For More Weather Information:

Detroit/Pontiac, MI Local Forecast Office

4NM S Monroe MI

Marine Point Forecast

[NOTICE]

Overnight
Low: 54 °F
S 8kt
< 1ft
Saturday
High: 78 °F
SW 15kt
< 1ft
Saturday Night
Low: 58 °F
WSW 9kt
< 1ft
Sunday
High: 74 °F
⇑ESE 10kt
< 1ft
Sunday Night
Low: 62 °F
ESE 9kt
< 1ft
Monday
High: 86 °F
SSW 16kt
< 1ft
Monday Night
Low: 67 °F
SSW 13kt
< 1ft
Tuesday
High: 83 °F
SW 20kt
< 1ft
Tuesday Night
Low: 60 °F
SW 15kt
< 1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 9:49 pm EDT May 15, 2026
Forecast Valid: 11pm EDT May 15, 2026-6pm EDT May 22, 2026

View Nearby Observations

Detailed Forecast

Overnight

S wind around 8 kt. Mostly clear. Waves 1 ft or less.

Saturday

SSW wind 10 to 15 kt becoming WSW in the afternoon. Showers and thunderstorms likely before 2pm, then showers likely and possibly a thunderstorm between 2pm and 4pm, then a chance of showers and thunderstorms after 4pm. Waves 1 ft or less.

Saturday Night

WSW wind 5 to 9 kt. A chance of showers and thunderstorms before 1am, then a chance of showers after 2am. Waves 1 ft or less.

Sunday

Variable winds less than 5 kt becoming ESE 5 to 10 kt in the morning. A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Waves 1 ft or less.

Sunday Night

ESE wind around 9 kt becoming S after midnight. A chance of showers and thunderstorms before 8pm. Waves 1 ft or less.

Monday

SSW wind 9 to 16 kt, with gusts as high as 22 kt. Sunny. Waves 1 ft or less.

Monday Night

SSW wind 11 to 13 kt, with gusts as high as 20 kt. A chance of showers and thunderstorms after 2am. Waves 1 ft or less.

Tuesday

SW wind 14 to 20 kt. A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm after 2pm. Waves 1 ft or less.

Tuesday Night

SW wind 13 to 15 kt, with gusts as high as 21 kt. Showers likely and possibly a thunderstorm. Waves 1 ft or less.

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

The water temperature at Belle Isle is missing.

*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.