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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Today
High: 25 °F
WNW 31kt⇓
12ft
Tonight
Low: 23 °F
W 14kt
2-4ft
Wednesday
High: 35 °F
S 22kt
5ft
Wednesday Night
Low: 34 °F
S 20kt
3-4ft
Thursday
High: 38 °F
SW 12kt
1-2ft
Thursday Night
Low: 35 °F
SSE 10kt
1ft
Friday
High: 40 °F
SSW 12kt
2ft
Friday Night
Low: 33 °F
NNE 17kt
5ft
Saturday
High: 40 °F
E 21kt
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 am EDT Mar 17, 2026
Forecast Valid: 5am EDT Mar 17, 2026-6pm EDT Mar 23, 2026

View Nearby Observations

Detailed Forecast

Today

WNW wind 26 to 31 kt decreasing to 18 to 23 kt in the afternoon. A slight chance of snow showers after 2pm. Widespread freezing spray. Waves 12 ft subsiding to 6 ft.

Tonight

W wind around 14 kt. A slight chance of snow showers between 7pm and 8pm. Widespread freezing spray before 7pm. Waves 2 to 4 ft.

Wednesday

S wind 15 to 22 kt. Mostly cloudy. Waves 2 ft building to 5 ft.

Wednesday Night

S wind 16 to 20 kt. Mostly cloudy. Waves 3 to 4 ft.

Thursday

SW wind 10 to 12 kt. A chance of rain. Waves 1 to 2 ft.

Thursday Night

NW wind 8 to 10 kt becoming SE in the evening. Mostly cloudy. Waves around 1 ft.

Friday

SSW wind around 12 kt. A chance of rain after 2pm. Waves around 2 ft.

Friday Night

NNE wind 12 to 17 kt. A chance of rain. Waves 2 ft building to 5 ft.

Saturday

E wind 18 to 21 kt becoming SE in the afternoon. Partly sunny. 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.