Lake Winnebago, WI

As of 2026-10-12, Lake Winnebago sits at 2.87 ft, which is high for this time of year. Over the past 30 days the level has fallen 0.20 ft.

The most recent reading at Lake Winnebago is 2.87 ft (2026-10-12), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.

The highest level for Lake Winnebago in our records is 4.75 ft on 1922-04-23. The lowest is 0.10 ft on 1918-03-02. Our record covers about 126 years of readings.

Compared with every October in our records, the current level is higher than 84% of them, which we classify as high for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Lake Winnebago has fallen 0.20 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

Lake Winnebago is +0.04 ft compared with this date last year (2.87 ft today). The full-history chart above covers 126 years, with a record high of 4.75 ft and a record low of 0.10 ft.