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Detroit/Pontiac, MI Local Forecast Office

4NM E Port Sanilac MI

Marine Point Forecast

[NOTICE]

Today
High: 50 °F
NNW 13kt
< 1ft

Small Craft Advisory
Tonight
Low: 41 °F
NE 8kt
< 1ft
Wednesday
High: 51 °F
ENE 10kt
1ft
Wednesday Night
Low: 45 °F
ENE 10kt
1ft
Thursday
High: 55 °F
E 10kt
1ft
Thursday Night
Low: 45 °F
NNE 10kt
1ft
Friday
High: 53 °F
E 15kt
2ft
Friday Night
Low: 43 °F
NNE 18kt
3-4ft
Saturday
High: 48 °F
N 19kt
5ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 8:49 am EDT Apr 22, 2025
Forecast Valid: 9am EDT Apr 22, 2025-6pm EDT Apr 28, 2025

View Nearby Observations

Detailed Forecast

Today

NNW wind 7 to 13 kt, with gusts as high as 22 kt. Sunny. Waves 1 ft or less.

Tonight

E wind 5 to 8 kt becoming NE after midnight. Mostly cloudy. Waves 1 ft or less.

Wednesday

ENE wind around 10 kt. Mostly sunny. Waves around 1 ft.

Wednesday Night

ENE wind 8 to 10 kt becoming S after midnight. Increasing clouds. Waves around 1 ft.

Thursday

SSE wind around 10 kt becoming E in the afternoon. Partly sunny. Waves around 1 ft.

Thursday Night

NNE wind around 10 kt. Mostly cloudy. Waves around 1 ft.

Friday

E wind 12 to 15 kt. Showers likely, mainly after 2pm. Waves around 2 ft.

Friday Night

NNE wind 16 to 18 kt. Showers likely and possibly a thunderstorm before 8pm, then a chance of rain and thunderstorms between 8pm and 2am, then a chance of rain after 2am. Waves 3 to 4 ft.

Saturday

N wind around 19 kt. Partly sunny. Waves around 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.