Lake Granbury water level today
On Oct 28, 2026, Lake Granbury is at 690.64 ft, 87.9% full (2.06 ft below full pool). That is 3.9 points below normal for this date.
Source: Texas Water Development Board · storage 116,889 of 132,949 acre-ft · provisional data
Lake Granbury percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Lake Granbury 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 2025. Black specks are cloud and shadow masks.
Records and key dates
- Record high
- 100.0%Jan 1, 1988
- Record low
- 50.9%Jun 21, 2014
- 12-month high
- 100.0%Jun 7, 2026
- 12-month low
- 83.9%Sep 30, 2026
- Last time full
- Jun 7, 2026
- Change in 1 year
- −1.28 ft−7.4 pts
About Lake Granbury
- River basin
- Brazos
- Full pool (top of conservation pool)
- 692.70 ft
- Conservation capacity
- 132,949 acre-ft
- Surface area today
- 7,421 acres
- Dead pool elevation
- 640.00 ft
- Flood control reservoir
- No
- Data since
- Oct 2, 1987
Monthly average, last 10 years
Average percent full each month.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 97% | 98% | 99% | 99% | 99% | 99% | 96% | 91% | 87% | 88% | — | — |
| 2025 | 99% | 100% | 99% | 98% | 98% | 99% | 99% | 99% | 97% | 94% | 95% | 99% |
| 2024 | 99% | 99% | 99% | 99% | 99% | 99% | 99% | 96% | 98% | 94% | 97% | 99% |
| 2023 | 87% | 90% | 92% | 90% | 90% | 92% | 98% | 95% | 92% | 92% | 99% | 97% |
| 2022 | 96% | 98% | 99% | 98% | 98% | 95% | 91% | 88% | 89% | 85% | 86% | 88% |
| 2021 | 100% | 100% | 100% | 100% | 99% | 98% | 99% | 99% | 98% | 100% | 98% | 97% |
| 2020 | 100% | 100% | 99% | 100% | 99% | 99% | 99% | 96% | 99% | 100% | 99% | 99% |
| 2019 | 99% | 100% | 100% | 99% | 98% | 98% | 100% | 99% | 98% | 95% | 97% | 99% |
| 2018 | 98% | 98% | 100% | 99% | 97% | 95% | 92% | 90% | 94% | 96% | 99% | 99% |
| 2017 | 100% | 100% | 100% | 99% | 98% | 99% | 100% | 100% | 97% | 99% | 98% | 97% |
Frequently asked questions
Is Lake Granbury full?
Not quite. On Oct 28, 2026 Lake Granbury was 87.9% full, 2.06 feet below its full pool elevation of 692.70 ft. It was last full on Jun 7, 2026.
What is the normal level of Lake Granbury for this time of year?
Between 1996 and 2025, Lake Granbury averaged 91.8% full around Oct 28, and 8 in 10 years it was between 79.2% and 99.5%. Today it is −3.9 percentage points below that average.
What is the lowest Lake Granbury has been?
In the TWDB record, which starts in 1987, the lowest daily value was 50.9% on Jun 21, 2014. The highest was 100.0% on Jan 1, 1988.
How often is the Lake Granbury 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 (132,949 acre-feet for Lake Granbury). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.