For More Weather Information:

Detroit/Pontiac, MI Local Forecast Office

4NM S Monroe MI

Marine Point Forecast

[NOTICE]

Today
High: 65 °F
W 16kt
< 1ft
Tonight
Low: 38 °F
W 15kt
< 1ft
Sunday
High: 51 °F
W 16kt
< 1ft
Sunday Night
Low: 30 °F
NNW 12kt
< 1ft
Monday
High: 46 °F
NNW 8kt
< 1ft
Monday Night
Low: 38 °F
S 9kt
< 1ft
Tuesday
High: 66 °F
S 16kt
< 1ft
Tuesday Night
Low: 49 °F
WSW 9kt
< 1ft
Wednesday
High: 63 °F
N 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: 9:35 am EDT Apr 18, 2026
Forecast Valid: 10am EDT Apr 18, 2026-6pm EDT Apr 24, 2026

View Nearby Observations

Detailed Forecast

Today

SW wind 11 to 16 kt becoming WNW in the afternoon. Winds could gust as high as 24 kt. Showers and possibly a thunderstorm before 3pm, then a slight chance of showers after 5pm. Waves 1 ft or less.

Tonight

W wind 9 to 15 kt, with gusts as high as 23 kt. Mostly cloudy, then gradually becoming mostly clear. Waves 1 ft or less.

Sunday

W wind 10 to 16 kt. A chance of showers after 2pm. Waves 1 ft or less.

Sunday Night

NNW wind 8 to 12 kt, with gusts as high as 18 kt. A chance of showers before 8pm. Waves 1 ft or less.

Monday

NNW wind around 8 kt. Sunny. Waves 1 ft or less.

Monday Night

S wind 5 to 9 kt. Partly cloudy. Waves 1 ft or less.

Tuesday

S wind 12 to 16 kt. Mostly sunny. Waves 1 ft or less.

Tuesday Night

WSW wind 7 to 9 kt. Mostly cloudy. Waves 1 ft or less.

Wednesday

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

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

The water temperature at Belle Isle is 52 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.