RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 1530 CDT Thu Jun 18 2026 ...Lake Monona... .TONIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly sunny until 11 PM, then mostly clear. Slight chance of rain showers after 5 PM until 5 AM. Min Temperature.....Around 54. Winds...............Northwest winds 5 to 10 mph. Water Temperature...60 degrees. UV Index............9 - Very High. .FRIDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Sunny until 5 PM, then partly sunny. Slight chance of thunderstorms after 5 PM. Max Temperature.....Around 76. Winds...............West winds 5 to 10 mph. Water Temperature...60 degrees. UV Index............9 - Very High. .FRIDAY NIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Partly cloudy. Chance of showers and slight chance of thunderstorms. Min Temperature.....Mid 50s. Winds...............West winds around 5 mph. .SATURDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly sunny. Max Temperature.....Upper 70s. Winds...............Northwest winds around 10 mph. .SUNDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly cloudy. Chance of showers. Max Temperature.....Lower 70s. Winds...............East winds 5 to 10 mph. Sunrise: 05:18 AM CDT Sunset: 08:40 PM CDT $$