SXUS43 KGRB 041821 RECGRB WIZ048-WIZ049-042100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 121 PM CDT Tue Aug 4 2026 .THIS AFTERNOON...Southwest winds 10 to 15 knots. Chance of thunderstorms. Waves 1 foot or less. Near steady temperature in the upper 70s. .TONIGHT...West winds 5 to 10 knots. Chance of thunderstorms through the night. Showers likely after midnight. Waves 1 foot or less. Lows in the mid 60s. .WEDNESDAY...West winds around 5 knots. Chance of thunderstorms in the morning. Waves 1 foot or less. Highs in the upper 70s. .WEDNESDAY NIGHT...West winds up to 5 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 foot or less. Lows around 60. $$