SXUS43 KGRB 022320 RECGRB WIZ048-WIZ049-030900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 620 PM CDT Wed Jul 2 2025 .TONIGHT...West winds 5 to 10 knots. Chance of thunderstorms in the evening. Waves less than 1 foot. Lows in the upper 60s. .THURSDAY...East winds around 5 knots. Slight chance of thunderstorms in the afternoon. Waves less than 1 foot. Highs in the upper 70s. .THURSDAY NIGHT...Southeast winds 5 to 10 knots. Slight chance of thunderstorms after midnight. Waves 1 foot or less. Lows in the upper 60s. .FRIDAY...South winds 5 to 10 knots. Mostly sunny. Waves less than 1 foot. Highs in the mid 80s. $$