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Detroit/Pontiac, MI Local Forecast Office

12NM N Port Sanilac MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 71 °F
SSE 14kt
1-3ft
Sunday
High: 76 °F
SSE 11kt
1-2ft
Sunday Night
Low: 68 °F
NNW 15kt
1-2ft
Monday
High: 71 °F
N 13kt
2ft
Monday Night
Low: 66 °F
Light Wind
< 1ft
Tuesday
High: 77 °F
SW 11kt
< 1ft
Tuesday Night
Low: 67 °F
WSW 10kt
< 1ft
Wednesday
High: 70 °F
N 13kt
1ft
Wednesday Night
Low: 64 °F
N 11kt
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: 4:25 pm EDT Aug 15, 2026
Forecast Valid: 9pm EDT Aug 15, 2026-6pm EDT Aug 22, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSE wind 7 to 14 kt. Partly cloudy. Waves 1 to 3 ft.

Sunday

SSE wind 6 to 11 kt. A slight chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Waves 1 to 2 ft.

Sunday Night

NNW wind 6 to 15 kt. Showers and thunderstorms likely before 8pm, then a chance of showers between 8pm and 10pm. Waves 1 to 2 ft.

Monday

N wind 11 to 13 kt. Mostly cloudy, then gradually becoming sunny. Waves around 2 ft.

Monday Night

Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Tuesday

SW wind 7 to 11 kt. Mostly sunny. Waves 1 ft or less.

Tuesday Night

WSW wind around 10 kt becoming WNW after midnight. A chance of showers and thunderstorms between 8pm and 2am, then showers likely after 2am. Waves 1 ft or less.

Wednesday

N wind 9 to 13 kt, with gusts as high as 19 kt. Showers likely. Waves around 1 ft.

Wednesday Night

N wind around 11 kt. A chance of showers. Waves 2 to 3 ft.

See Lake Huron Open Lake Forecast for days 3 through 5.

*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.