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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]
    • Today

      Today:SE wind 25 to 29 kt, with gusts as high as 40 kt. Snow likely before 10am, then a slight chance of rain between 10am and 11am. The snow could be heavy at times.   Waves 5 ft building to 8 ft.

      High: 50 °F

      SE 29kt
      Waves Building8ft

    • Tonight

      Tonight:SSE wind 28 to 31 kt, with gusts as high as 41 kt. A slight chance of rain before 11pm, then a chance of rain after 2am.   Waves 7 to 9 ft. occasionally to 12ft.

      Low: 34 °F

      SSE 31kt
      7-9ft

    • Monday

      Monday:SW wind 25 to 29 kt, with gusts as high as 39 kt. A chance of rain before 8am.   Waves 7 to 8 ft. occasionally to 10ft.

      High: 44 °FFalling Temperatures

      SW 29kt
      7-8ft

    • Monday Night

      Monday Night:WNW wind around 33 kt, with gusts as high as 39 kt. A chance of snow after 8pm.  Widespread freezing spray.  Waves 9 to 10 ft. occasionally to 13ft.

      Low: 17 °F

      WNW 33kt
      9-10ft

    • Tuesday

      Tuesday:WNW wind 20 to 29 kt. Widespread freezing spray. Mostly cloudy. Waves 10 ft subsiding to 7 ft.

      High: 25 °FFalling Temperatures

      WNW 29kt
      10ftWaves Subsiding

    • Tuesday Night

      Tuesday Night:WNW wind 14 to 16 kt. Widespread freezing spray before 9pm. Mostly cloudy. Waves 3 to 5 ft.

      Low: 22 °F

      WNW 16kt
      3-5ft

    • Wednesday

      Wednesday:S wind 19 to 24 kt. Mostly cloudy. Waves 3 ft building to 6 ft.

      High: 35 °FFalling Temperatures

      S 24kt
      Waves Building6ft

    • Wednesday Night

      Wednesday Night:SSW wind 17 to 20 kt. Mostly cloudy. Waves 3 to 5 ft.

      Low: 33 °F

      SSW 20kt
      3-5ft

    • Thursday

      Thursday:SSW wind 10 to 15 kt. Mostly cloudy. Waves 1 to 3 ft.

      High: 39 °FFalling Temperatures

      SSW 15kt
      1-3ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:25 am EDT Mar 15, 2026
Forecast Valid: 7am EDT Mar 15, 2026-6pm EDT Mar 21, 2026

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Detailed Forecast

Today
SE wind 25 to 29 kt, with gusts as high as 40 kt. Snow likely before 10am, then a slight chance of rain between 10am and 11am. The snow could be heavy at times. Waves 5 ft building to 8 ft.
Tonight
SSE wind 28 to 31 kt, with gusts as high as 41 kt. A slight chance of rain before 11pm, then a chance of rain after 2am. Waves 7 to 9 ft. occasionally to 12ft.
Monday
SW wind 25 to 29 kt, with gusts as high as 39 kt. A chance of rain before 8am. Waves 7 to 8 ft. occasionally to 10ft.
Monday Night
WNW wind around 33 kt, with gusts as high as 39 kt. A chance of snow after 8pm. Widespread freezing spray. Waves 9 to 10 ft. occasionally to 13ft.
Tuesday
WNW wind 20 to 29 kt. Widespread freezing spray. Mostly cloudy. Waves 10 ft subsiding to 7 ft.
Tuesday Night
WNW wind 14 to 16 kt. Widespread freezing spray before 9pm. Mostly cloudy. Waves 3 to 5 ft.
Wednesday
S wind 19 to 24 kt. Mostly cloudy. Waves 3 ft building to 6 ft.
Wednesday Night
SSW wind 17 to 20 kt. Mostly cloudy. Waves 3 to 5 ft.
Thursday
SSW wind 10 to 15 kt. Mostly cloudy. Waves 1 to 3 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: 4:25 am EDT Mar 15, 2026
Forecast Valid: 7am EDT Mar 15, 2026-6pm EDT Mar 21, 2026
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