Stillhouse Hollow Lake Water Level
Texas · updated daily from the Texas Water Development Board
99.9% full
Stillhouse Hollow Lake is near full at 621.95 ft and falling (-0.19 ft in the last 7 days).
At full pool (622.00 ft) · change since yesterday -0.02 ft
Reading as of 2026-08-15 · higher than 63% of August readings on record
Where Stillhouse Hollow Lake sits historically
Today's level compared with every reading in our 37.9-year record for this lake.
Since yesterday
-0.02 ft
7-day change
-0.19 ft
30-day change
-1.45 ft
1-year change
-1.08 ft
Full pool
622.0 ft
Last 30 days
Last 12 months
Full history (37.9 years)
Stillhouse Hollow Lake records and averages
| Current level | 621.95 ft |
|---|---|
| Percent full | 99.9% |
| Storage | 229,560 acre-feet |
| Record high | 663.99 ft (2007-07-17) |
| Record low | 600.0 ft (1999-09-08) |
| Average of all readings | 620.35 ft |
| Data span | 37.9 years (13,240 readings) |
Frequently asked questions
Is Stillhouse Hollow Lake full right now?
Stillhouse Hollow Lake is at 99.9% of conservation capacity as of 2026-08-15, which we classify as near full.Over the past 30 days the level has fallen 1.45 ft.
What is the water level at Stillhouse Hollow Lake today?
The most recent reading is 621.95 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 Stillhouse Hollow Lake has ever been?
The highest level in our records is 663.99 ft on 2007-07-17. The lowest is 600.0 ft on 1999-09-08. Our record covers about 37.9 years of readings.
Is Stillhouse Hollow Lake low for this time of year?
Compared with every August in our records, the current level is higher than 63% 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 Stillhouse Hollow 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. Stillhouse Hollow Lake has fallen 1.45 ft over the past 30 days. For the operational reason on any given week, check the Texas Water Development Board directly.
How much has Stillhouse Hollow Lake changed over the past year?
The level is -1.08 ft compared with this date last year (621.95 ft today). The full-history chart above covers 37.9 years, with a record high of 663.99 ft and a record low of 600.0 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.