SXUS43 KGRB 221441 RECGRB WIZ048-WIZ049-222100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 941 AM CDT Sat Aug 22 2026 .TODAY...Northwest winds around 10 knots. Chance of thunderstorms in the afternoon. Waves 1 to 2 feet. Highs in the mid 70s. .TONIGHT...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. .SUNDAY NIGHT...North winds 5 to 10 knots. Mostly clear. Waves 1 foot or less. Lows in the mid 50s. $$