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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Today
High: 35 °F
NW 23kt
8ft
Tonight
Low: 31 °F
S 17kt
2-3ft
Friday
High: 40 °F
S 36kt
11ft
Friday Night
Low: 27 °F
WNW 33kt
9-10ft
Saturday
High: 31 °F
NW 21kt⇓
7ft
Saturday Night
Low: 28 °F
ESE 13kt
1-2ft
Sunday
High: 45 °F
E 27kt
7ft
Sunday Night
Low: 30 °F
S 35kt
12ft
Monday
High: 38 °F
WSW 38kt
12ft

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 am EDT Mar 12, 2026
Forecast Valid: 7am EDT Mar 12, 2026-6pm EDT Mar 18, 2026

View Nearby Observations

Detailed Forecast

Today

NW wind 15 to 23 kt, with gusts as high as 29 kt. Partly sunny. Waves 8 ft subsiding to 5 ft.

Tonight

NW wind 7 to 17 kt becoming S after midnight. Snow likely, mainly after 5am. Waves 2 to 3 ft.

Friday

S wind 29 to 36 kt becoming WSW in the afternoon. Winds could gust as high as 47 kt. Rain and snow before noon, then rain between noon and 2pm, then a chance of rain and snow after 2pm. Waves 11 ft subsiding to 8 ft.

Friday Night

WNW wind 29 to 33 kt, with gusts as high as 41 kt. A chance of rain and snow before 8pm. Waves 9 to 10 ft. occasionally to 13ft.

Saturday

NW wind 16 to 21 kt decreasing to 10 to 15 kt in the afternoon. Partly sunny. Waves 7 ft subsiding to 4 ft.

Saturday Night

ESE wind 7 to 13 kt. A chance of snow after 2am. Waves 1 to 2 ft.

Sunday

E wind 21 to 27 kt. Snow before 2pm, then rain and snow. Waves 4 ft building to 7 ft.

Sunday Night

SE wind 32 to 35 kt becoming S after midnight. Winds could gust as high as 41 kt. Rain before 2am, then rain and snow. Waves 9 ft building to 12 ft.

Monday

WSW wind 36 to 38 kt. Snow, possibly mixed with rain, mainly before 8am. Waves around 12 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.