RECMKX Recreational Boater Forecast for Inland Lakes for Southeast Wisconsin National Weather Service Milwaukee/Sullivan WI 1531 CDT Mon Apr 13 2026 ...Lake Beulah... .TONIGHT... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly cloudy until 8 PM, then partly cloudy. Chance of thunderstorms until 5 AM. Showers likely after 11 PM. Patchy fog after 2 AM. Min Temperature.....Around 61. Winds...............Southwest winds 10 to 15 mph. Water Temperature...55 degrees. UV Index............7 - High. .TUESDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly sunny. Showers after 5 PM. Max Temperature.....Around 79. Winds...............Southwest winds 10 to 15 mph. Water Temperature...55 degrees. UV Index............7 - High. .TUESDAY NIGHT... Waves...............Nearly calm. Sky/Weather.........Mostly cloudy. Chance of thunderstorms in the evening. Showers through the night. Min Temperature.....Mid 50s. Winds...............Southwest winds around 5 mph. .WEDNESDAY... Waves...............Nearly calm. Sky/Weather.........Cloudy. Showers through the day. Chance of thunderstorms in the afternoon. Max Temperature.....Upper 60s. Winds...............South winds 5 to 10 mph. .THURSDAY... Waves...............Half foot to 1 foot. Sky/Weather.........Mostly cloudy then becoming mostly sunny. Chance of showers. Max Temperature.....Lower 70s. Winds...............West winds around 10 mph. Sunrise: 06:15 AM CDT Sunset: 07:33 PM CDT $$