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Detroit/Pontiac, MI Local Forecast Office

4NM S Monroe MI

Marine Point Forecast

[NOTICE]

Today
High: 41 °F
WNW 12kt⇓
< 1ft
Tonight
Low: 35 °F
ESE 15kt
< 1ft
Sunday
High: 63 °F
S 18kt
< 1ft
Sunday Night
Low: 37 °F
S 23kt
< 1ft
Monday
High: 49 °F
WSW 24kt
< 1ft
Monday Night
Low: 19 °F
W 24kt
< 1ft
Tuesday
High: 27 °F
WNW 17kt
< 1ft
Tuesday Night
Low: 20 °F
W 13kt
< 1ft
Wednesday
High: 37 °F
S 13kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 5:13 am EDT Mar 14, 2026
Forecast Valid: 6am EDT Mar 14, 2026-6pm EDT Mar 20, 2026

View Nearby Observations

Detailed Forecast

Today

WNW wind 7 to 12 kt becoming variable and less than 5 kt in the afternoon. Winds could gust as high as 18 kt. Mostly sunny. Waves 1 ft or less.

Tonight

ESE wind 8 to 15 kt, with gusts as high as 22 kt. A chance of snow before 4am, then a slight chance of rain and snow between 4am and 5am, then a slight chance of snow after 5am. Waves 1 ft or less.

Sunday

ESE wind 14 to 18 kt becoming S in the afternoon. Winds could gust as high as 26 kt. Mostly cloudy. Waves 1 ft or less.

Sunday Night

S wind 20 to 23 kt, with gusts as high as 34 kt. Rain, mainly after 2am. Waves 1 ft or less.

Monday

WSW wind 20 to 24 kt, with gusts as high as 32 kt. Rain, mainly before 8am. Waves 1 ft or less.

Monday Night

W wind 20 to 24 kt, with gusts as high as 32 kt. Mostly cloudy. Waves 1 ft or less.

Tuesday

WNW wind around 17 kt, with gusts as high as 24 kt. Mostly cloudy. Waves 1 ft or less.

Tuesday Night

W wind 7 to 13 kt. Mostly cloudy. Waves 1 ft or less.

Wednesday

S wind 9 to 13 kt. A chance of snow. Waves 1 ft or less.

See Lake Erie Open Lake Forecast for days 3 through 5.

The water temperature at Belle Isle is 38 degrees.

*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.