Diamond Lake Water Level
Oregon · updated daily from the U.S. Geological Survey
5183.98 ft
Diamond Lake is current reading available and steady (-0.02 ft in the last 7 days).
Change since yesterday: +0.01 ft
Reading as of 2026-08-15
Where Diamond Lake sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
+0.01 ft
7-day change
-0.02 ft
30-day change
-0.09 ft
1-year change
— ft
Last 30 days
Last 12 months
Diamond Lake records and averages
| Current level | 5183.98 ft |
|---|---|
| Record high | 5184.09 ft (2026-06-27) |
| Record low | 5183.34 ft (2026-04-19) |
| Average of all readings | 5183.87 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Diamond Lake full right now?
As of 2026-08-15, Diamond Lake sits at 5183.98 ft, which is current reading available.Over the past 30 days the level has fallen 0.09 ft.
What is the water level at Diamond Lake today?
The most recent reading is 5183.98 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 Diamond Lake has ever been?
The highest level in our records is 5184.09 ft on 2026-06-27. The lowest is 5183.34 ft on 2026-04-19. Our record covers about 0.3 years of readings.
Why is Diamond 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. Diamond Lake has fallen 0.09 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Diamond 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 5184.09 ft and a record low of 5183.34 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.