SXUS43 KGRB 220621 RECGRB WIZ048-WIZ049-220900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 121 AM CDT Sat Aug 22 2026 .REST OF THE NIGHT...Northwest winds 5 to 10 knots. Partly cloudy. Waves 1 to 3 feet. Lows in the lower 60s. .SATURDAY...Northwest winds 5 to 10 knots. Chance of showers and slight chance of thunderstorms in the afternoon. Waves 1 to 2 feet. Highs in the mid 70s. .SATURDAY NIGHT...North winds 5 to 10 knots. Slight chance of thunderstorms in the evening. Waves 1 to 2 feet. Lows in the upper 50s. .SUNDAY...Northwest winds around 10 knots. Sunny. Waves 1 foot or less. Highs in the mid 70s. $$