Hazardous Weather Conditions

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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:SW wind around 15 km/h, with gusts as high as 25 km/h. A slight chance of showers after 5pm.  Areas of smoke.  Waves 1 m or less.

      High: 21 °C

      SW 15km/h
      < 1m

    • Tonight

      Tonight:W wind around 10 km/h becoming ENE after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am.  Areas of smoke.  Waves 1 m or less.

      Low: 14 °C

      NE 10km/h
      < 1m

    • Tuesday

      Tuesday:ENE wind 5 to 10 km/h becoming WSW in the afternoon. Showers and thunderstorms likely, mainly before 9am, then showers likely and possibly a thunderstorm after 4pm.  Areas of smoke before 3pm.  Waves 1 m or less.

      High: 22 °C

      ENE 10km/h
      < 1m

    • Tuesday Night

      Tuesday Night:NE wind 10 to 20 km/h, with gusts as high as 30 km/h. Showers and possibly a thunderstorm.   Waves 1 m or less.

      Low: 12 °C

      NE 20km/h
      < 1m

    • Wednesday

      Wednesday:NE wind 15 to 25 km/h, with gusts as high as 35 km/h. Showers likely, mainly before 1pm.   Waves 1 m or less.

      High: 16 °C

      NE 25km/h
      < 1m

    • Wednesday Night

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

      Low: 12 °C

      N 15km/h
      < 1m

    • Thursday

      Thursday:N wind around 15 km/h becoming S in the afternoon. Winds could gust as high as 25 km/h. Sunny. Waves 1 m or less.

      High: 19 °C

      SSE 15km/h
      < 1m

    • Thursday Night

      Thursday Night:W wind around 10 km/h. Mostly clear. Waves 1 m or less.

      Low: 13 °C

      W 10km/h
      < 1m

    • Friday

      Friday:W wind around 10 km/h becoming SSW in the afternoon. Mostly sunny. Waves 1 m or less.

      High: 21 °C

      SSW 10km/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: 1:56 pm CDT Jul 14, 2025
Forecast Valid: 3pm CDT Jul 14, 2025-6pm CDT Jul 21, 2025

View Nearby Observations

Detailed Forecast

This Afternoon
SW wind around 15 km/h, with gusts as high as 25 km/h. A slight chance of showers after 5pm. Areas of smoke. Waves 1 m or less.
Tonight
W wind around 10 km/h becoming ENE after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Areas of smoke. Waves 1 m or less.
Tuesday
ENE wind 5 to 10 km/h becoming WSW in the afternoon. Showers and thunderstorms likely, mainly before 9am, then showers likely and possibly a thunderstorm after 4pm. Areas of smoke before 3pm. Waves 1 m or less.
Tuesday Night
NE wind 10 to 20 km/h, with gusts as high as 30 km/h. Showers and possibly a thunderstorm. Waves 1 m or less.
Wednesday
NE wind 15 to 25 km/h, with gusts as high as 35 km/h. Showers likely, mainly before 1pm. Waves 1 m or less.
Wednesday Night
N wind 10 to 15 km/h, with gusts as high as 25 km/h. A chance of showers. Waves 1 m or less.
Thursday
N wind around 15 km/h becoming S in the afternoon. Winds could gust as high as 25 km/h. Sunny. Waves 1 m or less.
Thursday Night
W wind around 10 km/h. Mostly clear. Waves 1 m or less.
Friday
W wind around 10 km/h becoming SSW in the afternoon. Mostly sunny. 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: 1:56 pm CDT Jul 14, 2025
Forecast Valid: 3pm CDT Jul 14, 2025-6pm CDT Jul 21, 2025
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