SXUS43 KGRB 221901 RECGRB WIZ048-WIZ049-230900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 201 PM CDT Sat Aug 22 2026 .REST OF THE AFTERNOON...Northwest winds 10 to 15 knots. Slight chance of thunderstorms. Waves 1 to 3 feet. Near steady temperature in the mid 70s. .TONIGHT...North winds around 10 knots. Slight chance of thunderstorms in the evening. 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. .MONDAY...Northwest winds up to 5 knots. Sunny. Waves 1 foot or less. Highs in the mid 70s. $$