Somerville Lake water level today
On Oct 28, 2026, Somerville Lake is at 236.10 ft, 86.3% full (1.90 ft below full pool). That is 3.2 points below normal for this date.
Source: Texas Water Development Board · storage 129,715 of 150,293 acre-ft · provisional data
Somerville Lake percent full history
Percent full Normal range (10th–90th percentile, 1996–2025) Average
Somerville 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%Nov 3, 1995
- Record low
- 38.0%Nov 13, 2011
- 12-month high
- 100.0%May 27, 2026
- 12-month low
- 72.8%Apr 1, 2026
- Last time full
- Aug 13, 2026
- Change in 1 year
- +0.21 ft+1.4 pts
About Somerville Lake
- River basin
- Brazos
- Full pool (top of conservation pool)
- 238.00 ft
- Conservation capacity
- 150,293 acre-ft
- Surface area today
- 10,470 acres
- Dead pool elevation
- 206.00 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 | 79% | 79% | 77% | 75% | 91% | 100% | 100% | 99% | 92% | 89% | — | — |
| 2025 | 84% | 85% | 85% | 84% | 97% | 100% | 100% | 99% | 96% | 87% | 82% | 80% |
| 2024 | 68% | 99% | 100% | 100% | 100% | 100% | 100% | 100% | 98% | 88% | 85% | 84% |
| 2023 | 70% | 81% | 82% | 95% | 100% | 100% | 94% | 83% | 67% | 64% | 60% | 59% |
| 2022 | 100% | 100% | 100% | 100% | 100% | 94% | 87% | 75% | 69% | 62% | 61% | 65% |
| 2021 | 84% | 85% | 86% | 86% | 100% | 100% | 100% | 100% | 99% | 99% | 100% | 100% |
| 2020 | 98% | 99% | 100% | 100% | 100% | 99% | 97% | 91% | 87% | 86% | 83% | 81% |
| 2019 | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 98% | 98% | 98% |
| 2018 | 100% | 100% | 100% | 100% | 100% | 97% | 91% | 85% | 82% | 94% | 100% | 100% |
| 2017 | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 97% | 100% | 100% | 100% | 100% |
Frequently asked questions
Is Somerville Lake full?
Not quite. On Oct 28, 2026 Somerville Lake was 86.3% full, 1.90 feet below its full pool elevation of 238.00 ft. It was last full on Aug 13, 2026.
What is the normal level of Somerville Lake for this time of year?
Between 1996 and 2025, Somerville Lake averaged 89.5% full around Oct 28, and 8 in 10 years it was between 63.1% and 100.0%. Today it is −3.2 percentage points below that average.
What is the lowest Somerville Lake has been?
In the TWDB record, which starts in 1995, the lowest daily value was 38.0% on Nov 13, 2011. The highest was 100.0% on Nov 3, 1995.
How often is the Somerville 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 (150,293 acre-feet for Somerville 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.