Lake Bonham water level today
On Oct 28, 2026, Lake Bonham is at 562.15 ft, 74.5% full (2.85 ft below full pool). That is 8.1 points below normal for this date.
Source: Texas Water Development Board · storage 8,216 of 11,027 acre-ft · provisional data
Lake Bonham percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Lake Bonham 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, 2026. Black specks are cloud and shadow masks.
Records and key dates
- Record high
- 100.0%Apr 5, 1999
- Record low
- 61.6%Nov 19, 2011
- 12-month high
- 100.0%Jun 8, 2026
- 12-month low
- 71.1%Jan 22, 2026
- Last time full
- Jun 29, 2026
- Change in 1 year
- −0.22 ft−1.8 pts
About Lake Bonham
- River basin
- Red
- Full pool (top of conservation pool)
- 565.00 ft
- Conservation capacity
- 11,027 acre-ft
- Surface area today
- 912 acres
- Dead pool elevation
- 538.00 ft
- Flood control reservoir
- No
- Data since
- Mar 25, 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 | 72% | 75% | 77% | 80% | 82% | 99% | 97% | 88% | 80% | 77% | — | — |
| 2025 | 74% | 90% | 91% | 99% | 100% | 99% | 95% | 88% | 83% | 78% | 75% | 75% |
| 2024 | 95% | 100% | 99% | 100% | 100% | 99% | 92% | 86% | 79% | 74% | 71% | 71% |
| 2023 | 97% | 100% | 100% | 99% | 99% | 100% | 98% | 92% | 84% | 82% | 89% | 88% |
| 2022 | 74% | 72% | 75% | 90% | 99% | 98% | 90% | 83% | 82% | 78% | 95% | 100% |
| 2021 | 99% | 98% | 99% | 98% | 100% | 100% | 95% | 89% | 83% | 79% | 78% | 76% |
| 2020 | 93% | 100% | 100% | 100% | 99% | 98% | 92% | 90% | 100% | 98% | 94% | 92% |
| 2019 | 100% | 100% | 100% | 99% | 100% | 100% | 98% | 91% | 85% | 80% | 81% | 84% |
| 2018 | 91% | 92% | 99% | 99% | 99% | 95% | 88% | 83% | 86% | 100% | 99% | 100% |
| 2017 | 74% | 74% | 73% | 74% | 75% | 73% | 80% | 96% | 95% | 90% | 88% | 87% |
Frequently asked questions
Is Lake Bonham full?
Not quite. On Oct 28, 2026 Lake Bonham was 74.5% full, 2.85 feet below its full pool elevation of 565.00 ft. It was last full on Jun 29, 2026.
What is the normal level of Lake Bonham for this time of year?
Between 1996 and 2025, Lake Bonham averaged 82.6% full around Oct 28, and 8 in 10 years it was between 73.3% and 100.0%. Today it is −8.1 percentage points below that average.
What is the lowest Lake Bonham has been?
In the TWDB record, which starts in 1999, the lowest daily value was 61.6% on Nov 19, 2011. The highest was 100.0% on Apr 5, 1999.
How often is the Lake Bonham 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 (11,027 acre-feet for Lake Bonham). Water above the conservation pool is flood storage and is not counted, so a reservoir can show 100% while rising into its flood pool.