Lake Nasworthy water level today
On Oct 28, 2026, Lake Nasworthy is at 1,871.75 ft, 85.9% full (0.96 ft below full pool). That is 2.4 points above normal for this date.
Source: Texas Water Development Board · storage 8,257 of 9,615 acre-ft · provisional data
Lake Nasworthy percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Records and key dates
- Record high
- 100.0%Nov 17, 2004
- Record low
- 45.5%May 6, 2014
- 12-month high
- 89.1%Nov 24, 2025
- 12-month low
- 84.7%Mar 16, 2026
- Last time full
- Feb 1, 2005
- Change in 1 year
- +0.07 ft+0.9 pts
About Lake Nasworthy
- River basin
- Colorado
- Full pool (top of conservation pool)
- 1,872.71 ft
- Conservation capacity
- 9,615 acre-ft
- Surface area today
- 1,236 acres
- Dead pool elevation
- 1,860.51 ft
- Flood control reservoir
- No
- Water supply for
- San Angelo
- Data since
- Oct 1, 1996
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 86% | 86% | 86% | 87% | 86% | 85% | 86% | 86% | 86% | 85% | — | — |
| 2025 | 86% | 86% | 86% | 85% | 87% | 86% | 86% | 85% | 85% | 85% | 86% | 86% |
| 2024 | 87% | 86% | 86% | 86% | 85% | 85% | 85% | 86% | 86% | 86% | 88% | 86% |
| 2023 | 86% | 86% | 85% | 85% | 84% | 85% | 84% | 85% | 85% | 86% | 86% | 86% |
| 2022 | 91% | 91% | 90% | 89% | 85% | 85% | 86% | 86% | 86% | 85% | 86% | 87% |
| 2021 | 87% | 86% | 85% | 83% | 85% | — | 84% | 87% | 85% | 84% | 84% | 89% |
| 2020 | 87% | 87% | 87% | 87% | 86% | 87% | 87% | 87% | 87% | 86% | 86% | 87% |
| 2019 | 90% | 89% | 89% | 89% | 89% | 88% | 87% | 87% | 88% | 86% | 86% | 87% |
| 2018 | 82% | 85% | 84% | 83% | 82% | 79% | 80% | 77% | 81% | 84% | 90% | 91% |
| 2017 | 80% | 79% | 80% | 78% | 84% | 83% | 82% | 79% | 82% | 82% | 83% | 83% |
Frequently asked questions
Is Lake Nasworthy full?
Not quite. On Oct 28, 2026 Lake Nasworthy was 85.9% full, 0.96 feet below its full pool elevation of 1,872.71 ft. It was last full on Feb 1, 2005.
What is the normal level of Lake Nasworthy for this time of year?
Between 1996 and 2025, Lake Nasworthy averaged 83.5% full around Oct 28, and 8 in 10 years it was between 76.8% and 89.0%. Today it is +2.4 percentage points above that average.
What is the lowest Lake Nasworthy has been?
In the TWDB record, which starts in 1996, the lowest daily value was 45.5% on May 6, 2014. The highest was 100.0% on Nov 17, 2004.
How often is the Lake Nasworthy water level updated?
TWDB publishes one reading per day for each reservoir. We check for new data every 2 hours and show the date of the reading next to the level. Recent values are provisional.
What does percent full mean?
It is the water stored in the conservation pool divided by the conservation capacity (9,615 acre-feet for Lake Nasworthy). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.