Hazardous Weather Conditions

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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]
    • This Afternoon

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

      High: 61 °F

      Light Wind
      < 1ft

    • Tonight

      Tonight:ENE wind 5 to 10 kt. A slight chance of showers after 1am.   Waves around 1 ft.

      Low: 46 °F

      ENE 10kt
      1ft

    • Sunday

      Sunday:ENE wind 5 to 15 kt, with gusts as high as 20 kt. Partly sunny. Waves around 1 ft.

      High: 60 °F

      ENE 15kt
      1ft

    • Sunday Night

      Sunday Night:ENE wind 5 to 15 kt, with gusts as high as 20 kt. Showers and thunderstorms before 3am, then showers and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am.   Waves 2 to 3 ft.

      Low: 46 °F

      ENE 15kt
      2-3ft

    • Monday

      Monday:ENE wind 5 to 15 kt. A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm, then a chance of showers and thunderstorms after 1pm.   Waves 1 to 2 ft.

      High: 62 °F

      ENE 15kt
      1-2ft

    • Monday Night

      Monday Night:ENE wind 5 to 15 kt becoming W after midnight. Winds could gust as high as 20 kt. Showers and possibly a thunderstorm.   Waves 1 to 2 ft.

      Low: 49 °F

      ENE 15kt
      1-2ft

    • Tuesday

      Tuesday:SW wind 5 to 10 kt, with gusts as high as 15 kt. A slight chance of thunderstorms before 7am, then a slight chance of showers and thunderstorms after 1pm.   Waves 1 to 2 ft.

      High: 69 °F

      SW 10kt
      1-2ft

    • Tuesday Night

      Tuesday Night:WSW wind 5 to 10 kt. A chance of showers, mainly before 1am.   Waves around 1 ft.

      Low: 50 °F

      WSW 10kt
      1ft

    • Wednesday

      Wednesday:SW wind 5 to 10 kt, with gusts as high as 15 kt. A slight chance of showers.   Waves 1 ft or less.

      High: 70 °F

      SW 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: 1:56 pm CDT Jun 27, 2026
Forecast Valid: 2pm CDT Jun 27, 2026-6pm CDT Jul 3, 2026

View Nearby Observations

Detailed Forecast

This Afternoon
Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.
Tonight
ENE wind 5 to 10 kt. A slight chance of showers after 1am. Waves around 1 ft.
Sunday
ENE wind 5 to 15 kt, with gusts as high as 20 kt. Partly sunny. Waves around 1 ft.
Sunday Night
ENE wind 5 to 15 kt, with gusts as high as 20 kt. Showers and thunderstorms before 3am, then showers and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Waves 2 to 3 ft.
Monday
ENE wind 5 to 15 kt. A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Waves 1 to 2 ft.
Monday Night
ENE wind 5 to 15 kt becoming W after midnight. Winds could gust as high as 20 kt. Showers and possibly a thunderstorm. Waves 1 to 2 ft.
Tuesday
SW wind 5 to 10 kt, with gusts as high as 15 kt. A slight chance of thunderstorms before 7am, then a slight chance of showers and thunderstorms after 1pm. Waves 1 to 2 ft.
Tuesday Night
WSW wind 5 to 10 kt. A chance of showers, mainly before 1am. Waves around 1 ft.
Wednesday
SW wind 5 to 10 kt, with gusts as high as 15 kt. A slight chance of showers. 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: 1:56 pm CDT Jun 27, 2026
Forecast Valid: 2pm CDT Jun 27, 2026-6pm CDT Jul 3, 2026
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