Lake Austin: 95.2% full as of 2026-07-28
Historical Data
| Date | Percent Full |
Mean Water Level (ft) |
Reservoir Storage (acre-ft) |
Conservation Storage (acre-ft) |
Conservation Capacity (acre-ft) |
Surface Area (acres) |
|
|---|---|---|---|---|---|---|---|
| Today | 2026-07-28 | 95.2 | 492.06 | 23,427 | 22,818 | 23,972 | 1,538 |
| Yesterday | 2026-07-27 | 95.6 | 492.13 | 23,535 | 22,926 | 23,972 | 1,541 |
| 2 days ago | 2026-07-26 | 96.9 | 492.32 | 23,829 | 23,220 | 23,972 | 1,552 |
| 1 week ago | 2026-07-21 | 97.1 | 492.35 | 23,876 | 23,267 | 23,972 | 1,554 |
| 1 month ago | 2026-06-28 | 96.6 | 492.28 | 23,767 | 23,158 | 23,972 | 1,550 |
| 3 months ago | 2026-04-28 | 96.0 | 492.18 | 23,612 | 23,003 | 23,972 | 1,544 |
| 6 months ago | 2026-01-28 | 97.0 | 492.34 | 23,860 | 23,251 | 23,972 | 1,553 |
| 1 year ago | 2025-07-28 | 96.2 | 492.22 | 23,674 | 23,065 | 23,972 | 1,546 |
*
Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.
**
Values above, including today's are averaged conditions. For near real-time instantaneous water level, see table below or the interactive map viewer.
Most Recent Instantaneous Water Level
| Date/time |
Water Level (ft) |
Conservation Pool Elevation (ft) |
Height Above Conservation Pool (ft) |
|
|---|---|---|---|---|
| Most recent | 2026-07-28 16:00 | 491.94 | 492.80 | -0.86 |
| 1 hour prior | 2026-07-28 15:00 | 491.95 | 492.80 | -0.85 |
| 2 hours prior | 2026-07-28 14:00 | 491.96 | 492.80 | -0.84 |
| 6 hours prior | 2026-07-28 10:00 | 492.00 | 492.80 | -0.80 |
| 12 hours prior | 2026-07-28 04:00 | 492.06 | 492.80 | -0.74 |
| 24 hours prior | 2026-07-27 16:00 | 492.09 | 492.80 | -0.71 |
| 48 hours prior | 2026-07-26 16:00 | 492.44 | 492.80 | -0.36 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1939-01-01 |
| Vertical datum | NGVD29 -0.04 |
| Dead pool elevation | 462.00 ft above NGVD29 -0.04 |
| Service spillway crest elevation | 480.00 ft above NGVD29 |
| Top of gate elevation | 498.00 ft above NGVD29 |
| Emergency spillway crest elevation | 492.80 ft above NGVD29 |
| Maximum design elevation | 512.00 ft above NGVD29 |
| Top of dam elevation | 519.00 ft above NGVD29 |
| Conservation pool elevation | 492.80 ft above NGVD29 -0.04 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
2008-12-01 (source: TWDB)
: GIS Data
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| Data Source | LCRA:3999 |
Lake Location
