Big Cliff Lake Water Level
Oregon · updated daily from the U.S. Geological Survey
1194.06 ft
Big Cliff Lake is current reading available and steady (+0.12 ft in the last 7 days).
Change since yesterday: +0.20 ft
Reading as of 2026-08-15
Where Big Cliff Lake sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
+0.20 ft
7-day change
+0.12 ft
30-day change
-2.14 ft
1-year change
— ft
Last 30 days
Last 12 months
Big Cliff Lake records and averages
| Current level | 1194.06 ft |
|---|---|
| Record high | 1200.5 ft (2026-07-02) |
| Record low | 1193.42 ft (2026-06-05) |
| Average of all readings | 1196.34 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Big Cliff Lake full right now?
As of 2026-08-15, Big Cliff Lake sits at 1194.06 ft, which is current reading available.Over the past 30 days the level has fallen 2.14 ft.
What is the water level at Big Cliff Lake today?
The most recent reading is 1194.06 ft (2026-08-15), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Big Cliff Lake has ever been?
The highest level in our records is 1200.5 ft on 2026-07-02. The lowest is 1193.42 ft on 2026-06-05. Our record covers about 0.3 years of readings.
Why is Big Cliff Lake changing right now?
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. Big Cliff Lake has fallen 2.14 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Big Cliff Lake changed over the past year?
Year-over-year comparison is not available for this lake yet. The full-history chart above covers 0.3 years, with a record high of 1200.5 ft and a record low of 1193.42 ft.
Nearby lakes in Oregon
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Oregon lake levels.