Lake Jacksonville water level today
On Oct 28, 2026, Lake Jacksonville is at 420.94 ft, 95.3% full (1.06 ft below full pool). That is 0.9 points above normal for this date.
Source: Texas Water Development Board · storage 24,457 of 25,670 acre-ft · provisional data
Lake Jacksonville percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Lake Jacksonville from space
The same area near the lowest and the highest level since 2016, on clear days. Compare the shoreline and the coves.
Imagery: NASA GIBS, Harmonized Landsat Sentinel-2 (HLS). Landsat 8/9 courtesy of NASA/USGS; contains modified Copernicus Sentinel data 2022, 2025. Black specks are cloud and shadow masks.
Records and key dates
- Record high
- 100.0%May 18, 1999
- Record low
- 76.5%Nov 18, 2011
- 12-month high
- 100.0%Oct 29, 2025
- 12-month low
- 95.1%Sep 1, 2026
- Last time full
- Jul 22, 2026
- Change in 1 year
- −1.21 ft−4.7 pts
About Lake Jacksonville
- River basin
- Neches
- Full pool (top of conservation pool)
- 422.00 ft
- Conservation capacity
- 25,670 acre-ft
- Surface area today
- 1,128 acres
- Dead pool elevation
- 372.00 ft
- Flood control reservoir
- No
- Data since
- May 14, 1999
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 97% | 97% | 96% | — | — |
| 2025 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| 2024 | 96% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 98% | 100% | 100% |
| 2023 | 97% | 100% | 100% | 100% | 100% | 100% | 98% | 94% | 91% | 91% | 92% | 92% |
| 2022 | 100% | 100% | 100% | 100% | 100% | 99% | 96% | 93% | 93% | 90% | 90% | 93% |
| 2021 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 98% | 98% | 100% |
| 2020 | 99% | 100% | 100% | 100% | 100% | 100% | 100% | 98% | 100% | 100% | 100% | 100% |
| 2019 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 96% | 95% | 96% | 97% |
| 2018 | 100% | 100% | 100% | 100% | 100% | 99% | 97% | 94% | 93% | 94% | 100% | 100% |
| 2017 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 98% | 98% | 99% |
Frequently asked questions
Is Lake Jacksonville full?
Not quite. On Oct 28, 2026 Lake Jacksonville was 95.3% full, 1.06 feet below its full pool elevation of 422.00 ft. It was last full on Jul 22, 2026.
What is the normal level of Lake Jacksonville for this time of year?
Between 1996 and 2025, Lake Jacksonville averaged 94.4% full around Oct 28, and 8 in 10 years it was between 86.8% and 100.0%. Today it is +0.9 percentage points above that average.
What is the lowest Lake Jacksonville has been?
In the TWDB record, which starts in 1999, the lowest daily value was 76.5% on Nov 18, 2011. The highest was 100.0% on May 18, 1999.
How often is the Lake Jacksonville 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 (25,670 acre-feet for Lake Jacksonville). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.