Lake Travis Water Level Today - 677.39 ft, 93.9% Full
Mansfield Dam · Colorado River (Texas) · Texas - updated daily from official gauges
Western Reservoir Conditions·Daily·No. 47··Latest reading
- Lake Travis is 93.9% full - high on this site's capacity scale - as of . Surface elevation 677.39 feet, storage 1,030,807 acre-feet (capacity basis 1,098,044 acre-feet), per Texas Water Development Board data.
- That elevation is its highest September reading since 2016, and 63.21 feet above its record low of 614.18 ft (, the lowest since the reservoir first filled), in a daily record going back to September 30, 1940 (TWDB's period of record for this reservoir).
- Storage is 125% of the September 8 average across 84 years of record.
- Lake Travis is falling: elevation changed -0.99 ft over the past week, -3.15 ft over the past month, and +4.15 ft over the past year, per Texas Water Development Board data.
Lake Travis is holding near the top of its operating range at 93.9% of capacity, +4.15 ft over the past twelve months.
Lake Travis operating range
Lake Travis is operated within a narrow band rather than drawn down and refilled over years. As of it sits 3.61 feet below its 681.0 ft full-pool reference. Over the past two years the daily record ranges from 635.30 ft () to 684.71 ft () - a band of 49.41 feet. The highest reading in the full record is 710.31 ft on .
Storage above the full-pool reference is flood control space, not supply. A reservoir reading at or near 100% of its conservation capacity is being operated normally - it is not a surplus, and the operator may release water to hold that space.
Lake Travis storage in context
| Reading | Elevation (ft) | Storage (AF) | % full |
|---|---|---|---|
| Today (September 8, 2026) | 677.39 | 1,030,807 | 93.9% |
| One year ago | 673.24 | 957,242 | 87.2% |
| Five years ago | 664.47 | 815,476 | 74.3% |
| Record low (August 14, 1951) | 614.18 | 288,562 | 26.3% |
| Capacity basis | 681.00 | 1,098,044 | 100.0% |
Lake Travis water level, past 12 months
93.9% full at the latest reading - across the past 12 months it ranged from 72.6% (April 19, 2026) to 100.0% (August 2, 2026). Percent full is storage against the 1,098,044-acre-foot capacity basis, not a share of the elevation plotted above.
Lake Travis elevation, full record
93.9% full at the latest reading - across the storage record since September 30, 1940 it ranged from 1.7% (October 31, 1940) to 101.4% (July 5, 2019). Percent full is storage against the 1,098,044-acre-foot capacity basis, not a share of the elevation plotted above. Every percentage here is measured against today's capacity basis; a reservoir's surveyed capacity changes as sediment accumulates behind the dam, so early-record percentages are indicative rather than exact.
Last 14 daily readings
| Date | Elevation (ft) | Day change | Storage (AF) |
|---|---|---|---|
| September 8, 2026 | 677.39 | -0.10 ft | 1,030,807 |
| September 7, 2026 | 677.49 | -0.14 ft | 1,032,630 |
| September 6, 2026 | 677.63 | -0.15 ft | 1,035,186 |
| September 5, 2026 | 677.78 | -0.15 ft | 1,037,929 |
| September 4, 2026 | 677.93 | -0.15 ft | 1,040,677 |
| September 3, 2026 | 678.08 | -0.16 ft | 1,043,430 |
| September 2, 2026 | 678.24 | -0.14 ft | 1,046,373 |
| September 1, 2026 | 678.38 | -0.13 ft | 1,048,952 |
| August 31, 2026 | 678.51 | -0.15 ft | 1,051,351 |
| August 30, 2026 | 678.66 | -0.12 ft | 1,054,124 |
| August 29, 2026 | 678.78 | -0.11 ft | 1,056,346 |
| August 28, 2026 | 678.89 | -0.10 ft | 1,058,386 |
| August 27, 2026 | 678.99 | -0.10 ft | 1,060,242 |
| August 26, 2026 | 679.09 | - | 1,062,101 |
Frequently asked questions
What is the water level of Lake Travis today?
As of September 8, 2026, Lake Travis's surface elevation is 677.39 feet, with 1,030,807 acre-feet in storage - 93.9% of the 1,098,044 acre-foot capacity basis. Source: Water Data for Texas (TWDB) daily data.
How full is Lake Travis?
Lake Travis is 93.9% full as of September 8, 2026. Its storage is 125% of the September 8 average across its record since 1940. Source: Water Data for Texas (TWDB) daily data.
When was Lake Travis last full?
Lake Travis was last at or above 95% of its 1,098,044 acre-foot capacity basis on September 3, 2026. As of September 8, 2026 it is 93.9% full. Source: Water Data for Texas (TWDB) daily data.
Is Lake Travis rising or falling?
Lake Travis is falling: its elevation changed -0.99 feet over the week ending September 8, 2026, -3.15 ft over the past month, and +4.15 feet over the past year. Source: Water Data for Texas (TWDB) daily data.
What was Lake Travis's lowest water level on record?
Lake Travis's lowest surface elevation since it first filled (its first near-full reading in this series is from 1942) was 614.18 feet on August 14, 1951, per the daily record used by this site. As of September 8, 2026 the reservoir is 63.21 feet above that record low.
About this gauge
Lake Travis, behind Mansfield Dam northwest of Austin, is the largest of the Highland Lakes operated by the Lower Colorado River Authority on the Texas Colorado River, and the region's main flood-control and water-supply reservoir.
- Operator
- Texas Water Development Board (Water Data for Texas)
- Station
- travis
- Measurements
- Daily water level and conservation storage
- Dam
- Mansfield Dam
- River
- Colorado River (Texas)
- State
- Texas
- Coordinates
- 30.3910, -97.9066 (USGS NWIS site 08154500 (NAD83))
- Full pool reference
- 681.0 ft
- Capacity basis
- 1,098,044 acre-feet (Water Data for Texas (TWDB) conservation capacity)
- Period of record
- September 30, 1940 (TWDB's period of record for this reservoir)
- Status
- Provisional - subject to revision by the reporting agency
- Update cadence
- Daily
TWDB reports conservation storage against a conservation capacity that is restated as new volumetric surveys are completed, so a percent-full figure here can change without the water level changing. TWDB's methodology page is linked in the notes below.
Download the daily CSV (date, elevation ft, storage AF) or see all data downloads.
Other reservoirs tracked
Texas & Rio Grande: Lake Buchanan, Canyon Lake, Amistad Reservoir, Falcon Lake, Elephant Butte Reservoir.
Also: Lake Mead, Lake Powell, Lake Mohave, Lake Havasu, Flaming Gorge Reservoir, Blue Mesa Reservoir, Navajo Reservoir, Shasta Lake, Lake Oroville, Folsom Lake, Lake Berryessa, New Melones Lake, Trinity Lake, Don Pedro Reservoir, San Luis Reservoir.
Notes
- 1/Percent full is storage divided by the 1,098,044 acre-foot capacity basis published in the Water Data for Texas (TWDB) conservation capacity. ↩
- 2/Water level and conservation storage are from the Texas Water Development Board's daily record for Lake Travis. TWDB recomputes conservation capacity as survey data are updated, so percent-full may be restated. ↩
- 3/Gauge coordinates 30.3910, -97.9066 - USGS NWIS site 08154500 (NAD83). Elevations are as published by the operating agency; consult the source for the vertical datum in use. ↩
- 4/Period of record for the daily series used here begins September 30, 1940 (TWDB's period of record for this reservoir). Record low is measured over that window only. ↩
- 5/All readings carry the date the gauge reported them, which may lag today's date. This site publishes observations, not forecasts. ↩