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Duluth, MN Local Forecast Office

10NM SW Grand Portage MN

Marine Point Forecast

[NOTICE]

    • This Afternoon

      This Afternoon:WSW wind 5 to 10 kt. Mostly sunny. Waves 1 ft or less.

      High: 37 °F

      WSW 10kt
      < 1ft

    • Tonight

      Tonight:Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.

      Low: 29 °F

      Light Wind
      < 1ft

    • Saturday

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

      High: 40 °F

      Light Wind
      < 1ft

    • Saturday Night

      Saturday Night:ENE wind 5 to 10 kt becoming ESE after midnight. Winds could gust as high as 20 kt. Rain. Waves 1 ft or less building to 3 ft.

      Low: 35 °F

      ESE 10kt
      Waves Building3ft

    • Sunday

      Sunday:ESE wind 5 to 10 kt becoming ENE in the afternoon. Winds could gust as high as 15 kt. Showers, with thunderstorms also possible after 4pm. Waves 2 to 3 ft.

      High: 45 °F

      ESE 10kt
      2-3ft

    • Sunday Night

      Sunday Night:NE wind 5 to 10 kt becoming W after midnight. Winds could gust as high as 15 kt. Showers likely and possibly a thunderstorm. Waves 1 to 2 ft.

      Low: 40 °F

      W 10kt
      1-2ft

    • Monday

      Monday:NW wind 5 to 10 kt becoming ENE in the afternoon. Mostly sunny. Waves 1 ft or less.

      High: 44 °F

      NW 10kt
      < 1ft

    • Monday Night

      Monday Night:ENE wind 5 to 15 kt, with gusts as high as 20 kt. A chance of rain. Waves 1 to 2 ft.

      Low: 35 °F

      ENE 15kt
      1-2ft

    • Tuesday

      Tuesday:ENE wind 10 to 15 kt, with gusts as high as 25 kt. A chance of rain. Waves around 3 ft.

      High: 39 °F

      ENE 15kt
      3ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 12:13 pm CDT Apr 10, 2026
Forecast Valid: 12pm CDT Apr 10, 2026-6pm CDT Apr 16, 2026

View Nearby Observations

Detailed Forecast

This Afternoon
WSW wind 5 to 10 kt. Mostly sunny. Waves 1 ft or less.
Tonight
Variable winds 5 kt or less. Partly cloudy. Waves 1 ft or less.
Saturday
Variable winds 5 kt or less. Sunny. Waves 1 ft or less.
Saturday Night
ENE wind 5 to 10 kt becoming ESE after midnight. Winds could gust as high as 20 kt. Rain. Waves 1 ft or less building to 3 ft.
Sunday
ESE wind 5 to 10 kt becoming ENE in the afternoon. Winds could gust as high as 15 kt. Showers, with thunderstorms also possible after 4pm. Waves 2 to 3 ft.
Sunday Night
NE wind 5 to 10 kt becoming W after midnight. Winds could gust as high as 15 kt. Showers likely and possibly a thunderstorm. Waves 1 to 2 ft.
Monday
NW wind 5 to 10 kt becoming ENE in the afternoon. Mostly sunny. Waves 1 ft or less.
Monday Night
ENE wind 5 to 15 kt, with gusts as high as 20 kt. A chance of rain. Waves 1 to 2 ft.
Tuesday
ENE wind 10 to 15 kt, with gusts as high as 25 kt. A chance of rain. Waves around 3 ft.

Note...Wave height forecasts are for ice free areas.


*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: 12:13 pm CDT Apr 10, 2026
Forecast Valid: 12pm CDT Apr 10, 2026-6pm CDT Apr 16, 2026
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