.

Wednesday

W wind 5 to 10 kt becoming SW in the morning. Winds could gust as high as 15 kt. Mostly sunny. Waves 1 ft or less.

Wednesday Night

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

Thursday

SW wind 5 to 15 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 to 2 ft.

Thursday Night

SW wind 5 to 10 kt, with gusts as high as 15 kt. Partly cloudy. Waves around 1 ft.

Friday

SW wind 10 to 15 kt. A slight chance of showers and thunderstorms after 1pm. Waves around 1 ft.

Friday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms before 1am, then a slight chance of showers. Waves 1 ft or less.

Saturday

WNW wind 5 to 10 kt becoming SW in the afternoon. Winds could gust as high as 15 kt. 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.