SXUS43 KGRB 190320 RECGRB WIZ048-WIZ049-190430- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 1020 PM CDT Mon Aug 18 2025 .TONIGHT...Northeast winds 5 to 10 knots backing northwest after midnight. Patchy fog late in the evening, then areas of fog after midnight. Waves 1 foot or less. Near steady temperature in the mid 60s. .TUESDAY...North winds 5 to 10 knots. Patchy fog in the morning. Waves less than 1 foot. Highs in the upper 70s. .TUESDAY NIGHT...Northeast winds 5 to 10 knots. Slight chance of showers in the evening. patchy fog after midnight. Waves less than 1 foot. Lows in the mid 60s. .WEDNESDAY...Northeast winds around 10 knots. Mostly sunny. Waves 1 foot or less. Highs in the lower 70s. $$