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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:WSW wind 10 to 15 kt. Mostly sunny. Waves around 2 ft.

      High: 65 °F

      WSW 15kt
      2ft

    • Tonight

      Tonight:WSW wind 5 to 10 kt becoming WNW after midnight. Mostly clear. Waves 1 ft or less.

      Low: 49 °F

      WSW 10kt
      < 1ft

    • Wednesday

      Wednesday:W wind 5 to 10 kt becoming SSW in the afternoon. Sunny. Waves 1 ft or less.

      High: 64 °F

      SSW 10kt
      < 1ft

    • Wednesday Night

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

      Low: 49 °F

      Light Wind
      < 1ft

    • Thursday

      Thursday:SW wind 10 to 15 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 to 2 ft.

      High: 69 °F

      SW 15kt
      1-2ft

    • Thursday Night

      Thursday Night:SW wind around 10 kt, with gusts as high as 20 kt. Partly cloudy. Waves around 1 ft.

      Low: 53 °F

      SW 10kt
      1ft

    • Friday

      Friday:SW wind around 10 kt, with gusts as high as 20 kt. A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Waves around 1 ft.

      High: 68 °F

      SW 10kt
      1ft

    • Friday Night

      Friday Night:WNW wind 5 to 10 kt. Partly cloudy. Waves 1 ft or less.

      Low: 51 °F

      WNW 10kt
      < 1ft

    • Saturday

      Saturday:WSW wind 5 to 15 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 ft or less.

      High: 66 °F

      WSW 15kt
      < 1ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 1:21 pm CDT Aug 4, 2026
Forecast Valid: 3pm CDT Aug 4, 2026-6pm CDT Aug 11, 2026

View Nearby Observations

Detailed Forecast

This Afternoon
WSW wind 10 to 15 kt. Mostly sunny. Waves around 2 ft.
Tonight
WSW wind 5 to 10 kt becoming WNW after midnight. Mostly clear. Waves 1 ft or less.
Wednesday
W wind 5 to 10 kt becoming SSW in the afternoon. Sunny. Waves 1 ft or less.
Wednesday Night
Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.
Thursday
SW wind 10 to 15 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 to 2 ft.
Thursday Night
SW wind around 10 kt, with gusts as high as 20 kt. Partly cloudy. Waves around 1 ft.
Friday
SW wind around 10 kt, with gusts as high as 20 kt. A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Waves around 1 ft.
Friday Night
WNW wind 5 to 10 kt. Partly cloudy. Waves 1 ft or less.
Saturday
WSW wind 5 to 15 kt, with gusts as high as 20 kt. Mostly sunny. Waves 1 ft 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: 1:21 pm CDT Aug 4, 2026
Forecast Valid: 3pm CDT Aug 4, 2026-6pm CDT Aug 11, 2026
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