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Detroit/Pontiac, MI Local Forecast Office

18NM ENE Port Sanilac MI

Marine Point Forecast

[NOTICE]

Today
High: 77 °F
S 6kt
< 1ft
Tonight
Low: 72 °F
S 10kt
< 1ft
Wednesday
High: 78 °F
SSE 7kt
< 1ft
Wednesday Night
Low: 70 °F
SSE 11kt
< 1ft
Thursday
High: 74 °F
NNW 13kt
1ft
Thursday Night
Low: 64 °F
N 15kt
3ft
Friday
High: 69 °F
N 12kt
1-2ft
Friday Night
Low: 67 °F
N 11kt
1ft
Saturday
High: 74 °F
ESE 7kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:49 am EDT Jul 15, 2025
Forecast Valid: 10am EDT Jul 15, 2025-6pm EDT Jul 21, 2025

View Nearby Observations

Detailed Forecast

Today

S wind around 6 kt. Sunny. Waves 1 ft or less.

Tonight

S wind 6 to 10 kt. Mostly clear. Waves 1 ft or less.

Wednesday

SSE wind around 7 kt. Sunny. Waves 1 ft or less.

Wednesday Night

SSE wind 8 to 11 kt. A chance of showers and thunderstorms between 8pm and 5am, then a chance of showers after 5am. Waves 1 ft or less.

Thursday

SW wind 10 to 13 kt becoming NNW in the afternoon. Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 5pm, then showers likely after 5pm. Waves around 1 ft.

Thursday Night

N wind around 15 kt. Cloudy, then gradually becoming partly cloudy. Waves around 3 ft.

Friday

N wind 10 to 12 kt. Sunny. Waves 1 to 2 ft.

Friday Night

N wind 7 to 11 kt becoming E after midnight. Partly cloudy. Waves around 1 ft.

Saturday

ESE wind around 7 kt becoming S in the afternoon. Mostly sunny. Waves 1 ft or less.

*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.