RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 1040 CDT Sun Jul 19 2026 ...Lake Mendota... .TODAY... Waves...............Nearly calm. Sky/Weather.........Mostly sunny. Areas of smoke until 11 AM, then patchy smoke. Max Temperature.....Around 84. Winds...............Southeast winds up to 5 mph. Water Temperature...71 degrees. UV Index............7 - High. .TONIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly clear. Patchy smoke. Min Temperature.....Around 63. Winds...............South winds up to 5 mph. Water Temperature...71 degrees. UV Index............7 - High. .MONDAY... Waves...............1 to 1.5 feet. Sky/Weather.........Mostly cloudy then becoming mostly sunny. Areas of smoke in the morning. Patchy smoke in the afternoon. Showers likely and chance of thunderstorms through the day. Max Temperature.....Mid 80s. Winds...............Southwest winds 10 to 15 mph. .TUESDAY... Waves...............1.5 to 2 feet. Sky/Weather.........Sunny. Max Temperature.....Lower 80s. Winds...............Northwest winds around 15 mph. .WEDNESDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Sunny. Max Temperature.....Upper 70s. Winds...............North winds around 5 mph. Sunrise: 05:36 AM CDT Sunset: 08:32 PM CDT $$