SXUS43 KGRB 182316 RECGRB WIZ048-WIZ049-190900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 616 PM CDT Mon May 18 2026 .TONIGHT...South winds 5 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. $$