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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Sunday
High: 42 °F
SSW 17kt
2-3ft
Sunday Night
Low: 40 °F
SSW 16kt
2-3ft
Monday
High: 42 °F
SSW 14kt
1-2ft
Monday Night
Low: 41 °F
S 16kt
1-3ft
Tuesday
High: 47 °F
SSW 19kt
4-5ft
Tuesday Night
Low: 32 °F
WNW 21kt
4-5ft
Wednesday
High: 35 °F
N 22kt
8-9ft
Wednesday Night
Low: 31 °F
NE 22kt
5-7ft
Thursday
High: 39 °F
ENE 21kt
3-5ft

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 Mar 29, 2026
Forecast Valid: 2am EDT Mar 29, 2026-6pm EDT Apr 4, 2026

View Nearby Observations

Detailed Forecast

Sunday

SSW wind 14 to 17 kt. Mostly cloudy. Waves 2 to 3 ft.

Sunday Night

SSW wind around 16 kt. Mostly cloudy during the early evening, then becoming mostly clear. Waves 2 to 3 ft.

Monday

SSW wind 9 to 14 kt. Partly sunny. Waves 1 to 2 ft.

Monday Night

S wind 11 to 16 kt. A chance of rain, then rain likely and possibly a thunderstorm after 2am. Waves 1 to 3 ft.

Tuesday

SSW wind 16 to 19 kt. Rain and possibly a thunderstorm before 11am, then rain between 11am and 5pm, then rain and possibly a thunderstorm after 5pm. Waves 4 to 5 ft.

Tuesday Night

SW wind 19 to 21 kt becoming NW after midnight. Rain and possibly a thunderstorm. Waves 4 to 5 ft.

Wednesday

N wind around 22 kt. A chance of rain before 8am. 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.

Thursday

ENE wind 18 to 21 kt. A chance of snow before 8am, then a chance of rain and snow. Waves 3 to 5 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.