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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: 4:46 pm CDT Aug 6, 2026
Forecast Valid: 5pm CDT Aug 6, 2026-6pm CDT Aug 13, 2026

Tonight

SW wind around 10 kt, with gusts as high as 20 kt. A slight chance of showers and thunderstorms after 5am. Waves 1 to 2 ft.

Friday

SW wind around 10 kt, with gusts as high as 15 kt. Showers and thunderstorms likely before 4pm, then a slight chance of showers. Waves around 1 ft.

Friday Night

Variable winds 5 kt or less. A slight chance of showers before 7pm. Waves 1 ft or less.

Saturday

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

Saturday Night

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

Sunday

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

Sunday Night

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

Monday

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

Monday Night

Variable winds 5 kt or less. Partly cloudy. 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.