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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]
    • Tonight

      Tonight:N wind 10 to 16 kt. Mostly cloudy. Waves around 2 ft.

      Low: 33 °F

      N 16kt
      2ft

    • Saturday

      Saturday:N wind 5 to 7 kt becoming SSE in the afternoon. Partly sunny. Waves 1 ft or less.

      High: 40 °F

      N 7kt
      < 1ft

    • Saturday Night

      Saturday Night:S wind 12 to 14 kt. Mostly cloudy. Waves 1 to 2 ft.

      Low: 39 °F

      S 14kt
      1-2ft

    • Sunday

      Sunday:NW wind 11 to 17 kt becoming N in the afternoon. A chance of rain after 8am.   Waves 2 to 3 ft.

      High: 40 °F

      N 17kt
      2-3ft

    • Sunday Night

      Sunday Night:N wind 18 to 20 kt. Mostly cloudy. Waves around 4 ft.

      Low: 29 °F

      N 20kt
      4ft

    • Monday

      Monday:N wind around 18 kt. Mostly cloudy, then gradually becoming sunny. Waves around 4 ft.

      High: 31 °F

      N 18kt
      4ft

    • Monday Night

      Monday Night:N wind 8 to 13 kt. Mostly clear. Waves 2 to 3 ft.

      Low: 28 °F

      N 13kt
      2-3ft

    • Tuesday

      Tuesday:S wind 15 to 18 kt. Partly sunny. Waves 2 to 3 ft.

      High: 38 °F

      S 18kt
      2-3ft

    • Tuesday Night

      Tuesday Night:SW wind 14 to 23 kt becoming NW after midnight. Mostly cloudy. Waves 2 to 3 ft.

      Low: 30 °F

      NW 23kt
      2-3ft


High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:24 pm EDT Mar 20, 2026
Forecast Valid: 8pm EDT Mar 20, 2026-6pm EDT Mar 27, 2026

View Nearby Observations

Detailed Forecast

Tonight
N wind 10 to 16 kt. Mostly cloudy. Waves around 2 ft.
Saturday
N wind 5 to 7 kt becoming SSE in the afternoon. Partly sunny. Waves 1 ft or less.
Saturday Night
S wind 12 to 14 kt. Mostly cloudy. Waves 1 to 2 ft.
Sunday
NW wind 11 to 17 kt becoming N in the afternoon. A chance of rain after 8am. Waves 2 to 3 ft.
Sunday Night
N wind 18 to 20 kt. Mostly cloudy. Waves around 4 ft.
Monday
N wind around 18 kt. Mostly cloudy, then gradually becoming sunny. Waves around 4 ft.
Monday Night
N wind 8 to 13 kt. Mostly clear. Waves 2 to 3 ft.
Tuesday
S wind 15 to 18 kt. Partly sunny. Waves 2 to 3 ft.
Tuesday Night
SW wind 14 to 23 kt becoming NW after midnight. Mostly cloudy. Waves 2 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: 4:24 pm EDT Mar 20, 2026
Forecast Valid: 8pm EDT Mar 20, 2026-6pm EDT Mar 27, 2026
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