Lake Austin: 96.3% full as of 2026-10-07
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 | 2026-10-07 | 96.3 | 492.24 | 23,705 | 23,096 | 23,972 | 1,547 |
| Yesterday | 2026-10-06 | 96.1 | 492.20 | 23,643 | 23,034 | 23,972 | 1,545 |
| 2 days ago | 2026-10-05 | 96.6 | 492.28 | 23,767 | 23,158 | 23,972 | 1,550 |
| 1 week ago | 2026-09-30 | 96.3 | 492.24 | 23,705 | 23,096 | 23,972 | 1,547 |
| 1 month ago | 2026-09-07 | 97.9 | 492.48 | 24,078 | 23,469 | 23,972 | 1,562 |
| 3 months ago | 2026-07-07 | 95.4 | 492.10 | 23,489 | 22,880 | 23,972 | 1,540 |
| 6 months ago | 2026-04-07 | 98.3 | 492.54 | 24,172 | 23,563 | 23,972 | 1,565 |
| 1 year ago | 2025-10-07 | 95.9 | 492.17 | 23,597 | 22,988 | 23,972 | 1,544 |
*
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 | 2026-10-07 04:30 | 492.20 | 492.80 | -0.60 |
| 1 hour prior | 2026-10-07 03:30 | 492.21 | 492.80 | -0.59 |
| 2 hours prior | 2026-10-07 02:30 | 492.23 | 492.80 | -0.57 |
| 6 hours prior | 2026-10-06 22:30 | 492.30 | 492.80 | -0.50 |
| 12 hours prior | 2026-10-06 16:30 | 492.11 | 492.80 | -0.69 |
| 24 hours prior | 2026-10-06 04:30 | 492.28 | 492.80 | -0.52 |
| 48 hours prior | 2026-10-05 04:30 | 492.34 | 492.80 | -0.46 |
*
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
