Amistad Reservoir water level today
On Oct 28, 2026, Amistad Reservoir is at 1,062.93 ft, 46.7% full (54.07 ft below full pool). That is 18.7 points below normal for this date.
Fullest since February 2023Very low
Source: Texas Water Development Board · storage 847,573 of 1,813,408 acre-ft · provisional data
Amistad Reservoir percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Amistad Reservoir 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 2024. Black specks are cloud and shadow masks.
Records and key dates
- Record high
- 100.0%Jun 13, 1972
- Record low
- 0.1%Jun 1, 1968
- 12-month high
- 46.7%Oct 26, 2026
- 12-month low
- 29.2%Jun 14, 2026
- Last time full
- Apr 12, 2011
- Change in 1 year
- +5.19 ft+10.6 pts
About Amistad Reservoir
- River basin
- Rio Grande
- Full pool (top of conservation pool)
- 1,117.00 ft
- Conservation capacity
- 1,813,408 acre-ft
- Surface area today
- 24,245 acres
- Dead pool elevation
- 930.00 ft
- Flood control reservoir
- Yes
- Water supply for
- Brownsville, Laredo
- Data since
- Jun 1, 1968
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 35% | 33% | 32% | 31% | 30% | 29% | 33% | 38% | 39% | 45% | — | — |
| 2025 | 26% | 26% | 26% | 25% | 28% | 29% | 32% | 34% | 36% | 36% | 36% | 35% |
| 2024 | 26% | 25% | 28% | 28% | 28% | 25% | 24% | 25% | 27% | 27% | 27% | 27% |
| 2023 | 47% | 46% | 43% | 35% | 36% | 39% | 38% | 36% | 35% | 32% | 28% | 27% |
| 2022 | 49% | 48% | 48% | 44% | 40% | 37% | 34% | 32% | 41% | 45% | 46% | 47% |
| 2021 | 64% | 62% | 60% | 57% | 52% | 52% | 53% | 53% | 52% | 52% | 50% | 49% |
| 2020 | 75% | 72% | 68% | 67% | 61% | 58% | 58% | 57% | 59% | 63% | 65% | 64% |
| 2019 | 74% | 75% | 76% | 76% | 77% | 82% | 82% | 80% | 76% | 75% | 75% | 75% |
| 2018 | 76% | 75% | 75% | 74% | 72% | 70% | 66% | 60% | 59% | 64% | 70% | 73% |
| 2017 | 83% | 82% | 80% | 75% | 78% | 78% | 77% | 74% | 74% | 74% | 75% | 76% |
Frequently asked questions
Is Amistad Reservoir full?
Not quite. On Oct 28, 2026 Amistad Reservoir was 46.7% full, 54.07 feet below its full pool elevation of 1,117.00 ft. It was last full on Apr 12, 2011.
What is the normal level of Amistad Reservoir for this time of year?
Between 1996 and 2025, Amistad Reservoir averaged 65.4% full around Oct 28, and 8 in 10 years it was between 38.4% and 100.0%. Today it is −18.7 percentage points below that average.
What is the lowest Amistad Reservoir has been?
In the TWDB record, which starts in 1968, the lowest daily value was 0.1% on Jun 1, 1968. The highest was 100.0% on Jun 13, 1972.
How often is the Amistad Reservoir 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 (1,813,408 acre-feet for Amistad Reservoir). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.