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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]
    • Saturday

      Saturday:Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

      High: 46 °F

      Light Wind
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. A slight chance of rain after 4am.   Waves 1 ft or less.

      Low: 38 °F

      Light Wind
      < 1ft

    • Sunday

      Sunday:ENE wind 5 to 10 kt. A slight chance of rain before 1pm.   Waves 1 ft or less.

      High: 45 °F

      ENE 10kt
      < 1ft

    • Sunday Night

      Sunday Night:NE wind around 10 kt, with gusts as high as 15 kt. Mostly cloudy. Waves 1 ft or less.

      Low: 38 °F

      NE 10kt
      < 1ft

    • Monday

      Monday:ENE wind 10 to 15 kt, with gusts as high as 25 kt. Rain likely, mainly after 1pm.   Waves 1 ft building to 4 ft.

      High: 46 °F

      ENE 15kt
      Waves Building4ft

    • Monday Night

      Monday Night:ENE wind 10 to 15 kt becoming N after midnight. Winds could gust as high as 25 kt. Rain.   Waves 5 to 6 ft.

      Low: 41 °F

      ENE 15kt
      5-6ft

    • Tuesday

      Tuesday:WNW wind 15 to 20 kt, with gusts as high as 35 kt. A chance of rain, mainly before 1pm.   Waves 5 ft subsiding to 2 ft.

      High: 47 °F

      WNW 20kt
      5ftWaves Subsiding

    • Tuesday Night

      Tuesday Night:WNW wind 5 to 10 kt, with gusts as high as 25 kt. Partly cloudy. Waves 1 to 2 ft.

      Low: 35 °F

      WNW 10kt
      1-2ft

    • Wednesday

      Wednesday:NW wind 5 to 10 kt becoming W in the afternoon. Winds could gust as high as 15 kt. Mostly sunny. Waves 1 ft or less.

      High: 43 °F

      W 10kt
      < 1ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:21 am CDT Apr 25, 2026
Forecast Valid: 4am CDT Apr 25, 2026-6pm CDT May 1, 2026

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Detailed Forecast

Saturday
Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.
Saturday Night
Variable winds 5 kt or less. A slight chance of rain after 4am. Waves 1 ft or less.
Sunday
ENE wind 5 to 10 kt. A slight chance of rain before 1pm. Waves 1 ft or less.
Sunday Night
NE wind around 10 kt, with gusts as high as 15 kt. Mostly cloudy. Waves 1 ft or less.
Monday
ENE wind 10 to 15 kt, with gusts as high as 25 kt. Rain likely, mainly after 1pm. Waves 1 ft building to 4 ft.
Monday Night
ENE wind 10 to 15 kt becoming N after midnight. Winds could gust as high as 25 kt. Rain. Waves 5 to 6 ft.
Tuesday
WNW wind 15 to 20 kt, with gusts as high as 35 kt. A chance of rain, mainly before 1pm. Waves 5 ft subsiding to 2 ft.
Tuesday Night
WNW wind 5 to 10 kt, with gusts as high as 25 kt. Partly cloudy. Waves 1 to 2 ft.
Wednesday
NW wind 5 to 10 kt becoming W in the afternoon. 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: 2:21 am CDT Apr 25, 2026
Forecast Valid: 4am CDT Apr 25, 2026-6pm CDT May 1, 2026
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