Lake Hefner Water Level
Oklahoma · updated daily from the U.S. Geological Survey
1193.41 ft
Lake Hefner is current reading available and falling (-0.74 ft in the last 7 days).
Change since yesterday: -0.09 ft
Reading as of 2026-08-15
Where Lake Hefner sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
-0.09 ft
7-day change
-0.74 ft
30-day change
-2.78 ft
1-year change
— ft
Last 30 days
Last 12 months
Lake Hefner records and averages
| Current level | 1193.41 ft |
|---|---|
| Record high | 1199.32 ft (2026-04-18) |
| Record low | 1193.41 ft (2026-08-15) |
| Average of all readings | 1197.03 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Lake Hefner full right now?
As of 2026-08-15, Lake Hefner sits at 1193.41 ft, which is current reading available.Over the past 30 days the level has fallen 2.78 ft.
What is the water level at Lake Hefner today?
The most recent reading is 1193.41 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 Lake Hefner has ever been?
The highest level in our records is 1199.32 ft on 2026-04-18. The lowest is 1193.41 ft on 2026-08-15. Our record covers about 0.3 years of readings.
Why is Lake Hefner 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. Lake Hefner has fallen 2.78 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Lake Hefner 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 1199.32 ft and a record low of 1193.41 ft.
Nearby lakes in Oklahoma
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Oklahoma lake levels.