SXUS43 KGRB 181953 RECGRB WIZ048-WIZ049-190900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 253 PM CDT Mon May 18 2026 .REST OF THE AFTERNOON...Southwest winds 5 to 10 knots. Slight chance of thunderstorms. Waves 1 foot or less. Highs in the upper 70s. .TONIGHT...South winds 5 to 15 knots. Chance of thunderstorms through the night. Showers likely after midnight. Waves 1 foot or less. Near steady temperature in the upper 60s. .TUESDAY...West winds 15 to 20 knots. Chance of thunderstorms 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. $$