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Detroit/Pontiac, MI Local Forecast Office

4NM S Monroe MI

Marine Point Forecast

[NOTICE]

Today
High: 63 °F
W 16kt
< 1ft
Tonight
Low: 38 °F
WNW 13kt
< 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: 4:25 am EDT Apr 18, 2026
Forecast Valid: 8am EDT Apr 18, 2026-6pm EDT Apr 24, 2026

View Nearby Observations

Detailed Forecast

Today

SSW wind 14 to 16 kt becoming W in the afternoon. Showers and thunderstorms before 3pm, then a slight chance of showers after 5pm. Waves 1 ft or less.

Tonight

WNW wind 9 to 13 kt, with gusts as high as 19 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.