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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

    • Tonight

      Tonight:SSW wind around 16 kt. Partly cloudy. Waves 2 to 3 ft.

      Low: 40 °F

      SSW 16kt
      2-3ft

    • Monday

      Monday:SSW wind 7 to 14 kt. Partly sunny. Waves 1 to 2 ft.

      High: 45 °F

      SSW 14kt
      1-2ft

    • Monday Night

      Monday Night:ENE wind 9 to 13 kt becoming S after midnight. Rain likely and possibly a thunderstorm, mainly after 5am. Waves 1 ft or less.

      Low: 41 °FRising Temperatures

      S 13kt
      < 1ft

    • Tuesday

      Tuesday:S wind 16 to 19 kt. Rain likely and possibly a thunderstorm before 2pm, then rain between 2pm and 5pm, then rain and possibly a thunderstorm after 5pm. Waves 3 to 4 ft.

      High: 49 °F

      S 19kt
      3-4ft

    • Tuesday Night

      Tuesday Night:SW wind around 20 kt becoming NNW after midnight. Rain and possibly a thunderstorm. Waves around 4 ft.

      Low: 32 °FRising Temperatures

      NNW 20kt
      4ft

    • Wednesday

      Wednesday:N wind around 21 kt. A chance of rain before 8am. Waves around 6 ft.

      High: 36 °F

      N 21kt
      6ft

    • Wednesday Night

      Wednesday Night:NE wind 17 to 20 kt. A chance of rain and snow after 2am. Waves 4 to 5 ft.

      Low: 33 °FRising Temperatures

      NE 20kt
      4-5ft

    • Thursday

      Thursday:ENE wind around 20 kt. A chance of rain and snow before 8am, then rain likely. Waves around 4 ft.

      High: 40 °F

      ENE 20kt
      4ft

    • Thursday Night

      Thursday Night:E wind around 21 kt. Rain likely. Waves around 4 ft.

      Low: 35 °FRising Temperatures

      E 21kt
      4ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 5:35 pm EDT Mar 29, 2026
Forecast Valid: 8pm EDT Mar 29, 2026-6pm EDT Apr 5, 2026

View Nearby Observations

Detailed Forecast

Tonight
SSW wind around 16 kt. Partly cloudy. Waves 2 to 3 ft.
Monday
SSW wind 7 to 14 kt. Partly sunny. Waves 1 to 2 ft.
Monday Night
ENE wind 9 to 13 kt becoming S after midnight. Rain likely and possibly a thunderstorm, mainly after 5am. Waves 1 ft or less.
Tuesday
S wind 16 to 19 kt. Rain likely and possibly a thunderstorm before 2pm, then rain between 2pm and 5pm, then rain and possibly a thunderstorm after 5pm. Waves 3 to 4 ft.
Tuesday Night
SW wind around 20 kt becoming NNW after midnight. Rain and possibly a thunderstorm. Waves around 4 ft.
Wednesday
N wind around 21 kt. A chance of rain before 8am. Waves around 6 ft.
Wednesday Night
NE wind 17 to 20 kt. A chance of rain and snow after 2am. Waves 4 to 5 ft.
Thursday
ENE wind around 20 kt. A chance of rain and snow before 8am, then rain likely. Waves around 4 ft.
Thursday Night
E wind around 21 kt. Rain likely. Waves around 4 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: 5:35 pm EDT Mar 29, 2026
Forecast Valid: 8pm EDT Mar 29, 2026-6pm EDT Apr 5, 2026
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