Lake Arlington water level today
On Oct 28, 2026, Lake Arlington is at 545.59 ft, 79.4% full (4.41 ft below full pool). That is 0.4 points above normal for this date.
Source: Texas Water Development Board · storage 31,894 of 40,157 acre-ft · provisional data
Lake Arlington percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Records and key dates
- Record high
- 100.0%May 6, 1989
- Record low
- 46.9%Aug 30, 1988
- 12-month high
- 100.0%Nov 21, 2025
- 12-month low
- 68.4%Sep 30, 2026
- Last time full
- Jun 11, 2026
- Change in 1 year
- −2.63 ft−12.2 pts
About Lake Arlington
- River basin
- Trinity
- Full pool (top of conservation pool)
- 550.00 ft
- Conservation capacity
- 40,157 acre-ft
- Surface area today
- 1,832 acres
- Dead pool elevation
- 505.00 ft
- Flood control reservoir
- No
- Water supply for
- Fort Worth
- Data since
- Jan 3, 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 | 93% | 93% | 96% | 95% | 95% | 97% | 89% | 78% | 71% | 82% | — | — |
| 2025 | 92% | 100% | 99% | 99% | 99% | 99% | 96% | 94% | 89% | 87% | 94% | 99% |
| 2024 | 100% | 100% | 100% | 100% | 100% | 98% | 93% | 82% | 76% | 68% | 65% | 76% |
| 2023 | 98% | 100% | 100% | 98% | 96% | 88% | 75% | 69% | 75% | 82% | 98% | 96% |
| 2022 | 75% | 79% | 84% | 94% | 92% | 93% | 83% | 84% | 94% | 80% | 98% | 100% |
| 2021 | 85% | 82% | 93% | 96% | 100% | 99% | 96% | 96% | 84% | 81% | 84% | 81% |
| 2020 | 96% | 100% | 100% | 95% | 96% | 96% | 96% | 83% | 84% | 80% | 80% | 81% |
| 2019 | 100% | 100% | 98% | 96% | 100% | 98% | 95% | 84% | 80% | 87% | 93% | 91% |
| 2018 | 87% | 93% | 100% | 98% | 95% | 92% | 87% | 76% | 90% | 100% | 100% | 100% |
| 2017 | 88% | 98% | 96% | 96% | 91% | 94% | 95% | 93% | 87% | 78% | 73% | 76% |
Frequently asked questions
Is Lake Arlington full?
Not quite. On Oct 28, 2026 Lake Arlington was 79.4% full, 4.41 feet below its full pool elevation of 550.00 ft. It was last full on Jun 11, 2026.
What is the normal level of Lake Arlington for this time of year?
Between 1996 and 2025, Lake Arlington averaged 79.0% full around Oct 28, and 8 in 10 years it was between 60.0% and 100.0%. Today it is +0.4 percentage points above that average.
What is the lowest Lake Arlington has been?
In the TWDB record, which starts in 1988, the lowest daily value was 46.9% on Aug 30, 1988. The highest was 100.0% on May 6, 1989.
How often is the Lake Arlington 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 (40,157 acre-feet for Lake Arlington). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.