Reservoir · Texas · United States · USGS NWIS
Medina Lake
28.5% full
Capacity
314.34 hm³
Volume stored
90 hm³
Coordinates
29.540°N, 98.934°W
Last updated
2026-09-30
Current fill
28.5%vs 7 days ago
-0.4%losing
vs 1 year ago
+22.7%year-over-year
7-day trend
→stable
Data source: USGS National Water Information System (NWIS) — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-09-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 29.540, -98.934 · Open in Google Maps
About Medina Lake
As of September 30, 2026, Medina Lake is filled to 28.5% of its total capacity, holding roughly 90 hm³ of water out of a maximum 314 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 22.7 points above its level on the same date a year earlier.
Across the readings we hold for Medina Lake — 1461 data points between October 1, 2022 and September 30, 2026 — the level has ranged from a low of 1.9% (May 21, 2025) to a high of 30.1% (August 10, 2026). On average the reservoir is fullest around August and at its lowest around May.
It is operated by USGS primarily for multiple purposes. It lies within the Texas basin at 29.540°N, 98.934°W.
Key facts
- Current fill level
- 28.5%
- Water stored
- 90 hm³
- Total capacity
- 314 hm³
- 7-day change
- ▼ 0.4 pts
- Year-on-year
- ▲ 22.7 pts
- Primary use
- Multipurpose
- River basin
- Texas
- Operator
- USGS
- Coordinates
- 29.540°N, 98.934°W
- Last updated
- September 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Sep 2026 | 28.5% | 90 |
| 29 Sep 2026 | 28.6% | 90 |
| 28 Sep 2026 | 28.6% | 90 |
| 27 Sep 2026 | 28.7% | 90 |
| 26 Sep 2026 | 28.7% | 90 |
| 25 Sep 2026 | 28.8% | 90 |
| 24 Sep 2026 | 28.8% | 91 |
| 23 Sep 2026 | 28.9% | 91 |
| 22 Sep 2026 | 28.9% | 91 |
| 21 Sep 2026 | 28.9% | 91 |
| 20 Sep 2026 | 29.0% | 91 |
| 19 Sep 2026 | 29.0% | 91 |