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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 38 °F
N 11kt
1ft
Tonight
Low: 34 °F
NNW 12kt
1ft
Saturday
High: 38 °F
NNW 9kt⇓
1ft
Saturday Night
Low: 35 °F
SE 12kt
< 1ft
Sunday
High: 50 °F
SSE 20kt
3-4ft
Sunday Night
Low: 48 °F
SSW 25kt
5-7ft
Monday
High: 53 °F
WSW 22kt
4-6ft
Monday Night
Low: 45 °F
W 13kt
1-2ft
Tuesday
High: 53 °F
S 20kt
3-4ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 11:13 am EDT Apr 10, 2026
Forecast Valid: 12pm EDT Apr 10, 2026-6pm EDT Apr 16, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

N wind around 11 kt. Mostly cloudy. Waves around 1 ft.

Tonight

NNW wind 10 to 12 kt. Mostly cloudy. Waves around 1 ft.

Saturday

NNW wind 5 to 9 kt becoming variable and less than 5 kt in the afternoon. Sunny. Waves around 1 ft.

Saturday Night

ENE wind 5 to 12 kt becoming SE after midnight. A chance of showers after 2am. Waves 1 ft or less.

Sunday

SSE wind 17 to 20 kt. Showers likely, mainly between 8am and 2pm. Waves 3 to 4 ft.

Sunday Night

SSW wind 21 to 25 kt. Showers likely after 8pm. Waves 5 to 7 ft. occasionally to 9ft.

Monday

WSW wind 17 to 22 kt. A chance of showers before 2pm. Waves 4 to 6 ft. occasionally to 8ft.

Monday Night

W wind around 13 kt becoming SSE in the evening. A chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Waves 1 to 2 ft.

Tuesday

S wind 17 to 20 kt. Showers likely and possibly a thunderstorm. Waves 3 to 4 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.