Upper Klamath Lake Water Level
Oregon · updated daily from the U.S. Geological Survey
4141.85 ft
Upper Klamath Lake is about average for this time of year and falling (-0.22 ft in the last 7 days).
Change since yesterday: -0.04 ft
Reading as of 2026-08-14 · higher than 56% of August readings on record
Where Upper Klamath Lake sits historically
Today's level compared with every reading in our 9.9-year record for this lake.
Since yesterday
-0.04 ft
7-day change
-0.22 ft
30-day change
-0.89 ft
1-year change
-0.34 ft
Last 30 days
Last 12 months
Full history (9.9 years)
Upper Klamath Lake records and averages
| Current level | 4141.85 ft |
|---|---|
| Record high | 4145.28 ft (2019-05-05) |
| Record low | 4140.08 ft (2016-10-13) |
| Average of all readings | 4142.55 ft |
| Data span | 9.9 years (3,606 readings) |
Frequently asked questions
Is Upper Klamath Lake full right now?
As of 2026-08-14, Upper Klamath Lake sits at 4141.85 ft, which is about average for this time of year.Over the past 30 days the level has fallen 0.89 ft.
What is the water level at Upper Klamath Lake today?
The most recent reading is 4141.85 ft (2026-08-14), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Upper Klamath Lake has ever been?
The highest level in our records is 4145.28 ft on 2019-05-05. The lowest is 4140.08 ft on 2016-10-13. Our record covers about 9.9 years of readings.
Is Upper Klamath Lake low for this time of year?
Compared with every August in our records, the current level is higher than 56% of them — about 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.
Why is Upper Klamath Lake low 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. Upper Klamath Lake has fallen 0.89 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Upper Klamath Lake changed over the past year?
The level is -0.34 ft compared with this date last year (4141.85 ft today). The full-history chart above covers 9.9 years, with a record high of 4145.28 ft and a record low of 4140.08 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.