SXUS43 KGRB 181521 RECGRB WIZ048-WIZ049-182100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 1021 AM CDT Sat Jul 18 2026 .TODAY...North winds around 10 knots. Patchy smoke in the afternoon. Waves 1 foot or less. Highs in the lower 80s. .TONIGHT...East winds 5 to 10 knots. Areas of smoke. Waves 1 foot or less. Lows in the lower 60s. .SUNDAY...East winds around 5 knots veering south up to 5 knots in the afternoon. Areas of smoke. Waves 1 foot or less. Highs in the upper 70s. .SUNDAY NIGHT...South winds 5 to 15 knots. Areas of smoke in the evening. Waves 1 to 2 feet. Lows in the mid 60s. $$