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: 2:01 pm CDT Mar 18, 2026
Forecast Valid: 3pm CDT Mar 18, 2026-6pm CDT Mar 25, 2026

This Afternoon

WSW wind around 10 kt, with gusts as high as 15 kt. Partly sunny. Waves 1 ft or less.

Tonight

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

Thursday

Variable winds 5 kt or less. A chance of snow after 4pm. Waves 1 ft or less.

Thursday Night

SSW wind 5 to 10 kt becoming SSE in the evening. A chance of snow before 9pm, then a chance of sleet between 9pm and 10pm. 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

NW wind 5 to 10 kt becoming ENE in the afternoon. Winds could gust as high as 20 kt. A chance of snow, mainly after 1pm. Waves 1 ft or less.

Saturday Night

NE wind 10 to 15 kt, with gusts as high as 25 kt. A chance of snow. Waves 1 ft or less.

Sunday

NE wind 10 to 15 kt, with gusts as high as 25 kt. A slight chance of snow. 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.