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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 35 °F
SSW 16kt
1-2ft
Sunday
High: 42 °F
SSW 17kt
2-3ft
Sunday Night
Low: 40 °F
S 15kt
2-3ft
Monday
High: 46 °F
SSW 14kt
1-2ft
Monday Night
Low: 42 °F
S 18kt
1-3ft
Tuesday
High: 51 °F
SSW 21kt
4-5ft
Tuesday Night
Low: 30 °F
NW 22kt
4-5ft
Wednesday
High: 34 °F
N 25kt
8-9ft
Wednesday Night
Low: 28 °F
NE 22kt
5-7ft

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 pm EDT Mar 28, 2026
Forecast Valid: 6pm EDT Mar 28, 2026-6pm EDT Apr 4, 2026

View Nearby Observations

Detailed Forecast

Tonight

SSW wind 10 to 16 kt. Mostly cloudy. Waves 1 to 2 ft.

Sunday

SSW wind 13 to 17 kt. Mostly cloudy. Waves 2 to 3 ft.

Sunday Night

S wind around 15 kt. Mostly cloudy. Waves 2 to 3 ft.

Monday

SSW wind 10 to 14 kt. Partly sunny. Waves 1 to 2 ft.

Monday Night

S wind 12 to 18 kt. A chance of rain, then rain likely and possibly a thunderstorm after 2am. Waves 1 to 3 ft.

Tuesday

SSW wind around 21 kt. Rain likely and possibly a thunderstorm before 8am, then rain likely between 8am and 2pm, then rain and possibly a thunderstorm after 2pm. Waves 4 to 5 ft.

Tuesday Night

WSW wind 20 to 22 kt becoming NW after midnight. Rain and possibly a thunderstorm before 8pm, then rain likely. Waves 4 to 5 ft.

Wednesday

N wind 23 to 25 kt. A chance of rain. Waves 8 to 9 ft. occasionally to 12ft.

Wednesday Night

NE wind 19 to 22 kt. Mostly cloudy. Waves 5 to 7 ft. occasionally to 9ft.

*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.