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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:WSW wind around 20 km/h, with gusts as high as 30 km/h. A slight chance of showers after 4pm.   Waves 1 m or less.

      High: 18 °C

      WSW 20km/h
      < 1m

    • Tonight

      Tonight:W wind 10 to 15 km/h, with gusts as high as 25 km/h. Partly cloudy. Waves 1 m or less.

      Low: 12 °C

      W 15km/h
      < 1m

    • Wednesday

      Wednesday:W wind 5 to 10 km/h becoming S in the afternoon. Mostly sunny. Waves 1 m or less.

      High: 17 °C

      S 10km/h
      < 1m

    • Wednesday Night

      Wednesday Night:SW wind 5 to 10 km/h becoming N after midnight. A slight chance of showers after 1am.   Waves 1 m or less.

      Low: 9 °C

      SW 10km/h
      < 1m

    • Juneteenth

      Juneteenth:NNE wind 10 to 15 km/h becoming E in the afternoon. Winds could gust as high as 25 km/h. A chance of showers before 8am, then showers likely and possibly a thunderstorm between 8am and 1pm, then showers likely after 1pm.   Waves 1 m or less.

      High: 14 °C

      E 15km/h
      < 1m

    • Thursday Night

      Thursday Night:NNE wind 5 to 10 km/h. A chance of showers.   Waves 1 m or less.

      Low: 7 °C

      NNE 10km/h
      < 1m

    • Friday

      Friday:ENE wind 10 to 15 km/h, with gusts as high as 25 km/h. A chance of showers.   Waves 1 m or less.

      High: 14 °C

      ENE 15km/h
      < 1m

    • Friday Night

      Friday Night:NE wind 10 to 15 km/h, with gusts as high as 25 km/h. Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.   Waves 1 m or less.

      Low: 8 °C

      NE 15km/h
      < 1m

    • Saturday

      Saturday:NE wind around 15 km/h, with gusts as high as 25 km/h. A slight chance of showers before 1pm.   Waves 1 m or less.

      High: 16 °C

      NE 15km/h
      < 1m


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 12:56 pm CDT Jun 17, 2025
Forecast Valid: 1pm CDT Jun 17, 2025-6pm CDT Jun 23, 2025

View Nearby Observations

Detailed Forecast

This Afternoon
WSW wind around 20 km/h, with gusts as high as 30 km/h. A slight chance of showers after 4pm. Waves 1 m or less.
Tonight
W wind 10 to 15 km/h, with gusts as high as 25 km/h. Partly cloudy. Waves 1 m or less.
Wednesday
W wind 5 to 10 km/h becoming S in the afternoon. Mostly sunny. Waves 1 m or less.
Wednesday Night
SW wind 5 to 10 km/h becoming N after midnight. A slight chance of showers after 1am. Waves 1 m or less.
Juneteenth
NNE wind 10 to 15 km/h becoming E in the afternoon. Winds could gust as high as 25 km/h. A chance of showers before 8am, then showers likely and possibly a thunderstorm between 8am and 1pm, then showers likely after 1pm. Waves 1 m or less.
Thursday Night
NNE wind 5 to 10 km/h. A chance of showers. Waves 1 m or less.
Friday
ENE wind 10 to 15 km/h, with gusts as high as 25 km/h. A chance of showers. Waves 1 m or less.
Friday Night
NE wind 10 to 15 km/h, with gusts as high as 25 km/h. Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Waves 1 m or less.
Saturday
NE wind around 15 km/h, with gusts as high as 25 km/h. A slight chance of showers before 1pm. Waves 1 m or less.

*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: 12:56 pm CDT Jun 17, 2025
Forecast Valid: 1pm CDT Jun 17, 2025-6pm CDT Jun 23, 2025
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