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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]
    • This Afternoon

      This Afternoon:SSE wind around 7 kt. Mostly cloudy. Waves 1 ft or less.

      High: 41 °F

      SSE 7kt
      < 1ft

    • Tonight

      Tonight:SE wind 13 to 15 kt becoming S after midnight. Mostly cloudy. Waves 1 to 2 ft.

      Low: 39 °F

      SSE 15kt
      1-2ft

    • Sunday

      Sunday:WNW wind 10 to 18 kt becoming N in the afternoon. Showers likely, mainly before 2pm.   Waves 1 to 3 ft.

      High: 39 °FFalling Temperatures

      N 18kt
      1-3ft

    • Sunday Night

      Sunday Night:N wind around 20 kt. A chance of showers before 8pm.   Waves 4 to 5 ft.

      Low: 29 °F

      N 20kt
      4-5ft

    • Monday

      Monday:NNW wind 16 to 18 kt. Partly sunny. Waves 3 to 4 ft.

      High: 31 °FFalling Temperatures

      NNW 18kt
      3-4ft

    • Monday Night

      Monday Night:N wind 7 to 11 kt becoming E after midnight. Mostly clear. Waves 1 to 2 ft.

      Low: 28 °F

      N 11kt
      1-2ft

    • Tuesday

      Tuesday:SSW wind 14 to 17 kt. Partly sunny. Waves 1 to 3 ft.

      High: 38 °FFalling Temperatures

      SSW 17kt
      1-3ft

    • Tuesday Night

      Tuesday Night:SW wind 14 to 19 kt becoming NNW after midnight. Mostly cloudy. Waves 2 to 3 ft.

      Low: 31 °F

      NNW 19kt
      2-3ft

    • Wednesday

      Wednesday:N wind 18 to 23 kt becoming ENE in the afternoon. Mostly cloudy. Waves 5 to 7 ft. occasionally to 9ft.

      High: 37 °FFalling Temperatures

      N 23kt
      5-7ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:50 am EDT Mar 21, 2026
Forecast Valid: 1pm EDT Mar 21, 2026-6pm EDT Mar 27, 2026

View Nearby Observations

Detailed Forecast

This Afternoon
SSE wind around 7 kt. Mostly cloudy. Waves 1 ft or less.
Tonight
SE wind 13 to 15 kt becoming S after midnight. Mostly cloudy. Waves 1 to 2 ft.
Sunday
WNW wind 10 to 18 kt becoming N in the afternoon. Showers likely, mainly before 2pm. Waves 1 to 3 ft.
Sunday Night
N wind around 20 kt. A chance of showers before 8pm. Waves 4 to 5 ft.
Monday
NNW wind 16 to 18 kt. Partly sunny. Waves 3 to 4 ft.
Monday Night
N wind 7 to 11 kt becoming E after midnight. Mostly clear. Waves 1 to 2 ft.
Tuesday
SSW wind 14 to 17 kt. Partly sunny. Waves 1 to 3 ft.
Tuesday Night
SW wind 14 to 19 kt becoming NNW after midnight. Mostly cloudy. Waves 2 to 3 ft.
Wednesday
N wind 18 to 23 kt becoming ENE in the afternoon. Mostly cloudy. Waves 5 to 7 ft. occasionally to 9ft.



*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: 9:50 am EDT Mar 21, 2026
Forecast Valid: 1pm EDT Mar 21, 2026-6pm EDT Mar 27, 2026
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