RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 1531 CDT Tue May 26 2026 ...Whitewater Lake... .TONIGHT... Waves...............Nearly calm. Sky/Weather.........Partly cloudy. Min Temperature.....Around 59. Winds...............South winds up to 5 mph in the afternoon and evening becoming light. Water Temperature...71 degrees. UV Index............8 - Very High. .WEDNESDAY... Waves...............Nearly calm. Sky/Weather.........Mostly sunny. Max Temperature.....Around 87. Winds...............Northwest winds up to 5 mph shifting to the northeast in the afternoon. Water Temperature...71 degrees. UV Index............8 - Very High. .WEDNESDAY NIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Partly cloudy. Isolated thunderstorms. Min Temperature.....Lower 50s. Winds...............Northeast winds around 10 mph. .THURSDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Sunny. Max Temperature.....Mid 70s. Winds...............Northeast winds around 10 mph. .FRIDAY... Waves...............Nearly calm. Sky/Weather.........Sunny. Max Temperature.....Lower 80s. Winds...............Light winds becoming northwest around 5 mph in the afternoon. Sunrise: 05:22 AM CDT Sunset: 08:22 PM CDT $$