For More Weather Information:

4NM S Monroe MI

[NOTICE]

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Last Update: 7:13 pm EDT Mar 18, 2026
Forecast Valid: 1am EDT Mar 19, 2026-6pm EDT Mar 25, 2026

Thursday

Variable winds 5 kt or less. A chance of rain before 11am. Waves 1 ft or less.

Thursday Night

Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.

Friday

S wind 6 to 11 kt becoming WSW in the afternoon. A chance of rain after 2pm. Waves 1 ft or less.

Friday Night

NNW wind 6 to 8 kt. A chance of rain before 8pm. Waves 1 ft or less.

Saturday

NNW wind 5 to 8 kt becoming S in the afternoon. Partly sunny. Waves 1 ft or less.

Saturday Night

S wind around 9 kt becoming WSW after midnight. Mostly cloudy. Waves 1 ft or less.

Sunday

W wind 10 to 14 kt becoming N in the afternoon. Winds could gust as high as 20 kt. A chance of rain before 2pm. Waves 1 ft or less.

Sunday Night

N wind 11 to 13 kt. Mostly cloudy. Waves 1 ft or less.

Monday

NNE wind around 11 kt. 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 34 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.