Lake L. B. Johnson Water Level
Texas · updated daily from the Texas Water Development Board
98.7% full
Lake L. B. Johnson is near full at 824.77 ft and steady (+0.02 ft in the last 7 days).
0.23 ft below full pool of 825.00 ft · change since yesterday +0.03 ft
Reading as of 2026-08-15 · higher than 51% of August readings on record
Where Lake L. B. Johnson sits historically
Today's level compared with every reading in our 75.0-year record for this lake.
Since yesterday
+0.03 ft
7-day change
+0.02 ft
30-day change
+0.92 ft
1-year change
+0.01 ft
Full pool
825.0 ft
Last 30 days
Last 12 months
Full history (75.0 years)
Lake L. B. Johnson records and averages
| Current level | 824.77 ft |
|---|---|
| Percent full | 98.7% |
| Storage | 130,141 acre-feet |
| Record high | 828.0 ft (1952-09-11) |
| Record low | 793.8 ft (1970-11-16) |
| Average of all readings | 824.25 ft |
| Data span | 75.0 years (27,372 readings) |
Frequently asked questions
Is Lake L. B. Johnson full right now?
Lake L. B. Johnson is at 98.7% of conservation capacity as of 2026-08-15, which we classify as near full.Over the past 30 days the level has risen 0.92 ft.
What is the water level at Lake L. B. Johnson today?
The most recent reading is 824.77 ft (2026-08-15), sourced from the Texas Water Development Board. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Lake L. B. Johnson has ever been?
The highest level in our records is 828.0 ft on 1952-09-11. The lowest is 793.8 ft on 1970-11-16. Our record covers about 75.0 years of readings.
Is Lake L. B. Johnson low for this time of year?
Compared with every August in our records, the current level is higher than 51% of them — near full. 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 Lake L. B. Johnson 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. Lake L. B. Johnson has risen 0.92 ft over the past 30 days. For the operational reason on any given week, check the Texas Water Development Board directly.
How much has Lake L. B. Johnson changed over the past year?
The level is +0.01 ft compared with this date last year (824.77 ft today). The full-history chart above covers 75.0 years, with a record high of 828.0 ft and a record low of 793.8 ft.
Nearby lakes in Texas
Source: the Texas Water Development Board. Readings are provisional and subject to revision by the publishing agency. All Texas lake levels.