RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 316 CDT Tue Sep 15 2026 ...Lake Monona... .TODAY... Waves...............1 to 1.5 feet. Sky/Weather.........Mostly cloudy. Numerous showers and isolated thunderstorms until 2 PM. Max Temperature.....Around 74. Winds...............West winds 10 to 15 mph. Water Temperature...68 degrees. UV Index............4 - Moderate. .TONIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly cloudy until 11 PM, then partly cloudy. Min Temperature.....Around 55. Winds...............North winds up to 5 mph. Water Temperature...68 degrees. UV Index............4 - Moderate. .WEDNESDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Partly sunny. Max Temperature.....Lower 70s. Winds...............East winds around 5 mph. .THURSDAY... Waves...............Half foot or less. Sky/Weather.........Mostly cloudy. Slight chance of showers. Max Temperature.....Mid 70s. Winds...............North winds around 5 mph. .FRIDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly cloudy. Chance of showers. Max Temperature.....Mid 70s. Winds...............East winds around 10 mph. Sunrise: 06:36 AM CDT Sunset: 07:10 PM CDT $$