SXUS43 KGRB 191236 RECGRB WIZ048-WIZ049-192100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 736 AM CDT Tue May 19 2026 .TODAY...West winds 10 to 15 knots. Chance of rain showers in the morning, then chance of sprinkles in the afternoon. Waves 1 to 2 feet. Highs in the upper 60s. .TONIGHT...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. Sunny. Waves 1 foot or less. Highs in the upper 50s. .WEDNESDAY NIGHT...East winds 5 to 10 knots. Mostly cloudy. Waves 1 foot or less. Lows in the lower 40s. $$