Lake Houston Water Level
Texas · updated daily from the Texas Water Development Board
100.0% full
Lake Houston is full at 42.39 ft and steady (+0.09 ft in the last 7 days).
At full pool (42.38 ft) · change since yesterday +0.01 ft
Reading as of 2026-08-15 · higher than 37% of August readings on record
Where Lake Houston sits historically
Today's level compared with every reading in our 30.1-year record for this lake.
Since yesterday
+0.01 ft
7-day change
+0.09 ft
30-day change
-0.80 ft
1-year change
-0.14 ft
Full pool
42.4 ft
Last 30 days
Last 12 months
Full history (30.1 years)
Lake Houston records and averages
| Current level | 42.39 ft |
|---|---|
| Percent full | 100.0% |
| Storage | 136,234 acre-feet |
| Record high | 52.28 ft (2017-08-29) |
| Record low | 36.34 ft (2011-09-05) |
| Average of all readings | 43.31 ft |
| Data span | 30.1 years (10,950 readings) |
Frequently asked questions
Is Lake Houston full right now?
Lake Houston is at 100.0% of conservation capacity as of 2026-08-15, which we classify as full.Over the past 30 days the level has fallen 0.80 ft.
What is the water level at Lake Houston today?
The most recent reading is 42.39 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 Houston has ever been?
The highest level in our records is 52.28 ft on 2017-08-29. The lowest is 36.34 ft on 2011-09-05. Our record covers about 30.1 years of readings.
Is Lake Houston low for this time of year?
Compared with every August in our records, the current level is higher than 37% of them — 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 Houston 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 Houston has fallen 0.80 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 Houston changed over the past year?
The level is -0.14 ft compared with this date last year (42.39 ft today). The full-history chart above covers 30.1 years, with a record high of 52.28 ft and a record low of 36.34 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.