Osoyoos Lake, WA

As of 2026-10-12, Osoyoos Lake sits at 910.86 ft, which is below average for this time of year. Over the past 30 days the level has fallen 0.40 ft.

The most recent reading at Osoyoos Lake is 910.86 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 Osoyoos Lake in our records is 917.06 ft on 1972-06-03. The lowest is 909.07 ft on 2026-02-10. Our record covers about 61 years of readings.

Compared with every October in our records, the current level is higher than 20% of them, which we classify as 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. Osoyoos Lake has fallen 0.40 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

Osoyoos Lake is +0.28 ft compared with this date last year (910.86 ft today). The full-history chart above covers 61 years, with a record high of 917.06 ft and a record low of 909.07 ft.