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: 7:56 pm CDT Aug 7, 2026
Forecast Valid: 8pm CDT Aug 7, 2026-6pm CDT Aug 14, 2026

Tonight

SW wind 5 to 10 kt becoming NW in the evening. Winds could gust as high as 15 kt. Mostly clear. Waves 1 ft or less.

Saturday

W wind 5 to 15 kt becoming SW in the afternoon. Mostly sunny. Waves 1 to 2 ft.

Saturday Night

WSW wind 5 to 10 kt becoming WNW in the evening. A chance of showers after 1am. Waves 1 ft or less.

Sunday

W wind 5 to 10 kt becoming SSW in the afternoon. A slight chance of showers before 1pm. Waves 1 ft or less.

Sunday Night

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

Monday

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

Monday Night

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

Tuesday

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

Tuesday 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.