SXUS43 KGRB 091056 RECGRB WIZ048-WIZ049-092100- Recreational Forecast for Lake Winnebago National Weather Service Green Bay WI 556 AM CDT Thu Jul 9 2026 .TODAY...South winds around 5 knots backing northeast in the afternoon. Chance of showers and slight chance of thunderstorms through the day. Waves less than 1 foot. Highs in the mid 70s. .TONIGHT...Northeast winds around 5 knots. Patchy fog in the evening. Waves less than 1 foot. Lows in the lower 60s. .FRIDAY...Northeast winds around 5 knots. Sunny. Waves 1 foot or less. Highs around 80. .FRIDAY NIGHT...East winds up to 5 knots. Mostly clear. Waves less than 1 foot. Lows in the lower 60s. $$