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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:ENE wind around 10 kt, with gusts as high as 15 kt. A chance of showers and thunderstorms. Some of the storms could be severe.   Waves around 1 ft.

      High: 61 °F

      ENE 10kt
      1ft

      Small Craft Advisory
      Small Craft Advisory

    • Tonight

      Tonight:ENE wind 5 to 15 kt becoming SE after midnight. Winds could gust as high as 20 kt. Showers and thunderstorms likely before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could be severe.   Waves 1 to 2 ft.

      Low: 53 °F

      ENE 15kt
      1-2ft

      Small Craft Advisory
      Small Craft Advisory

    • Tuesday

      Tuesday:WSW wind 5 to 10 kt becoming SSW in the morning. Winds could gust as high as 15 kt. A slight chance of showers and thunderstorms before 7am. Some of the storms could be severe.   Waves 1 to 2 ft.

      High: 71 °F

      SSW 10kt
      1-2ft

    • Tuesday Night

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

      Low: 50 °F

      WSW 10kt
      < 1ft

    • Wednesday

      Wednesday:SW wind 5 to 10 kt, with gusts as high as 20 kt. A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm.   Waves 1 ft or less.

      High: 70 °F

      SW 10kt
      < 1ft

    • Wednesday Night

      Wednesday Night:WSW wind 5 to 10 kt. A chance of showers and thunderstorms before 1am.   Waves 1 ft or less.

      Low: 50 °F

      WSW 10kt
      < 1ft

    • Thursday

      Thursday:SW wind 5 to 10 kt, with gusts as high as 15 kt. Mostly sunny. Waves 1 ft or less.

      High: 71 °F

      SW 10kt
      < 1ft

    • Thursday Night

      Thursday Night:Variable winds 5 kt or less. A slight chance of showers.   Waves 1 ft or less.

      Low: 50 °F

      Light Wind
      < 1ft

    • Friday

      Friday:Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 1pm.   Waves 1 ft or less.

      High: 67 °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: 2:42 pm CDT Jun 29, 2026
Forecast Valid: 2pm CDT Jun 29, 2026-6pm CDT Jul 5, 2026

View Nearby Observations

Detailed Forecast

This Afternoon
ENE wind around 10 kt, with gusts as high as 15 kt. A chance of showers and thunderstorms. Some of the storms could be severe. Waves around 1 ft.
Tonight
ENE wind 5 to 15 kt becoming SE after midnight. Winds could gust as high as 20 kt. Showers and thunderstorms likely before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could be severe. Waves 1 to 2 ft.
Tuesday
WSW wind 5 to 10 kt becoming SSW in the morning. Winds could gust as high as 15 kt. A slight chance of showers and thunderstorms before 7am. Some of the storms could be severe. Waves 1 to 2 ft.
Tuesday Night
WSW wind 5 to 10 kt, with gusts as high as 20 kt. Mostly cloudy. Waves 1 ft or less.
Wednesday
SW wind 5 to 10 kt, with gusts as high as 20 kt. A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Waves 1 ft or less.
Wednesday Night
WSW wind 5 to 10 kt. A chance of showers and thunderstorms before 1am. Waves 1 ft or less.
Thursday
SW wind 5 to 10 kt, with gusts as high as 15 kt. Mostly sunny. Waves 1 ft or less.
Thursday Night
Variable winds 5 kt or less. A slight chance of showers. Waves 1 ft or less.
Friday
Variable winds 5 kt or less. A chance of showers and thunderstorms, mainly after 1pm. 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: 2:42 pm CDT Jun 29, 2026
Forecast Valid: 2pm CDT Jun 29, 2026-6pm CDT Jul 5, 2026
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