SXUS43 KGRB 211446 RECGRB WIZ048-WIZ049-212100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 946 AM CDT Tue Apr 21 2026 .TODAY...Southwest winds 5 to 10 knots veering north in the afternoon. Sunny. Waves less than 1 foot. Highs in the lower 60s. .TONIGHT...East winds 5 to 10 knots. Mostly clear. Waves less than 1 foot. Lows in the lower 40s. .WEDNESDAY...Southeast winds 5 to 10 knots. Sunny. Waves less than 1 foot. Highs in the mid 60s. .WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Partly cloudy. Waves less than 1 foot. Lows around 50. $$