Anvil Lake, WI

As of 2026-10-12, Anvil Lake sits at 90.74 ft, which is about average for this time of year. Over the past 30 days the level has fallen 0.26 ft.

The most recent reading at Anvil Lake is 90.74 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 Anvil Lake in our records is 95.92 ft on 2021-04-15. The lowest is 89.28 ft on 2012-10-12. Our record covers about 16 years of readings.

Compared with every October in our records, the current level is higher than 40% of them, which we classify as about average 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. Anvil Lake has fallen 0.26 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

Anvil Lake is -0.86 ft compared with this date last year (90.74 ft today). The full-history chart above covers 16 years, with a record high of 95.92 ft and a record low of 89.28 ft.