Reservoir · California · United States · CDEC
BERRYESSA
83.4% full
Capacity
1,976.38 hm³
Volume stored
1649 hm³
Coordinates
38.513°N, 122.104°W
Last updated
2026-10-08
Current fill
83.4%vs 7 days ago
-0.4%losing
vs 1 year ago
-1.4%year-over-year
7-day trend
→stable
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: 2026-10-08.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.513, -122.104 · Open in Google Maps
About BERRYESSA
As of October 8, 2026, BERRYESSA is filled to 83.4% of its total capacity, holding roughly 1,649 hm³ of water out of a maximum 1,976 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 1.4 points below its level on the same date a year earlier.
Across the readings we hold for BERRYESSA — 1825 data points between October 10, 2021 and October 8, 2026 — the level has ranged from a low of 49.3% (November 28, 2022) to a high of 100.3% (February 14, 2025). On average the reservoir is fullest around April and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 38.513°N, 122.104°W.
Key facts
- Current fill level
- 83.4%
- Water stored
- 1,649 hm³
- Total capacity
- 1,976 hm³
- 7-day change
- ▼ 0.4 pts
- Year-on-year
- ▼ 1.4 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 38.513°N, 122.104°W
- Last updated
- October 8, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 8 Oct 2026 | 83.4% | 1,649 |
| 7 Oct 2026 | 83.5% | 1,650 |
| 6 Oct 2026 | 83.5% | 1,651 |
| 5 Oct 2026 | 83.6% | 1,652 |
| 4 Oct 2026 | 83.6% | 1,653 |
| 3 Oct 2026 | 83.7% | 1,654 |
| 2 Oct 2026 | 83.7% | 1,655 |
| 1 Oct 2026 | 83.8% | 1,656 |
| 30 Sep 2026 | 83.8% | 1,657 |
| 29 Sep 2026 | 83.9% | 1,658 |
| 28 Sep 2026 | 83.9% | 1,659 |
| 27 Sep 2026 | 84.0% | 1,660 |