Reservoir · California · United States · CDEC
Lake Isabella
38.3% full
Capacity
700.62 hm³
Volume stored
269 hm³
Coordinates
35.646°N, 118.473°W
Last updated
2026-08-03
Current fill
38.3%vs 7 days ago
-3.2%losing
vs 1 year ago
-10.2%year-over-year
7-day trend
↓falling
Data source: CDEC — California Dept of Water Resources — 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: 2026-08-03.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.646, -118.473 · Open in Google Maps
About Lake Isabella
As of August 3, 2026, Lake Isabella is filled to 38.3% of its total capacity, holding roughly 269 hm³ of water out of a maximum 701 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 3.2 percentage points, and it is 10.2 points below its level on the same date a year earlier.
Across the readings we hold for Lake Isabella — 1824 data points between August 5, 2021 and August 3, 2026 — the level has ranged from a low of 6.4% (October 27, 2022) to a high of 96.8% (July 23, 2023). On average the reservoir is fullest around June and at its lowest around December.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 35.646°N, 118.473°W.
Key facts
- Current fill level
- 38.3%
- Water stored
- 269 hm³
- Total capacity
- 701 hm³
- 7-day change
- ▼ 3.2 pts
- Year-on-year
- ▼ 10.2 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 35.646°N, 118.473°W
- Last updated
- August 3, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 3 Aug 2026 | 38.3% | 269 |
| 2 Aug 2026 | 38.7% | 271 |
| 1 Aug 2026 | 39.1% | 274 |
| 31 Jul 2026 | 39.5% | 277 |
| 30 Jul 2026 | 40.0% | 280 |
| 29 Jul 2026 | 40.5% | 284 |
| 28 Jul 2026 | 41.0% | 287 |
| 27 Jul 2026 | 41.5% | 291 |
| 26 Jul 2026 | 42.0% | 294 |
| 25 Jul 2026 | 42.4% | 297 |
| 24 Jul 2026 | 42.9% | 301 |
| 23 Jul 2026 | 43.4% | 304 |
Frequently asked questions
What is the current water level of Lake Isabella?
As of August 3, 2026, Lake Isabella is at 38.3% of its capacity, holding approximately 269 hm³ of water, according to CDEC (CA DWR) data.
Is Lake Isabella reservoir full?
No. As of August 3, 2026, Lake Isabella is low at 38.3% of its capacity, so it is not full.
Is the water level at Lake Isabella rising or falling?
The level at Lake Isabella is falling — it dropped 3.2 percentage points over the latest week on record.
How much water can Lake Isabella hold?
Lake Isabella has a total capacity of 701 hm³.
Where is Lake Isabella reservoir located?
Lake Isabella is located in California, United States, within the California basin (coordinates 35.646°N, 118.473°W).
What is Lake Isabella used for?
Lake Isabella is used primarily for multiple purposes, and is managed by CDEC.