Reservoir · Texas · United States · TWDB
Somerville Lake
90.0% full
Capacity
185.38 hm³
Volume stored
167 hm³
Vs month average
113% of normal
Coordinates
30.322°N, 96.526°W
Last updated
2026-10-14
Current fill
90.0%vs 7 days ago
-0.7%losing
vs 1 year ago
+4.1%year-over-year
7-day trend
→stable
Drought context
Storage vs October average
113%of normal
90.0% full on 2026-10-14, against an average of 80.0% for October across 5 years of readings (+10.0 points).
Data source: Texas Water Development Board (Water Data for Texas) — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-10-14.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
About Somerville Lake
As of October 14, 2026, Somerville Lake is filled to 90.0% of its total capacity, holding roughly 167 hm³ of water out of a maximum 185 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.7 pts), and it is 4.1 points above its level on the same date a year earlier.
Across the readings we hold for Somerville Lake — 1403 data points between October 15, 2022 and October 14, 2026 — the level has ranged from a low of 58.9% (December 19, 2023) to a high of 100.0% (April 14, 2023). On average the reservoir is fullest around June and at its lowest around December.
It is operated by TWDB primarily for multiple purposes. It lies within the Texas basin at 30.322°N, 96.526°W.
Key facts
- Current fill level
- 90.0%
- Water stored
- 167 hm³
- Total capacity
- 185 hm³
- 7-day change
- ▼ 0.7 pts
- Year-on-year
- ▲ 4.1 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- TWDB
- Coordinates
- 30.322°N, 96.526°W
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 90.0% | 167 |
| 13 Oct 2026 | 90.1% | 167 |
| 12 Oct 2026 | 90.1% | 167 |
| 11 Oct 2026 | 90.3% | 167 |
| 10 Oct 2026 | 90.4% | 168 |
| 9 Oct 2026 | 90.5% | 168 |
| 8 Oct 2026 | 90.7% | 168 |
| 7 Oct 2026 | 90.7% | 168 |
| 6 Oct 2026 | 90.9% | 168 |
| 5 Oct 2026 | 91.0% | 169 |
| 4 Oct 2026 | 91.2% | 169 |
| 3 Oct 2026 | 91.1% | 169 |