SXUS43 KGRB 191821 RECGRB WIZ048-WIZ049-192100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 121 PM CDT Tue May 19 2026 .THIS AFTERNOON...West winds around 15 knots. Partly sunny. Waves 1 foot or less. Near steady temperature in the lower 60s. .TONIGHT...Northwest winds 10 to 15 knots. Mostly cloudy. Waves 1 foot or less. Lows in the mid 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. $$