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Detroit/Pontiac, MI Local Forecast Office

4NM S Monroe MI

Marine Point Forecast

[NOTICE]

This Afternoon
High: 48 °F
SE 7kt
< 1ft
Tonight
Low: 42 °F
ESE 9kt
< 1ft
Sunday
High: 72 °F
SSW 13kt
< 1ft
Sunday Night
Low: 60 °F
SSW 14kt
< 1ft
Monday
High: 71 °F
SW 17kt
< 1ft
Monday Night
Low: 60 °F
SSW 10kt
< 1ft
Tuesday
High: 76 °F
SW 15kt
< 1ft
Tuesday Night
Low: 61 °F
SW 11kt
< 1ft
Wednesday
High: 73 °F
WSW 16kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 2:24 pm EDT Apr 11, 2026
Forecast Valid: 4pm EDT Apr 11, 2026-6pm EDT Apr 17, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SE wind around 7 kt. Sunny. Waves 1 ft or less.

Tonight

ESE wind 7 to 9 kt. Increasing clouds. Waves 1 ft or less.

Sunday

SE wind 9 to 13 kt becoming SSW in the afternoon. Winds could gust as high as 19 kt. A chance of showers before noon. Waves 1 ft or less.

Sunday Night

SSW wind around 14 kt, with gusts as high as 22 kt. A chance of showers after 2am. Waves 1 ft or less.

Monday

SW wind around 17 kt, with gusts as high as 23 kt. Showers likely, mainly between 8am and 2pm. Waves 1 ft or less.

Monday Night

SSW wind around 10 kt. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Waves 1 ft or less.

Tuesday

SW wind 12 to 15 kt, with gusts as high as 21 kt. Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 2pm. Waves 1 ft or less.

Tuesday Night

SW wind around 11 kt. A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Waves 1 ft or less.

Wednesday

WSW wind 13 to 16 kt. Showers likely. Waves 1 ft or less.

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

The water temperature at Belle Isle is 45 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.