SXUS43 KGRB 062301 RECGRB WIZ048-WIZ049-070900- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 601 PM CDT Wed May 6 2026 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM CDT THURSDAY... .TONIGHT...West winds 5 to 10 knots. Areas of frost after midnight. Waves 1 foot or less. Lows in the mid 30s. .THURSDAY...West winds 5 to 10 knots. Widespread frost in the morning. chance of rain showers through the day. Waves 1 foot or less. Highs in the lower 50s. .THURSDAY NIGHT...West winds 5 to 10 knots backing southwest after midnight. Slight chance of rain showers in the evening. Waves 1 foot or less. Lows in the mid 30s. .FRIDAY...West winds 5 to 10 knots. Mostly sunny. Waves less than 1 foot. Highs in the upper 50s. $$