RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 1530 CDT Sun Jul 6 2025 ...Lake Koshkonong... .TONIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Partly sunny until 11 PM, then partly cloudy. Chance of thunderstorms until 8 PM. Chance of showers after 5 PM. Patchy fog after 2 AM. Min Temperature.....Around 60. Winds...............Northeast winds 5 to 10 mph. Water Temperature...73 degrees. UV Index............9 - Very High. .MONDAY... Waves...............Half foot or less. Sky/Weather.........Mostly sunny. Max Temperature.....Around 82. Winds...............Northeast winds around 5 mph. Water Temperature...73 degrees. UV Index............9 - Very High. .MONDAY NIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Partly cloudy. Min Temperature.....Lower 60s. Winds...............Southeast winds around 5 mph. .TUESDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly cloudy. Chance of showers in the morning, then chance of thunderstorms in the afternoon. Max Temperature.....Lower 80s. Winds...............Southwest winds around 5 mph. .WEDNESDAY... Waves...............Nearly calm. Sky/Weather.........Mostly sunny. Slight chance of showers in the morning, then slight chance of thunderstorms in the afternoon. Max Temperature.....Lower 80s. Winds...............Northwest winds around 5 mph. Sunrise: 05:24 AM CDT Sunset: 08:37 PM CDT $$