SXUS43 KGRB 210846 RECGRB WIZ048-WIZ049-212100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 346 AM CDT Tue Apr 21 2026 .EARLY THIS MORNING...South winds 10 to 15 knots. Mostly clear. Waves less than 1 foot. Near steady temperature in the mid 40s. .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. $$