SXUS43 KGRB 190736 RECGRB WIZ048-WIZ049-190900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 236 AM CDT Tue May 19 2026 .REST OF THE NIGHT...South winds 15 to 20 knots. Chance of thunderstorms. Waves 1 foot or less. Lows in the lower 60s. .TUESDAY...West winds 15 to 20 knots. Chance of thunderstorms in the morning, then chance of sprinkles in the afternoon. Waves 1 foot or less. Highs in the upper 60s. .TUESDAY NIGHT...Northwest winds 10 to 15 knots. Chance of sprinkles in the evening. 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. $$