Reservoir · Texas · United States · TWDB
Granger Lake
99.5% full
Capacity
63.92 hm³
Volume stored
64 hm³
Vs month average
111% of normal
Coordinates
30.693°N, 97.326°W
Last updated
2026-10-14
Current fill
99.5%vs 7 days ago
-0.2%losing
vs 1 year ago
+3.0%year-over-year
7-day trend
→stable
Drought context
Storage vs October average
111%of normal
99.5% full on 2026-10-14, against an average of 89.9% for October across 5 years of readings (+9.6 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 Granger Lake
As of October 14, 2026, Granger Lake is filled to 99.5% of its total capacity, holding roughly 64 hm³ of water out of a maximum 64 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.2 pts), and it is 3.0 points above its level on the same date a year earlier.
Across the readings we hold for Granger Lake — 1439 data points between October 18, 2022 and October 14, 2026 — the level has ranged from a low of 73.8% (October 22, 2023) to a high of 100.0% (February 2, 2023). On average the reservoir is fullest around April and at its lowest around November.
It is operated by TWDB primarily for multiple purposes. It lies within the Texas basin at 30.693°N, 97.326°W.
Key facts
- Current fill level
- 99.5%
- Water stored
- 64 hm³
- Total capacity
- 64 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▲ 3.0 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- TWDB
- Coordinates
- 30.693°N, 97.326°W
- Last updated
- October 14, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 14 Oct 2026 | 99.5% | 64 |
| 13 Oct 2026 | 99.5% | 64 |
| 12 Oct 2026 | 99.5% | 64 |
| 11 Oct 2026 | 99.6% | 64 |
| 10 Oct 2026 | 99.7% | 64 |
| 9 Oct 2026 | 99.7% | 64 |
| 8 Oct 2026 | 99.7% | 64 |
| 7 Oct 2026 | 99.7% | 64 |
| 6 Oct 2026 | 99.7% | 64 |
| 5 Oct 2026 | 99.5% | 64 |
| 4 Oct 2026 | 99.1% | 63 |
| 3 Oct 2026 | 98.4% | 63 |