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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

    • Overnight

      Overnight:Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.

      Low: 54 °F

      Light Wind
      < 1ft

    • Saturday

      Saturday:Variable winds 5 kt or less. A slight chance of showers after 1pm. Waves 1 ft or less.

      High: 64 °F

      Light Wind
      < 1ft

    • Saturday Night

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

      Low: 56 °F

      Light Wind
      < 1ft

    • Sunday

      Sunday:ENE wind 5 to 10 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 ft or less.

      High: 64 °F

      ENE 10kt
      < 1ft

    • Sunday Night

      Sunday Night:ENE wind around 10 kt, with gusts as high as 20 kt. Showers likely after 1am. Waves around 1 ft.

      Low: 57 °F

      ENE 10kt
      1ft

    • Monday

      Monday:E wind 5 to 10 kt, with gusts as high as 15 kt. Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Waves around 1 ft.

      High: 67 °F

      E 10kt
      1ft

    • Monday Night

      Monday Night:Variable winds 5 kt or less. A slight chance of showers before 1am. Waves around 1 ft.

      Low: 58 °F

      Light Wind
      1ft

    • Tuesday

      Tuesday:SW wind 5 to 15 kt, with gusts as high as 20 kt. Partly sunny. Waves 1 ft or less.

      High: 71 °F

      SW 15kt
      < 1ft

    • Tuesday Night

      Tuesday Night:WNW wind 5 to 10 kt. Mostly cloudy. Waves 1 ft or less.

      Low: 58 °F

      WNW 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: 12:11 am CDT Aug 29, 2026
Forecast Valid: 12am CDT Aug 29, 2026-6pm CDT Sep 4, 2026

View Nearby Observations

Detailed Forecast

Overnight
Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.
Saturday
Variable winds 5 kt or less. A slight chance of showers after 1pm. Waves 1 ft or less.
Saturday Night
Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.
Sunday
ENE wind 5 to 10 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 ft or less.
Sunday Night
ENE wind around 10 kt, with gusts as high as 20 kt. Showers likely after 1am. Waves around 1 ft.
Monday
E wind 5 to 10 kt, with gusts as high as 15 kt. Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Waves around 1 ft.
Monday Night
Variable winds 5 kt or less. A slight chance of showers before 1am. Waves around 1 ft.
Tuesday
SW wind 5 to 15 kt, with gusts as high as 20 kt. Partly sunny. Waves 1 ft or less.
Tuesday Night
WNW wind 5 to 10 kt. Mostly cloudy. 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: 12:11 am CDT Aug 29, 2026
Forecast Valid: 12am CDT Aug 29, 2026-6pm CDT Sep 4, 2026
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