Pat Mayse Lake Water Level
Texas · updated daily from the Texas Water Development Board
97.8% full
Pat Mayse Lake is near full at 450.56 ft and falling (-0.25 ft in the last 7 days).
0.44 ft below full pool of 451.00 ft · change since yesterday -0.04 ft
Reading as of 2026-08-15 · higher than 54% of August readings on record
Where Pat Mayse Lake sits historically
Today's level compared with every reading in our 39.1-year record for this lake.
Since yesterday
-0.04 ft
7-day change
-0.25 ft
30-day change
-1.44 ft
1-year change
-0.38 ft
Full pool
451.0 ft
Last 30 days
Last 12 months
Full history (39.1 years)
Pat Mayse Lake records and averages
| Current level | 450.56 ft |
|---|---|
| Percent full | 97.8% |
| Storage | 115,374 acre-feet |
| Record high | 461.56 ft (2015-12-30) |
| Record low | 50.15 ft (1987-09-17) |
| Average of all readings | 445.65 ft |
| Data span | 39.1 years (13,400 readings) |
Frequently asked questions
Is Pat Mayse Lake full right now?
Pat Mayse Lake is at 97.8% of conservation capacity as of 2026-08-15, which we classify as near full.Over the past 30 days the level has fallen 1.44 ft.
What is the water level at Pat Mayse Lake today?
The most recent reading is 450.56 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 Pat Mayse Lake has ever been?
The highest level in our records is 461.56 ft on 2015-12-30. The lowest is 50.15 ft on 1987-09-17. Our record covers about 39.1 years of readings.
Is Pat Mayse Lake low for this time of year?
Compared with every August in our records, the current level is higher than 54% 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 Pat Mayse 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. Pat Mayse Lake has fallen 1.44 ft over the past 30 days. For the operational reason on any given week, check the Texas Water Development Board directly.
How much has Pat Mayse Lake changed over the past year?
The level is -0.38 ft compared with this date last year (450.56 ft today). The full-history chart above covers 39.1 years, with a record high of 461.56 ft and a record low of 50.15 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.