Lake Sidney Lanier Water Level

As of 2026-08-14, Lake Sidney Lanier sits at 1066.42 ft, which is below average for this time of year.Over the past 30 days the level has risen 0.25 ft.

The most recent reading is 1066.42 ft (2026-08-14), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.

The highest level in our records is 1076.67 ft on 2020-02-20. The lowest is 1050.82 ft on 2007-12-27. Our record covers about 37.6 years of readings.

Compared with every August in our records, the current level is higher than 33% of them — below 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. Lake Sidney Lanier has risen 0.25 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

The level is -3.45 ft compared with this date last year (1066.42 ft today). The full-history chart above covers 37.6 years, with a record high of 1076.67 ft and a record low of 1050.82 ft.