Reservoir · California · United States · CDEC
WARM SPRINGS (LAKE SONOMA)
105.0% full
Capacity
302.2 hm³
Volume stored
319 hm³
Coordinates
38.723°N, 123.010°W
Last updated
2026-06-11
Current fill
105.0%vs 7 days ago
0.0%stable
vs 1 year ago
0.0%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: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.723, -123.010 · Open in Google Maps
About WARM SPRINGS (LAKE SONOMA)
As of June 11, 2026, WARM SPRINGS (LAKE SONOMA) is filled to 105.0% of its total capacity, holding roughly 319 hm³ of water out of a maximum 302 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it sits close to where it was a year earlier.
Across the readings we hold for WARM SPRINGS (LAKE SONOMA) — 1822 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 39.3% (December 9, 2022) to a high of 105.0% (March 8, 2023). On average the reservoir is fullest around March and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 38.723°N, 123.010°W.
Key facts
- Current fill level
- 105.0%
- Water stored
- 319 hm³
- Total capacity
- 302 hm³
- 7-day change
- No change
- Year-on-year
- No change
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 38.723°N, 123.010°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 105.0% | 319 |
| 10 Jun 2026 | 105.0% | 320 |
| 9 Jun 2026 | 105.0% | 320 |
| 8 Jun 2026 | 105.0% | 320 |
| 7 Jun 2026 | 105.0% | 320 |
| 6 Jun 2026 | 105.0% | 320 |
| 5 Jun 2026 | 105.0% | 320 |
| 4 Jun 2026 | 105.0% | 321 |
| 3 Jun 2026 | 105.0% | 321 |
| 2 Jun 2026 | 105.0% | 321 |
| 1 Jun 2026 | 105.0% | 321 |
| 31 May 2026 | 105.0% | 321 |
Frequently asked questions
What is the current water level of WARM SPRINGS (LAKE SONOMA)?
As of June 11, 2026, WARM SPRINGS (LAKE SONOMA) is at 105.0% of its capacity, holding approximately 319 hm³ of water, according to CDEC (CA DWR) data.
Is WARM SPRINGS (LAKE SONOMA) reservoir full?
WARM SPRINGS (LAKE SONOMA) is essentially full, sitting at 105.0% of capacity as of June 11, 2026.
Is the water level at WARM SPRINGS (LAKE SONOMA) rising or falling?
The level at WARM SPRINGS (LAKE SONOMA) has been broadly stable over the latest week on record (0.0 points).
How much water can WARM SPRINGS (LAKE SONOMA) hold?
WARM SPRINGS (LAKE SONOMA) has a total capacity of 302 hm³.
Where is WARM SPRINGS (LAKE SONOMA) reservoir located?
WARM SPRINGS (LAKE SONOMA) is located in California, United States, within the California basin (coordinates 38.723°N, 123.010°W).
What is WARM SPRINGS (LAKE SONOMA) used for?
WARM SPRINGS (LAKE SONOMA) is used primarily for multiple purposes, and is managed by CDEC.