SXUS43 KGRB 200340 RECGRB WIZ048-WIZ049-200445- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 1040 PM CDT Tue Aug 19 2025 .TONIGHT...East winds 5 to 10 knots. Slight chance of showers late in the evening, then slight chance of sprinkles after midnight. patchy fog after midnight. Waves less than 1 foot. Lows in the mid 60s. .WEDNESDAY...Northeast winds 5 to 10 knots. Patchy fog in the morning. slight chance of sprinkles in the morning, then slight chance of showers in the afternoon. Waves 1 foot or less. Highs in the mid 70s. .WEDNESDAY NIGHT...Northeast winds 5 to 10 knots. Mostly clear. Waves 1 foot or less. Lows in the mid 60s. .THURSDAY...Northeast winds 5 to 10 knots. Sunny. Waves less than 1 foot. Highs in the mid 70s. $$