SXUS43 KGRB 190012 RECGRB WIZ048-WIZ049-190115- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 711 PM CDT Mon May 18 2026 .TONIGHT...South winds 10 to 15 knots. Slight chance of thunderstorms in the evening, then chance of thunderstorms after midnight. Waves 1 foot or less. Lows in the lower 60s. .TUESDAY...West winds around 15 knots. Chance of rain showers in the morning, then slight chance of rain showers in the afternoon. Waves 1 foot or less. Highs in the mid 60s. .TUESDAY NIGHT...Northwest winds 10 to 15 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 foot or less. Lows in the mid 40s. .WEDNESDAY...North winds 5 to 15 knots. Mostly sunny. Waves 1 foot or less. Highs in the mid 50s. $$