Reservoir · Oklahoma · United States · USGS NWIS
Lake Ellsworth
31.5% full
Capacity
73.36 hm³
Volume stored
23 hm³
Coordinates
34.795°N, 98.369°W
Last updated
2026-08-13
Current fill
31.5%vs 7 days ago
-1.6%losing
vs 1 year ago
-35.0%year-over-year
7-day trend
↓falling
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: 2026-08-13.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.795, -98.369 · Open in Google Maps
About Lake Ellsworth
As of August 13, 2026, Lake Ellsworth is filled to 31.5% of its total capacity, holding roughly 23 hm³ of water out of a maximum 73 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 1.6 percentage points, and it is 35.0 points below its level on the same date a year earlier.
Across the readings we hold for Lake Ellsworth — 1460 data points between August 14, 2022 and August 13, 2026 — the level has ranged from a low of 31.5% (August 13, 2026) to a high of 105.0% (May 2, 2024). On average the reservoir is fullest around May and at its lowest around October.
It is operated by USGS primarily for multiple purposes. It lies within the Oklahoma basin at 34.795°N, 98.369°W.
Key facts
- Current fill level
- 31.5%
- Water stored
- 23 hm³
- Total capacity
- 73 hm³
- 7-day change
- ▼ 1.6 pts
- Year-on-year
- ▼ 35.0 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USGS
- Coordinates
- 34.795°N, 98.369°W
- Last updated
- August 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Aug 2026 | 31.5% | 23 |
| 12 Aug 2026 | 31.8% | 23 |
| 11 Aug 2026 | 32.1% | 24 |
| 10 Aug 2026 | 32.3% | 24 |
| 9 Aug 2026 | 32.4% | 24 |
| 8 Aug 2026 | 32.6% | 24 |
| 7 Aug 2026 | 32.8% | 24 |
| 6 Aug 2026 | 33.1% | 24 |
| 5 Aug 2026 | 33.3% | 24 |
| 4 Aug 2026 | 33.5% | 25 |
| 3 Aug 2026 | 33.6% | 25 |
| 2 Aug 2026 | 33.9% | 25 |
Frequently asked questions
What is the current water level of Lake Ellsworth?
As of August 13, 2026, Lake Ellsworth is at 31.5% of its capacity, holding approximately 23 hm³ of water, according to USGS NWIS data.
Is Lake Ellsworth reservoir full?
No. As of August 13, 2026, Lake Ellsworth is low at 31.5% of its capacity, so it is not full.
Is the water level at Lake Ellsworth rising or falling?
The level at Lake Ellsworth is falling — it dropped 1.6 percentage points over the latest week on record.
How much water can Lake Ellsworth hold?
Lake Ellsworth has a total capacity of 73 hm³.
Where is Lake Ellsworth reservoir located?
Lake Ellsworth is located in Oklahoma, United States, within the Oklahoma basin (coordinates 34.795°N, 98.369°W).
What is Lake Ellsworth used for?
Lake Ellsworth is used primarily for multiple purposes, and is managed by USGS.