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: 1:36 am CDT Aug 13, 2026
Forecast Valid: 1am CDT Aug 13, 2026-6pm CDT Aug 19, 2026

Thursday

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

Thursday Night

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

Friday

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

Friday Night

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

Saturday

E wind 5 to 10 kt. A chance of showers. Waves 1 ft or less.

Saturday Night

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

Sunday

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

Sunday Night

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

Monday

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