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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

    • Tonight

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

      Low: 24 °F

      Light Wind
      < 1ft

    • Wednesday

      Wednesday:WSW wind 5 to 10 kt becoming ENE in the afternoon. Mostly cloudy. Waves 1 ft or less.

      High: 34 °F

      S 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:NE wind around 10 kt, with gusts as high as 20 kt. Cloudy. Waves 1 ft or less.

      Low: 20 °F

      NE 10kt
      < 1ft

    • Thursday

      Thursday:NE wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. Waves 1 ft or less.

      High: 28 °F

      NE 15kt
      < 1ft

    • Thursday Night

      Thursday Night:ENE wind 5 to 10 kt, with gusts as high as 20 kt. Cloudy. Waves 1 ft or less.

      Low: 25 °F

      ENE 10kt
      < 1ft

    • Friday

      Friday:Variable winds 5 kt or less. Rain likely, mainly after noon. Waves 1 ft or less.

      High: 38 °F

      Light Wind
      < 1ft

    • Friday Night

      Friday Night:NE wind 5 to 10 kt becoming NNW after midnight. Winds could gust as high as 20 kt. A chance of rain before midnight, then a chance of rain and snow. Some thunder is also possible. Waves 1 ft or less.

      Low: 28 °F

      NNW 10kt
      < 1ft

    • Saturday

      Saturday:NNW wind around 10 kt becoming WSW in the afternoon. Winds could gust as high as 25 kt. Mostly sunny. Waves 1 ft or less.

      High: 37 °F

      WSW 10kt
      < 1ft

    • Saturday Night

      Saturday Night:SW wind 10 to 20 kt, with gusts as high as 30 kt. Mostly cloudy. Waves 1 ft or less.

      Low: 29 °F

      SW 20kt
      < 1ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 5:06 pm CST Mar 3, 2026
Forecast Valid: 5pm CST Mar 3, 2026-6pm CDT Mar 10, 2026

View Nearby Observations

Detailed Forecast

Tonight
Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.
Wednesday
WSW wind 5 to 10 kt becoming ENE in the afternoon. Mostly cloudy. Waves 1 ft or less.
Wednesday Night
NE wind around 10 kt, with gusts as high as 20 kt. Cloudy. Waves 1 ft or less.
Thursday
NE wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. Waves 1 ft or less.
Thursday Night
ENE wind 5 to 10 kt, with gusts as high as 20 kt. Cloudy. Waves 1 ft or less.
Friday
Variable winds 5 kt or less. Rain likely, mainly after noon. Waves 1 ft or less.
Friday Night
NE wind 5 to 10 kt becoming NNW after midnight. Winds could gust as high as 20 kt. A chance of rain before midnight, then a chance of rain and snow. Some thunder is also possible. Waves 1 ft or less.
Saturday
NNW wind around 10 kt becoming WSW in the afternoon. Winds could gust as high as 25 kt. Mostly sunny. Waves 1 ft or less.
Saturday Night
SW wind 10 to 20 kt, with gusts as high as 30 kt. Mostly cloudy. Waves 1 ft or less.

Note...Wave height forecasts are for ice free areas.


*Notices:

  1. 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.
  2. 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.
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ABOUT THIS FORECAST

Point Forecast: 47.86°N 89.86°W
Last Update: 5:06 pm CST Mar 3, 2026
Forecast Valid: 5pm CST Mar 3, 2026-6pm CDT Mar 10, 2026
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