Granger Lake water level today
On Oct 28, 2026, Granger Lake is at 503.85 ft, 98.8% full (0.15 ft below full pool). That is 5.6 points above normal for this date.
Source: Texas Water Development Board · storage 51,209 of 51,822 acre-ft · provisional data
Granger Lake percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Granger Lake 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 2026. Black specks are cloud and shadow masks.
Records and key dates
- Record high
- 100.0%Oct 2, 1995
- Record low
- 61.5%Nov 14, 2011
- 12-month high
- 100.0%Jan 28, 2026
- 12-month low
- 95.6%Jan 19, 2026
- Last time full
- Oct 15, 2026
- Change in 1 year
- +0.17 ft+1.3 pts
About Granger Lake
- River basin
- Brazos
- Full pool (top of conservation pool)
- 504.00 ft
- Conservation capacity
- 51,822 acre-ft
- Surface area today
- 4,074 acres
- Dead pool elevation
- 457.00 ft
- Flood control reservoir
- Yes
- Data since
- Oct 2, 1995
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% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 99% | — | — |
| 2025 | 93% | 98% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 97% | 97% | 96% |
| 2024 | 97% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 96% | 93% | 93% |
| 2023 | 97% | 100% | 100% | 100% | 100% | 100% | 96% | 87% | 78% | 76% | 81% | 85% |
| 2022 | 100% | 100% | 100% | 100% | 100% | 98% | 91% | 84% | 87% | 83% | 87% | 94% |
| 2021 | 95% | 98% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| 2020 | 100% | 100% | 100% | 100% | 100% | 100% | 98% | 93% | 91% | 90% | 88% | 88% |
| 2019 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 97% | 99% | 100% |
| 2018 | 100% | 100% | 100% | 100% | 100% | 100% | 98% | 92% | 96% | 100% | 100% | 100% |
| 2017 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
Frequently asked questions
Is Granger Lake full?
Not quite. On Oct 28, 2026 Granger Lake was 98.8% full, 0.15 feet below its full pool elevation of 504.00 ft. It was last full on Oct 15, 2026.
What is the normal level of Granger Lake for this time of year?
Between 1996 and 2025, Granger Lake averaged 93.2% full around Oct 28, and 8 in 10 years it was between 82.3% and 100.0%. Today it is +5.6 percentage points above that average.
What is the lowest Granger Lake has been?
In the TWDB record, which starts in 1995, the lowest daily value was 61.5% on Nov 14, 2011. The highest was 100.0% on Oct 2, 1995.
How often is the Granger 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 (51,822 acre-feet for Granger 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.