Lewisville Lake water level today
On Oct 28, 2026, Lewisville Lake is at 517.90 ft, 81.3% full (4.10 ft below full pool). That is 0.9 points below normal for this date.
Lowest since October 2023Near normal
Source: Texas Water Development Board · storage 457,903 of 563,228 acre-ft · provisional data
Lewisville Lake percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Records and key dates
- Record high
- 100.0%May 20, 1989
- Record low
- 43.3%Oct 15, 2000
- 12-month high
- 100.0%Nov 25, 2025
- 12-month low
- 81.3%Oct 28, 2026
- Last time full
- Jul 20, 2026
- Change in 1 year
- −3.43 ft−15.5 pts
About Lewisville Lake
- River basin
- Trinity
- Full pool (top of conservation pool)
- 522.00 ft
- Conservation capacity
- 563,228 acre-ft
- Surface area today
- 24,287 acres
- Dead pool elevation
- 481.00 ft
- Flood control reservoir
- Yes
- Water supply for
- Dallas
- Data since
- Jan 6, 1988
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 98% | 99% | 100% | 100% | 100% | 100% | 99% | 93% | 85% | 83% | — | — |
| 2025 | 90% | 93% | 92% | 93% | 100% | 100% | 99% | 95% | 94% | 95% | 96% | 100% |
| 2024 | 94% | 99% | 100% | 100% | 100% | 100% | 100% | 99% | 95% | 90% | 86% | 86% |
| 2023 | 92% | 97% | 100% | 100% | 99% | 98% | 95% | 88% | 80% | 78% | 90% | 89% |
| 2022 | 91% | 91% | 92% | 98% | 100% | 100% | 96% | 87% | 83% | 78% | 82% | 89% |
| 2021 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 98% | 94% | 94% | 93% |
| 2020 | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 96% | 100% | 98% | 97% | 96% |
| 2019 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 95% | 92% | 96% | 100% |
| 2018 | 93% | 94% | 100% | 99% | 98% | 95% | 89% | 86% | 90% | 100% | 100% | 100% |
| 2017 | 100% | 100% | 100% | 100% | 99% | 100% | 100% | 99% | 99% | 96% | 92% | 91% |
Frequently asked questions
Is Lewisville Lake full?
Not quite. On Oct 28, 2026 Lewisville Lake was 81.3% full, 4.10 feet below its full pool elevation of 522.00 ft. It was last full on Jul 20, 2026.
What is the normal level of Lewisville Lake for this time of year?
Between 1996 and 2025, Lewisville Lake averaged 82.2% full around Oct 28, and 8 in 10 years it was between 57.7% and 100.0%. Today it is −0.9 percentage points below that average.
What is the lowest Lewisville Lake has been?
In the TWDB record, which starts in 1988, the lowest daily value was 43.3% on Oct 15, 2000. The highest was 100.0% on May 20, 1989.
How often is the Lewisville Lake 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 (563,228 acre-feet for Lewisville Lake). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.