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Marquette, MI Local Forecast Office

21NM E Grand Portage MN

Marine Point Forecast

[NOTICE]
    • Thursday

      Thursday:Variable winds 5 kt or less. Widespread dense fog, mainly before 8am.  Waves 1 ft or less.

      High: 42 °F

      Light Wind
      < 1ft

    • Thursday Night

      Thursday Night:Variable winds 5 kt or less. A slight chance of showers after 3am.  Patchy fog.  Waves 1 ft or less.

      Low: 35 °F

      Light Wind
      < 1ft

    • Friday

      Friday:E wind 5 to 10 kt becoming NE in the afternoon. A chance of showers, with thunderstorms also possible after 4pm.  Patchy fog before 9am.  Waves 1 ft or less.

      High: 47 °F

      E 10kt
      < 1ft

    • Friday Night

      Friday Night:NW wind around 10 kt becoming SW in the evening. Winds could gust as high as 25 kt. Rain showers likely before 4am, then a slight chance of snow showers. Some thunder is also possible.   Waves 1 ft or less.

      Low: 28 °F

      NW 10kt
      < 1ft

    • Saturday

      Saturday:W wind 10 to 15 kt, with gusts as high as 25 kt. A slight chance of snow showers before 7am.   Waves 1 ft or less.

      High: 34 °F

      W 15kt
      < 1ft

    • Saturday Night

      Saturday Night:WNW wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. Waves 1 ft or less.

      Low: 23 °F

      WNW 15kt
      < 1ft

    • Sunday

      Sunday:NW wind around 10 kt, with gusts as high as 25 kt. Partly sunny. Waves 1 ft or less.

      High: 37 °F

      NW 10kt
      < 1ft

    • Sunday Night

      Sunday Night:WNW wind 5 to 10 kt becoming SW after midnight. Mostly clear. Waves 1 ft or less.

      Low: 28 °F

      WNW 10kt
      < 1ft

    • Monday

      Monday:S wind 5 to 10 kt. Mostly sunny. Waves 1 ft or less.

      High: 42 °F

      S 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: 3:12 am CDT Apr 16, 2026
Forecast Valid: 4am CDT Apr 16, 2026-6pm CDT Apr 22, 2026

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Detailed Forecast

Thursday
Variable winds 5 kt or less. Widespread dense fog, mainly before 8am. Waves 1 ft or less.
Thursday Night
Variable winds 5 kt or less. A slight chance of showers after 3am. Patchy fog. Waves 1 ft or less.
Friday
E wind 5 to 10 kt becoming NE in the afternoon. A chance of showers, with thunderstorms also possible after 4pm. Patchy fog before 9am. Waves 1 ft or less.
Friday Night
NW wind around 10 kt becoming SW in the evening. Winds could gust as high as 25 kt. Rain showers likely before 4am, then a slight chance of snow showers. Some thunder is also possible. Waves 1 ft or less.
Saturday
W wind 10 to 15 kt, with gusts as high as 25 kt. A slight chance of snow showers before 7am. Waves 1 ft or less.
Saturday Night
WNW wind 10 to 15 kt, with gusts as high as 25 kt. Mostly cloudy. Waves 1 ft or less.
Sunday
NW wind around 10 kt, with gusts as high as 25 kt. Partly sunny. Waves 1 ft or less.
Sunday Night
WNW wind 5 to 10 kt becoming SW after midnight. Mostly clear. Waves 1 ft or less.
Monday
S wind 5 to 10 kt. Mostly sunny. 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: 3:12 am CDT Apr 16, 2026
Forecast Valid: 4am CDT Apr 16, 2026-6pm CDT Apr 22, 2026
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