RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 318 CDT Tue Jul 21 2026 ...Lake Wisconsin... .TODAY... Waves...............1.5 to 2 feet. Sky/Weather.........Mostly sunny. Max Temperature.....Around 81. Winds...............Northwest winds 10 to 15 mph. Water Temperature...73 degrees. UV Index............4 - Moderate. .TONIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Partly cloudy. Min Temperature.....Around 54. Winds...............North winds 5 to 10 mph. Water Temperature...73 degrees. UV Index............4 - Moderate. .WEDNESDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly sunny. Max Temperature.....Mid 70s. Winds...............North winds around 5 mph. .THURSDAY... Waves...............Nearly calm. Sky/Weather.........Sunny. Max Temperature.....Upper 70s. Winds...............Southwest winds around 5 mph. .FRIDAY... Waves...............Half foot or less. Sky/Weather.........Sunny. Max Temperature.....Lower 80s. Winds...............Southwest winds around 5 mph. Sunrise: 05:37 AM CDT Sunset: 08:32 PM CDT $$