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Detroit/Pontiac, MI Local Forecast Office

4NM S Monroe MI

Marine Point Forecast

[NOTICE]

Tonight
Low: 62 °F
WSW 11kt
< 1ft
Tuesday
High: 75 °F
SW 16kt
< 1ft
Tuesday Night
Low: 60 °F
SW 12kt
< 1ft
Wednesday
High: 68 °F
WSW 12kt
< 1ft
Wednesday Night
Low: 59 °F
SSW 8kt
< 1ft
Thursday
High: 70 °F
SW 14kt
< 1ft
Thursday Night
Low: 55 °F
SW 10kt
< 1ft
Friday
High: 69 °F
E 8kt
< 1ft
Friday Night
Low: 54 °F
ESE 9kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 4:24 pm EDT Apr 13, 2026
Forecast Valid: 6pm EDT Apr 13, 2026-6pm EDT Apr 20, 2026

View Nearby Observations

Detailed Forecast

Tonight

WSW wind 8 to 11 kt becoming S after midnight. A chance of showers and thunderstorms, mainly after 9pm. Waves 1 ft or less.

Tuesday

SW wind 13 to 16 kt, with gusts as high as 22 kt. A chance of showers and thunderstorms, mainly after 4pm. Waves 1 ft or less.

Tuesday Night

SW wind around 12 kt, with gusts as high as 18 kt. A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 5am, then showers after 5am. Waves 1 ft or less.

Wednesday

WSW wind around 12 kt. Showers, with thunderstorms also possible after 5pm. Waves 1 ft or less.

Wednesday Night

SSW wind around 8 kt. Showers and possibly a thunderstorm. Waves 1 ft or less.

Thursday

SW wind 10 to 14 kt. A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Thursday Night

SW wind 8 to 10 kt. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Waves 1 ft or less.

Friday

WNW wind around 8 kt becoming ESE in the afternoon. Mostly sunny. Waves 1 ft or less.

Friday Night

ESE wind 7 to 9 kt. A chance of showers. Waves 1 ft or less.

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

The water temperature at Belle Isle is 48 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.