RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 317 CDT Mon Sep 15 2025 ...Rock Lake... .TODAY... Waves...............Half foot or less. Sky/Weather.........Sunny. Max Temperature.....Around 84. Winds...............Southeast winds 5 to 10 mph. Water Temperature...71 degrees. UV Index............6 - High. .TONIGHT... Waves...............Half foot or less. Sky/Weather.........Mostly clear. Min Temperature.....Around 56. Winds...............East winds up to 5 mph. Water Temperature...71 degrees. UV Index............6 - High. .TUESDAY... Waves...............Nearly calm. Sky/Weather.........Sunny. Max Temperature.....Mid 80s. Winds...............Southeast winds around 5 mph. .WEDNESDAY... Waves...............Nearly calm. Sky/Weather.........Sunny. Max Temperature.....Mid 80s. Winds...............Light winds becoming southeast around 5 mph in the afternoon. .THURSDAY... Waves...............Nearly calm. Sky/Weather.........Mostly sunny. Max Temperature.....Mid 80s. Winds...............Light winds becoming east around 5 mph in the afternoon. Sunrise: 06:34 AM CDT Sunset: 07:08 PM CDT $$