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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]
    • Wednesday

      Wednesday:W wind 18 to 25 kt becoming NNW in the afternoon. A chance of rain and snow before 8am, then snow.   Waves 3 ft building to 8 ft.

      High: 36 °FFalling Temperatures

      NNW 25kt
      Waves Building8ft

    • Wednesday Night

      Wednesday Night:N wind around 28 kt. Snow.   Waves 9 to 11 ft. occasionally to 14ft.

      Low: 18 °F

      N 28kt
      9-11ft

    • Thursday

      Thursday:NNW wind 20 to 27 kt. A chance of snow before 1pm.   Waves 10 ft subsiding to 6 ft.

      High: 21 °F

      NNW 27kt
      10ftWaves Subsiding

    • Thursday Night

      Thursday Night:NW wind 17 to 21 kt becoming SSW after midnight. Mostly cloudy. Waves 4 to 5 ft.

      Low: 19 °F

      SSW 21kt
      4-5ft

    • Friday

      Friday:S wind 22 to 25 kt. Snow.   Waves 6 to 7 ft. occasionally to 9ft.

      High: 33 °F

      S 25kt
      6-7ft

    • Friday Night

      Friday Night:SW wind 19 to 22 kt. A chance of snow before 1am.   Waves 4 to 5 ft.

      Low: 27 °F

      SW 22kt
      4-5ft

    • Saturday

      Saturday:SW wind around 17 kt. A chance of snow.   Waves around 3 ft.

      High: 31 °F

      SW 17kt
      3ft

    • Saturday Night

      Saturday Night:WSW wind 19 to 21 kt. A chance of snow.   Waves 4 to 5 ft.

      Low: 20 °F

      WSW 21kt
      4-5ft

    • Sunday

      Sunday:W wind 19 to 21 kt. A chance of snow.   Waves around 5 ft.

      High: 24 °F

      W 21kt
      5ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:13 am EST Jan 14, 2026
Forecast Valid: 4am EST Jan 14, 2026-6pm EST Jan 20, 2026

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Detailed Forecast

Wednesday
W wind 18 to 25 kt becoming NNW in the afternoon. A chance of rain and snow before 8am, then snow. Waves 3 ft building to 8 ft.
Wednesday Night
N wind around 28 kt. Snow. Waves 9 to 11 ft. occasionally to 14ft.
Thursday
NNW wind 20 to 27 kt. A chance of snow before 1pm. Waves 10 ft subsiding to 6 ft.
Thursday Night
NW wind 17 to 21 kt becoming SSW after midnight. Mostly cloudy. Waves 4 to 5 ft.
Friday
S wind 22 to 25 kt. Snow. Waves 6 to 7 ft. occasionally to 9ft.
Friday Night
SW wind 19 to 22 kt. A chance of snow before 1am. Waves 4 to 5 ft.
Saturday
SW wind around 17 kt. A chance of snow. Waves around 3 ft.
Saturday Night
WSW wind 19 to 21 kt. A chance of snow. Waves 4 to 5 ft.
Sunday
W wind 19 to 21 kt. A chance of snow. Waves around 5 ft.

*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: 43.53°N 82.15°W
Last Update: 4:13 am EST Jan 14, 2026
Forecast Valid: 4am EST Jan 14, 2026-6pm EST Jan 20, 2026
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