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Detroit/Pontiac, MI Local Forecast Office

4NM S Monroe MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 58 °F
Light Wind
< 1ft
Saturday
High: 56 °F
N 10kt
< 1ft
Saturday Night
Low: 45 °F
NNE 9kt
< 1ft
Sunday
High: 57 °F
E 11kt
< 1ft
Sunday Night
Low: 47 °F
E 9kt
< 1ft
Monday
High: 64 °F
E 13kt
< 1ft
Monday Night
Low: 56 °F
SSE 17kt
< 1ft
Tuesday
High: 68 °F
S 19kt
< 1ft
Tuesday Night
Low: 48 °F
WNW 11kt
< 1ft

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 pm EDT Apr 24, 2026
Forecast Valid: 9pm EDT Apr 24, 2026-6pm EDT May 1, 2026

View Nearby Observations

Detailed Forecast

Tonight

Variable winds 5 kt or less. Showers and possibly a thunderstorm before 2am, then isolated showers between 2am and 3am. Waves 1 ft or less.

Saturday

NNW wind 7 to 10 kt becoming NNE in the afternoon. Mostly cloudy. Waves 1 ft or less.

Saturday Night

NNE wind around 9 kt. Mostly cloudy. Waves 1 ft or less.

Sunday

E wind 9 to 11 kt. Mostly sunny. Waves 1 ft or less.

Sunday Night

E wind around 9 kt. Mostly clear. Waves 1 ft or less.

Monday

E wind 8 to 13 kt. Mostly sunny. Waves 1 ft or less.

Monday Night

SSE wind around 17 kt, with gusts as high as 26 kt. Showers likely after 2am. Waves 1 ft or less.

Tuesday

S wind 17 to 19 kt becoming WSW in the afternoon. Winds could gust as high as 26 kt. Showers likely before 8am, then a chance of showers and thunderstorms between 8am and 2pm. Waves 1 ft or less.

Tuesday Night

WNW wind 6 to 11 kt. Partly cloudy. Waves 1 ft or less.

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

The water temperature at Belle Isle is 53 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.