SXUS43 KGRB 230621 RECGRB WIZ048-WIZ049-230900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 121 AM CDT Thu Apr 23 2026 .REST OF THE NIGHT...Southeast winds 5 to 10 knots. Partly cloudy. Waves less than 1 foot. Near steady temperature around 50. .THURSDAY...South winds 10 to 20 knots. Mostly sunny. Waves less than 1 foot. Highs 67 to 72. .THURSDAY NIGHT...South winds 10 to 15 knots. Chance of thunderstorms through the night. Rain showers after midnight. patchy fog after midnight. Waves less than 1 foot. Lows in the mid 50s. .FRIDAY...Southwest winds around 10 knots veering west in the afternoon. Rain showers likely. Waves less than 1 foot. Highs in the lower 60s. $$