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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]
    • Saturday

      Saturday:NNW wind 5 to 10 kt becoming SW in the afternoon. Winds could gust as high as 15 kt. A chance of flurries between noon and 2pm.   Waves 1 ft or less.

      High: 21 °F

      SW 10kt
      < 1ft

    • Saturday Night

      Saturday Night:SSW wind around 10 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 to 3 ft.

      Low: 17 °F

      SSW 10kt
      1-3ft

      Small Craft Advisory
      Small Craft Advisory

    • Sunday

      Sunday:SSW wind 10 to 15 kt becoming WSW in the afternoon. Winds could gust as high as 25 kt. Snow likely, mainly after 10am.   Waves 2 to 4 ft.

      High: 23 °F

      SSW 15kt
      2-4ft

      Small Craft Advisory
      Small Craft Advisory

    • Sunday Night

      Sunday Night:WSW wind 5 to 10 kt becoming NNW after midnight. Winds could gust as high as 20 kt. A slight chance of snow before midnight.   Waves 1 to 2 ft.

      Low: 11 °F

      NNW 10kt
      1-2ft

    • Monday

      Monday:NNW wind 5 to 10 kt, with gusts as high as 20 kt. Sunny. Waves 1 ft or less.

      High: 17 °F

      NNW 10kt
      < 1ft

    • Monday Night

      Monday Night:Variable winds 5 kt or less. Winds could gust as high as 15 kt. Mostly clear. Waves 1 ft or less.

      Low: 1 °F

      Light Wind
      < 1ft

    • Tuesday

      Tuesday:Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

      High: 16 °F

      Light Wind
      < 1ft

    • Tuesday Night

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

      Low: 6 °F

      Light Wind
      < 1ft

    • Wednesday

      Wednesday:Variable winds 5 kt or less. Winds could gust as high as 15 kt. Mostly sunny. Waves 1 ft or less.

      High: 24 °F

      Light Wind
      < 1ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 1:41 am CST Jan 31, 2026
Forecast Valid: 4am CST Jan 31, 2026-6pm CST Feb 6, 2026

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Detailed Forecast

Saturday
NNW wind 5 to 10 kt becoming SW in the afternoon. Winds could gust as high as 15 kt. A chance of flurries between noon and 2pm. Waves 1 ft or less.
Saturday Night
SSW wind around 10 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 to 3 ft.
Sunday
SSW wind 10 to 15 kt becoming WSW in the afternoon. Winds could gust as high as 25 kt. Snow likely, mainly after 10am. Waves 2 to 4 ft.
Sunday Night
WSW wind 5 to 10 kt becoming NNW after midnight. Winds could gust as high as 20 kt. A slight chance of snow before midnight. Waves 1 to 2 ft.
Monday
NNW wind 5 to 10 kt, with gusts as high as 20 kt. Sunny. Waves 1 ft or less.
Monday Night
Variable winds 5 kt or less. Winds could gust as high as 15 kt. Mostly clear. Waves 1 ft or less.
Tuesday
Variable winds 5 kt or less. Sunny. Waves 1 ft or less.
Tuesday Night
Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.
Wednesday
Variable winds 5 kt or less. Winds could gust as high as 15 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: 1:41 am CST Jan 31, 2026
Forecast Valid: 4am CST Jan 31, 2026-6pm CST Feb 6, 2026
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