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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 24 °F
NW 14kt
1-3ft
Saturday
High: 36 °F
W 18kt
2-4ft
Saturday Night
Low: 34 °F
SSW 18kt
2-3ft
Sunday
High: 43 °F
SSW 19kt
3-4ft
Sunday Night
Low: 37 °F
SW 14kt
2ft
Monday
High: 46 °F
SSW 10kt
1ft
Monday Night
Low: 45 °F
SSE 20kt
4ft
Tuesday
High: 53 °F
SSW 23kt
4-5ft
Tuesday Night
Low: 33 °F
W 24kt
5-6ft

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 27, 2026
Forecast Valid: 6pm EDT Mar 27, 2026-6pm EDT Apr 3, 2026

View Nearby Observations

Detailed Forecast

Tonight

N wind 6 to 14 kt becoming W after midnight. A slight chance of snow between 11pm and 2am. Waves 1 to 3 ft.

Saturday

W wind 10 to 18 kt. Partly sunny. Waves 2 to 4 ft.

Saturday Night

SSW wind 13 to 18 kt. Mostly cloudy. Waves 2 to 3 ft.

Sunday

SSW wind 15 to 19 kt. Mostly cloudy. Waves 3 to 4 ft.

Sunday Night

SW wind 12 to 14 kt. Mostly cloudy. Waves around 2 ft.

Monday

SSW wind around 10 kt. Partly sunny. Waves around 1 ft.

Monday Night

ESE wind 13 to 20 kt becoming S after midnight. A chance of rain, then rain likely and possibly a thunderstorm after 2am. Waves 1 ft building to 4 ft.

Tuesday

SSW wind 21 to 23 kt. Rain likely and possibly a thunderstorm. Waves 4 to 5 ft.

Tuesday Night

SW wind 21 to 24 kt becoming WNW after midnight. Rain and possibly a thunderstorm before 2am, then rain likely. Waves 5 to 6 ft. occasionally to 8ft.

*Notices:

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.
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.