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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]
    • Sunday

      Sunday:SE wind 15 to 18 kt. Showers and thunderstorms before 3pm, then a chance of showers between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm.   Waves 2 to 4 ft.

      High: 49 °F

      SE 18kt
      2-4ft

    • Sunday Night

      Sunday Night:SSW wind 19 to 23 kt. Showers and thunderstorms likely, then showers after 3am.   Waves 4 to 5 ft.

      Low: 46 °FRising Temperatures

      SSW 23kt
      4-5ft

    • Monday

      Monday:WSW wind 14 to 20 kt. A chance of showers before 2pm.   Waves 3 to 5 ft.

      High: 51 °F

      WSW 20kt
      3-5ft

    • Monday Night

      Monday Night:S wind 8 to 14 kt. Showers and possibly a thunderstorm, mainly after 2am.   Waves around 1 ft.

      Low: 45 °F

      S 14kt
      1ft

    • Tuesday

      Tuesday:SW wind 15 to 18 kt. Showers and possibly a thunderstorm before 2pm, then showers likely between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm.   Waves 2 to 3 ft.

      High: 52 °F

      SW 18kt
      2-3ft

    • Tuesday Night

      Tuesday Night:SW wind 10 to 12 kt. Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am.   Waves 2 to 3 ft.

      Low: 41 °F

      SW 12kt
      2-3ft

    • Wednesday

      Wednesday:N wind around 12 kt becoming WSW in the afternoon. A chance of showers and thunderstorms, then showers likely after 8am.   Waves 3 to 4 ft.

      High: 49 °F

      N 12kt
      3-4ft

    • Wednesday Night

      Wednesday Night:SSW wind 12 to 16 kt. Showers.   Waves around 2 ft.

      Low: 44 °F

      SSW 16kt
      2ft

    • Thursday

      Thursday:S wind 16 to 20 kt. Showers, with thunderstorms also possible after 2pm.   Waves 2 to 3 ft.

      High: 51 °F

      S 20kt
      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: 2:24 am EDT Apr 12, 2026
Forecast Valid: 3am EDT Apr 12, 2026-6pm EDT Apr 18, 2026

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Detailed Forecast

Sunday
SE wind 15 to 18 kt. Showers and thunderstorms before 3pm, then a chance of showers between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Waves 2 to 4 ft.
Sunday Night
SSW wind 19 to 23 kt. Showers and thunderstorms likely, then showers after 3am. Waves 4 to 5 ft.
Monday
WSW wind 14 to 20 kt. A chance of showers before 2pm. Waves 3 to 5 ft.
Monday Night
S wind 8 to 14 kt. Showers and possibly a thunderstorm, mainly after 2am. Waves around 1 ft.
Tuesday
SW wind 15 to 18 kt. Showers and possibly a thunderstorm before 2pm, then showers likely between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Waves 2 to 3 ft.
Tuesday Night
SW wind 10 to 12 kt. Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Waves 2 to 3 ft.
Wednesday
N wind around 12 kt becoming WSW in the afternoon. A chance of showers and thunderstorms, then showers likely after 8am. Waves 3 to 4 ft.
Wednesday Night
SSW wind 12 to 16 kt. Showers. Waves around 2 ft.
Thursday
S wind 16 to 20 kt. Showers, with thunderstorms also possible after 2pm. 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: 2:24 am EDT Apr 12, 2026
Forecast Valid: 3am EDT Apr 12, 2026-6pm EDT Apr 18, 2026
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