SXUS43 KGRB 200621 RECGRB WIZ048-WIZ049-200900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 121 AM CDT Wed May 20 2026 .REST OF THE NIGHT...Northwest winds 10 to 15 knots. Mostly 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 upper 50s. .WEDNESDAY NIGHT...East winds 5 to 15 knots. Mostly cloudy in the evening then becoming partly cloudy. Waves 1 foot or less. Lows in the lower 40s. .THURSDAY...East winds 5 to 10 knots. Partly sunny. Waves 1 foot or less. Highs in the mid 50s. $$