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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 36 °F
N 14kt
2ft
Saturday
High: 48 °F
ESE 18kt
2-3ft
Saturday Night
Low: 36 °F
WSW 17kt
2-3ft
Sunday
High: 38 °F
W 21kt
4ft
Sunday Night
Low: 33 °F
WNW 18kt
3-4ft
Monday
High: 37 °F
W 11kt
1-2ft
Monday Night
Low: 26 °F
⇑NNW 30kt
7ft
Tuesday
High: 32 °F
N 27kt⇓
10ft
Tuesday Night
Low: 28 °F
S 15kt
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: 8:35 pm EDT Apr 3, 2026
Forecast Valid: 10pm EDT Apr 3, 2026-6pm EDT Apr 10, 2026

View Nearby Observations

Detailed Forecast

Tonight

N wind 10 to 14 kt becoming ENE after midnight. Winds could gust as high as 22 kt. A slight chance of rain after 5am. Waves around 2 ft.

Saturday

ESE wind 14 to 18 kt, with gusts as high as 24 kt. Rain and thunderstorms before 10am, then rain and possibly a thunderstorm, mainly after 10am. Waves 2 to 3 ft.

Saturday Night

WSW wind 13 to 17 kt, with gusts as high as 23 kt. Rain and possibly a thunderstorm before 8pm, then a chance of rain between 8pm and 2am. Waves 2 to 3 ft.

Sunday

W wind 19 to 21 kt. Partly sunny. Waves around 4 ft.

Sunday Night

WNW wind 12 to 18 kt. Mostly cloudy. Waves 3 to 4 ft.

Monday

W wind 9 to 11 kt. A chance of rain and snow after 2pm. Waves 1 to 2 ft.

Monday Night

NNW wind 14 to 19 kt increasing to 25 to 30 kt after midnight. A chance of rain and snow before 8pm, then a chance of snow between 8pm and 2am. Waves 1 ft building to 7 ft.

Tuesday

N wind 22 to 27 kt decreasing to 13 to 18 kt in the afternoon. Partly sunny. Waves 10 ft subsiding to 6 ft.

Tuesday Night

E wind 6 to 15 kt becoming S after midnight. Mostly clear. Waves 2 to 3 ft.

*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.