SXUS43 KGRB 201126 RECGRB WIZ048-WIZ049-202100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 626 AM CDT Mon Apr 20 2026 .TODAY...South winds 5 to 10 knots. Sunny. Waves less than 1 foot. Highs in the upper 40s. .TONIGHT...South winds around 10 knots. Partly cloudy. Waves less than 1 foot. Lows in the lower 40s. .TUESDAY...Southwest winds 5 to 10 knots veering northwest in the afternoon. Sunny. Waves less than 1 foot. Highs in the lower 60s. .TUESDAY NIGHT...Northeast winds around 5 knots. Mostly clear. Waves less than 1 foot. Lows in the upper 30s. $$