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: 5:41 am CDT Jul 5, 2026
Forecast Valid: 6am CDT Jul 5, 2026-6pm CDT Jul 11, 2026

Today

ENE wind 5 to 10 kt. Sunny. Waves 1 ft or less.

Tonight

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

Monday

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

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Waves 1 ft or less.

Tuesday

Variable winds 5 kt or less. A chance of showers before 1pm. Waves 1 ft or less.

Tuesday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms after 1am. Waves 1 ft or less.

Wednesday

Variable winds 5 kt or less. Showers likely, with thunderstorms also possible after 1pm. Waves 1 ft or less.

Wednesday 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.

Thursday

N wind 5 to 10 kt becoming S in the afternoon. Mostly sunny. 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.