RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 317 CDT Sun Jul 6 2025 ...Lake Mendota... .TODAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly cloudy until 2 PM, then mostly sunny. Slight chance of thunderstorms after 11 AM. Max Temperature.....Around 80. Winds...............North winds 5 to 10 mph. Water Temperature...77 degrees. UV Index............7 - High. .TONIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly clear. Patchy fog after 5 AM. Min Temperature.....Around 60. Winds...............Northeast winds 5 to 10 mph. Water Temperature...77 degrees. UV Index............7 - High. .MONDAY... Waves...............Nearly calm. Sky/Weather.........Mostly sunny. Max Temperature.....Lower 80s. Winds...............North winds around 5 mph. .TUESDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Partly sunny. Chance of showers in the morning. Chance of thunderstorms through the day. Max Temperature.....Mid 80s. Winds...............Southwest winds around 5 mph. .WEDNESDAY... Waves...............Nearly calm. Sky/Weather.........Mostly sunny. Max Temperature.....Mid 80s. Winds...............Northwest winds around 5 mph. Sunrise: 05:25 AM CDT Sunset: 08:40 PM CDT $$