Potholes Reservoir, WA

As of 2026-09-30, Potholes Reservoir sits at 1028.99 ft, which is high for this time of year. Over the past 30 days the level has risen 0.32 ft.

The most recent reading at Potholes Reservoir is 1028.99 ft (2026-09-30), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.

The highest level for Potholes Reservoir in our records is 1046.62 ft on 2026-05-17. The lowest is 1025.85 ft on 2025-09-03. Our record covers about 4 years of readings.

Compared with every September in our records, the current level is higher than 92% 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. Potholes Reservoir has risen 0.32 ft over the past 30 days. For the operational reason on any given week, check the U.S. Bureau of Reclamation directly.

Potholes Reservoir is +0.38 ft compared with this date last year (1028.99 ft today). The full-history chart above covers 4 years, with a record high of 1046.62 ft and a record low of 1025.85 ft.