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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 18 °F
NNE 17kt
2ft
Monday
High: 18 °F
WNW 20kt
3-5ft
Monday Night
Low: 10 °F
SSW 24kt
4-5ft
Tuesday
High: 20 °F
SSW 25kt
3-5ft
Tuesday Night
Low: 13 °F
WNW 22kt
3-4ft
Wednesday
High: 19 °F
W 16kt
2-3ft
Wednesday Night
Low: 12 °F
W 17kt
1-3ft
Thursday
High: 16 °F
NW 18kt
4ft
Thursday Night
Low: 12 °F
NW 19kt
5ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:13 pm EST Jan 25, 2026
Forecast Valid: 8pm EST Jan 25, 2026-6pm EST Feb 1, 2026

View Nearby Observations

Detailed Forecast

Tonight

NNE wind 11 to 17 kt. Snow showers. Waves around 2 ft.

Monday

N wind 12 to 20 kt becoming WNW in the afternoon. Scattered snow showers, mainly before 11am. Widespread freezing spray between 11am and 4pm. Waves 3 to 5 ft.

Monday Night

W wind 20 to 24 kt becoming SSW after midnight. Widespread freezing spray after 4am. Increasing clouds. Waves 4 to 5 ft.

Tuesday

SSW wind 21 to 25 kt becoming WNW in the afternoon. Scattered snow showers. Widespread freezing spray before 1pm. Waves 3 to 5 ft.

Tuesday Night

WNW wind 18 to 22 kt. Mostly cloudy. Waves 3 to 4 ft.

Wednesday

W wind 14 to 16 kt. Mostly cloudy. Waves 2 to 3 ft.

Wednesday Night

W wind 13 to 17 kt. Mostly cloudy. Waves 1 to 3 ft.

Thursday

NW wind around 18 kt. Mostly cloudy. Waves around 4 ft.

Thursday Night

NW wind around 19 kt. Mostly cloudy. Waves around 5 ft.

Wave heights are for ice free areas.

*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.