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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]
    • Today

      Today:S wind 5 to 10 kt. Sunny. Waves 1 ft or less.

      High: 42 °F

      S 10kt
      < 1ft

    • Tonight

      Tonight:Variable winds 5 kt or less. A chance of showers, mainly after 5am.   Waves 1 to 2 ft.

      Low: 34 °F

      Light Wind
      1-2ft

    • Tuesday

      Tuesday:E wind 5 to 15 kt becoming NNE in the afternoon. Showers, mainly before 5pm.   Waves 2 to 4 ft.

      High: 42 °F

      ESE 15kt
      2-4ft

    • Tuesday Night

      Tuesday Night:NNW wind around 10 kt, with gusts as high as 20 kt. A chance of showers, mainly before 7pm.   Waves 1 to 2 ft.

      Low: 37 °F

      NNW 10kt
      1-2ft

    • Wednesday

      Wednesday:NNW wind around 10 kt, with gusts as high as 20 kt. Partly sunny. Waves 1 ft or less.

      High: 50 °F

      NNW 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

      Low: 37 °F

      Light Wind
      < 1ft

    • Thursday

      Thursday:Variable winds less than 5 kt becoming SE 5 to 10 kt in the morning. Mostly sunny. Waves 1 ft or less.

      High: 50 °F

      ⇑SE 10kt
      < 1ft

    • Thursday Night

      Thursday Night:E wind around 10 kt becoming S after midnight. Winds could gust as high as 20 kt. A chance of showers.   Waves 1 to 3 ft.

      Low: 40 °F

      ESE 10kt
      1-3ft

    • Friday

      Friday:S wind 10 to 15 kt becoming SE in the afternoon. A chance of showers.   Waves around 3 ft.

      High: 55 °F

      S 15kt
      3ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 10:01 am CDT May 11, 2026
Forecast Valid: 11am CDT May 11, 2026-6pm CDT May 17, 2026

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Detailed Forecast

Today
S wind 5 to 10 kt. Sunny. Waves 1 ft or less.
Tonight
Variable winds 5 kt or less. A chance of showers, mainly after 5am. Waves 1 to 2 ft.
Tuesday
E wind 5 to 15 kt becoming NNE in the afternoon. Showers, mainly before 5pm. Waves 2 to 4 ft.
Tuesday Night
NNW wind around 10 kt, with gusts as high as 20 kt. A chance of showers, mainly before 7pm. Waves 1 to 2 ft.
Wednesday
NNW wind around 10 kt, with gusts as high as 20 kt. Partly sunny. Waves 1 ft or less.
Wednesday Night
Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.
Thursday
Variable winds less than 5 kt becoming SE 5 to 10 kt in the morning. Mostly sunny. Waves 1 ft or less.
Thursday Night
E wind around 10 kt becoming S after midnight. Winds could gust as high as 20 kt. A chance of showers. Waves 1 to 3 ft.
Friday
S wind 10 to 15 kt becoming SE in the afternoon. A chance of showers. Waves around 3 ft.

*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: 10:01 am CDT May 11, 2026
Forecast Valid: 11am CDT May 11, 2026-6pm CDT May 17, 2026
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