SXUS43 KGRB 190452 RECGRB WIZ048-WIZ049-190600- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 1152 PM CDT Mon May 18 2026 .TONIGHT...South winds 10 to 20 knots. Slight chance of thunderstorms late in the evening, then chance of thunderstorms after midnight. Waves 1 foot or less. Lows in the lower 60s. .TUESDAY...West winds 15 to 20 knots. Chance of thunderstorms in the morning. Waves 1 foot or less. Highs in the upper 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 upper 40s. .WEDNESDAY...North winds 5 to 10 knots. Mostly sunny. Waves 1 foot or less. Highs in the mid 50s. $$