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Marquette, MI Local Forecast Office

21NM E Grand Portage MN

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:W wind 5 to 10 kt. A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am.  Widespread smoke, mainly between 10pm and 11pm.  Waves 1 ft or less.

      Low: 57 °F

      W 10kt
      < 1ft

    • Saturday

      Saturday:NNW wind 5 to 10 kt becoming WSW in the afternoon. Widespread smoke, mainly after 8am.  Waves 1 ft or less.

      High: 68 °F

      NNW 10kt
      < 1ft

    • Saturday Night

      Saturday Night:Variable winds 5 kt or less. Widespread smoke, mainly after 5am.  Waves 1 ft or less.

      Low: 58 °F

      Light Wind
      < 1ft

    • Sunday

      Sunday:SSW wind 5 to 10 kt. Widespread smoke before 8am.  Waves 1 ft or less.

      High: 76 °F

      SSW 10kt
      < 1ft

    • Sunday Night

      Sunday Night:Variable winds 5 kt or less. A slight chance of showers, then showers likely and possibly a thunderstorm after 1am.   Waves 1 ft or less.

      Low: 64 °F

      Light Wind
      < 1ft

    • Monday

      Monday:SW wind around 10 kt, with gusts as high as 25 kt. Showers likely, mainly after 1pm.   Waves 1 ft or less.

      High: 86 °F

      SW 10kt
      < 1ft

    • Monday Night

      Monday Night:WNW wind around 10 kt, with gusts as high as 20 kt. A chance of showers before 1am.   Waves 1 ft or less.

      Low: 61 °F

      WNW 10kt
      < 1ft

    • Tuesday

      Tuesday:WNW wind around 10 kt, with gusts as high as 25 kt. Mostly sunny. Waves 1 ft or less.

      High: 82 °F

      WNW 10kt
      < 1ft

    • Tuesday Night

      Tuesday Night:NNW wind around 10 kt, with gusts as high as 20 kt. Partly cloudy. Waves 1 ft or less.

      Low: 60 °F

      NNW 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: 8:37 pm CDT Jul 17, 2026
Forecast Valid: 9pm CDT Jul 17, 2026-6pm CDT Jul 24, 2026

View Nearby Observations

Detailed Forecast

Tonight
W wind 5 to 10 kt. A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Widespread smoke, mainly between 10pm and 11pm. Waves 1 ft or less.
Saturday
NNW wind 5 to 10 kt becoming WSW in the afternoon. Widespread smoke, mainly after 8am. Waves 1 ft or less.
Saturday Night
Variable winds 5 kt or less. Widespread smoke, mainly after 5am. Waves 1 ft or less.
Sunday
SSW wind 5 to 10 kt. Widespread smoke before 8am. Waves 1 ft or less.
Sunday Night
Variable winds 5 kt or less. A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Waves 1 ft or less.
Monday
SW wind around 10 kt, with gusts as high as 25 kt. Showers likely, mainly after 1pm. Waves 1 ft or less.
Monday Night
WNW wind around 10 kt, with gusts as high as 20 kt. A chance of showers before 1am. Waves 1 ft or less.
Tuesday
WNW wind around 10 kt, with gusts as high as 25 kt. Mostly sunny. Waves 1 ft or less.
Tuesday Night
NNW wind around 10 kt, with gusts as high as 20 kt. Partly 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: 47.92°N 89.17°W
Last Update: 8:37 pm CDT Jul 17, 2026
Forecast Valid: 9pm CDT Jul 17, 2026-6pm CDT Jul 24, 2026
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