SXUS43 KGRB 221821 RECGRB WIZ048-WIZ049-222100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 121 PM CDT Sat Aug 22 2026 .THIS AFTERNOON...Northwest winds 10 to 15 knots. Mostly sunny. Waves 1 to 3 feet. Near steady temperature in the mid 70s. .TONIGHT...North winds around 10 knots. Mostly clear. Waves 1 to 2 feet. Lows in the mid 50s. .SUNDAY...Northwest winds around 10 knots. Mostly sunny. Waves 1 foot or less. Highs in the mid 70s. .SUNDAY NIGHT...North winds 5 to 10 knots. Mostly clear. Waves 1 foot or less. Lows in the mid 50s. $$