RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 940 CST Fri Nov 21 2025 ...Lake Mendota... .TODAY... Waves...............Half foot or less. Sky/Weather.........Partly sunny. Max Temperature.....Around 46. Winds...............Northwest winds around 5 mph. Water Temperature...39 degrees. UV Index............1 - Low. .TONIGHT... Waves...............Half foot or less. Sky/Weather.........Mostly clear. Min Temperature.....Around 26. Winds...............Northwest winds up to 5 mph. Water Temperature...39 degrees. UV Index............1 - Low. .SATURDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly sunny. Max Temperature.....Around 50. Winds...............Southwest winds 5 to 10 mph. .SUNDAY... Waves...............Half foot or less. Sky/Weather.........Sunny. Max Temperature.....Mid 50s. Winds...............West winds around 5 mph. .MONDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly cloudy. Rain. Max Temperature.....Mid 50s. Winds...............South winds 5 to 10 mph. Sunrise: 07:57 AM CDT Sunset: 05:30 PM CDT $$