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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Sunday
High: 72 °F
WSW 8kt⇓
< 1ft
Sunday Night
Low: 73 °F
SSW 8kt
< 1ft
Monday
High: 77 °F
WNW 7kt
< 1ft
Monday Night
Low: 72 °F
S 7kt
< 1ft
Tuesday
High: 79 °F
Light Wind
< 1ft
Tuesday Night
Low: 72 °F
S 9kt
< 1ft
Wednesday
High: 77 °F
S 9kt
1ft
Wednesday Night
Low: 70 °F
S 12kt
1ft
Thursday
High: 73 °F
WSW 12kt
1-2ft

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 Jul 13, 2025
Forecast Valid: 4am EDT Jul 13, 2025-6pm EDT Jul 19, 2025

View Nearby Observations

Detailed Forecast

Sunday

WSW wind 5 to 8 kt becoming variable and less than 5 kt in the afternoon. Mostly sunny. Waves 1 ft or less.

Sunday Night

ESE wind 5 to 8 kt becoming SW after midnight. Partly cloudy. Waves 1 ft or less.

Monday

WNW wind 5 to 7 kt becoming S in the afternoon. Sunny. Waves 1 ft or less.

Monday Night

S wind 5 to 7 kt. Mostly clear. Waves 1 ft or less.

Tuesday

Variable winds 5 kt or less. Sunny. Waves 1 ft or less.

Tuesday Night

S wind 7 to 9 kt. Partly cloudy. Waves 1 ft or less.

Wednesday

S wind around 9 kt. A chance of showers after 2pm. Waves around 1 ft.

Wednesday Night

S wind 9 to 12 kt. A chance of showers. Waves around 1 ft.

Thursday

WSW wind around 12 kt becoming NW in the afternoon. Winds could gust as high as 18 kt. A chance of showers, with thunderstorms also possible after 2pm. Waves 1 to 2 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.