SXUS43 KGRB 180856 RECGRB WIZ048-WIZ049-182100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 356 AM CDT Mon May 18 2026 .EARLY THIS MORNING...South winds 15 to 20 knots. Patchy fog. chance of thunderstorms. Waves 1 foot or less. Near steady temperature around 60. .TODAY...Southwest winds 10 to 20 knots. Chance of thunderstorms in the morning, then slight chance of thunderstorms in the afternoon. Waves 1 foot or less. Highs in the mid 70s. .TONIGHT...South winds 10 to 20 knots. Slight chance of thunderstorms in the evening, then chance of thunderstorms after midnight. Waves 1 foot or less. Lows in the lower 60s. .TUESDAY...West winds 15 to 20 knots. Chance of thunderstorms in the morning. Waves 1 to 3 feet. Highs in the mid 60s. .TUESDAY NIGHT...Northwest winds 10 to 20 knots. Partly cloudy. Waves 1 foot or less. Lows in the mid 40s. $$