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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:E wind around 10 kt, with gusts as high as 20 kt. Partly sunny. Waves around 1 ft.

      High: 25 °F

      E 10kt
      1ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:ENE wind 10 to 15 kt, with gusts as high as 20 kt. A slight chance of snow showers, mainly between 4am and 5am.   Waves 1 to 2 ft.

      Low: 27 °F

      ENE 15kt
      1-2ft

      Small Craft Advisory
      Small Craft Advisory

    • Thursday

      Thursday:ENE wind 15 to 20 kt increasing to 20 to 25 kt in the afternoon. Winds could gust as high as 35 kt. Snow showers, mainly after noon. The snow could be heavy at times.  Widespread freezing spray after 1pm.  Waves 3 ft building to 6 ft.

      High: 30 °F

      ⇑ENE 25kt
      Waves Building6ft

      Gale Warning
      Gale Warning

    • Thursday Night

      Thursday Night:ENE wind 20 to 25 kt becoming N 15 to 20 kt after midnight. Winds could gust as high as 45 kt. Snow showers before 10pm, then snow showers, possibly mixed with sleet between 10pm and 11pm, then snow showers after 11pm.   Waves 6 ft subsiding to 3 ft.

      Low: 28 °F

      ENE 25kt⇓
      6ftWaves Subsiding

      Gale Warning
      Gale Warning

    • Friday

      Friday:N wind 10 to 15 kt becoming ENE in the afternoon. Winds could gust as high as 25 kt. A slight chance of snow showers before 1pm.   Waves 1 to 2 ft.

      High: 34 °F

      ENE 15kt
      1-2ft

    • Friday Night

      Friday Night:ENE wind 15 to 20 kt, with gusts as high as 35 kt. Snow showers, possibly mixed with sleet, becoming all snow after 4am.   Waves 1 to 3 ft.

      Low: 29 °F

      ENE 20kt
      1-3ft

    • Saturday

      Saturday:NE wind 15 to 20 kt, with gusts as high as 35 kt. Snow.   Waves 3 to 4 ft.

      High: 32 °F

      NE 20kt
      3-4ft

    • Saturday Night

      Saturday Night:N wind 15 to 20 kt, with gusts as high as 30 kt. A chance of snow.   Waves 1 to 2 ft.

      Low: 26 °F

      N 20kt
      1-2ft

    • Sunday

      Sunday:NNW wind 10 to 15 kt becoming W in the afternoon. Winds could gust as high as 30 kt. Mostly sunny. Waves 1 ft or less.

      High: 38 °F

      NNW 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: 2:01 pm CDT Apr 1, 2026
Forecast Valid: 3pm CDT Apr 1, 2026-6pm CDT Apr 8, 2026

View Nearby Observations

Detailed Forecast

This Afternoon
E wind around 10 kt, with gusts as high as 20 kt. Partly sunny. Waves around 1 ft.
Tonight
ENE wind 10 to 15 kt, with gusts as high as 20 kt. A slight chance of snow showers, mainly between 4am and 5am. Waves 1 to 2 ft.
Thursday
ENE wind 15 to 20 kt increasing to 20 to 25 kt in the afternoon. Winds could gust as high as 35 kt. Snow showers, mainly after noon. The snow could be heavy at times. Widespread freezing spray after 1pm. Waves 3 ft building to 6 ft.
Thursday Night
ENE wind 20 to 25 kt becoming N 15 to 20 kt after midnight. Winds could gust as high as 45 kt. Snow showers before 10pm, then snow showers, possibly mixed with sleet between 10pm and 11pm, then snow showers after 11pm. Waves 6 ft subsiding to 3 ft.
Friday
N wind 10 to 15 kt becoming ENE in the afternoon. Winds could gust as high as 25 kt. A slight chance of snow showers before 1pm. Waves 1 to 2 ft.
Friday Night
ENE wind 15 to 20 kt, with gusts as high as 35 kt. Snow showers, possibly mixed with sleet, becoming all snow after 4am. Waves 1 to 3 ft.
Saturday
NE wind 15 to 20 kt, with gusts as high as 35 kt. Snow. Waves 3 to 4 ft.
Saturday Night
N wind 15 to 20 kt, with gusts as high as 30 kt. A chance of snow. Waves 1 to 2 ft.
Sunday
NNW wind 10 to 15 kt becoming W in the afternoon. Winds could gust as high as 30 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: 2:01 pm CDT Apr 1, 2026
Forecast Valid: 3pm CDT Apr 1, 2026-6pm CDT Apr 8, 2026
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