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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: 12:11 am CDT Aug 18, 2026
Forecast Valid: 1am CDT Aug 18, 2026-6pm CDT Aug 24, 2026

Tuesday

WNW wind 5 to 10 kt becoming SW in the afternoon. Winds could gust as high as 20 kt. Mostly sunny. Waves 1 ft or less.

Tuesday Night

WSW wind 5 to 10 kt becoming NW after midnight. Partly cloudy. Waves 1 ft or less.

Wednesday

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

Wednesday Night

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

Thursday

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

Thursday Night

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

Friday

NNE wind 5 to 10 kt becoming ESE in the afternoon. A slight chance of showers after 1pm. Waves 1 ft or less.

Friday Night

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

Saturday

WNW wind 5 to 10 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.