RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 1530 CDT Tue Sep 30 2025 ...Sinissippi Lake... .TONIGHT... Waves...............Half foot or less. Sky/Weather.........Partly cloudy until 2 AM, then mostly cloudy until 5 AM, then partly cloudy. Min Temperature.....Around 56. Winds...............East winds 5 to 10 mph. Water Temperature...69 degrees. UV Index............5 - Moderate. .WEDNESDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly sunny. Max Temperature.....Around 75. Winds...............Southeast winds 5 to 10 mph. Water Temperature...69 degrees. UV Index............5 - Moderate. .WEDNESDAY NIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Partly cloudy. Min Temperature.....Mid 50s. Winds...............Southeast winds around 5 mph. .THURSDAY... Waves...............Half foot or less. Sky/Weather.........Sunny. Max Temperature.....Lower 80s. Winds...............South winds around 5 mph. .FRIDAY... Waves...............Half foot or less. Sky/Weather.........Sunny. Max Temperature.....Upper 80s. Winds...............Southwest winds around 5 mph. Sunrise: 06:50 AM CDT Sunset: 06:40 PM CDT $$