Reservoir · California · United States · CDEC
SAN LUIS RESERVOIR
67.0% full
Capacity
2,501.93 hm³
Volume stored
1676 hm³
Vs month average
153% of normal
Coordinates
37.033°N, 121.133°W
Last updated
2026-11-01
Current fill
67.0%vs 7 days ago
-2.3 pplosing
vs 1 year ago
+14.2 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs November average
153%of normal
67.0% full on 2026-11-01, against an average of 43.7% for November across 6 years of readings (+23.3 points).
Drought Monitor at this site · 27 October 2026
Nonenot in a drought category
SAN LUIS RESERVOIR's coordinates fall outside every category on the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. California drought figures →
Data source: CDEC — California Dept of Water Resources — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-11-01.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 37.033°N, 121.133°W · Open in Google Maps
About SAN LUIS RESERVOIR
As of November 1, 2026, SAN LUIS RESERVOIR is filled to 67.0% of its total capacity, holding 1,676 hm³ of water out of a maximum 2,502 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 2.3 percentage points, and it is 14.2 points above its level on the same date a year earlier.
Across the readings we hold for SAN LUIS RESERVOIR — 1824 data points between November 3, 2021 and November 1, 2026 — the level has ranged from a low of 15.8% (November 3, 2021) to a high of 100.0% (April 6, 2023). On average the reservoir is fullest around April and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It is at 37.033°N, 121.133°W.
Key facts
- Current fill level
- 67.0% of total capacity
- Water stored
- 1,676 hm³
- Total capacity
- 2,502 hm³
- 7-day change
- ▼ 2.3 pp
- Year-on-year
- ▲ 14.2 pp
- Primary use
- Multipurpose
- Operator
- CDEC
- Coordinates
- 37.033°N, 121.133°W
- Last updated
- November 1, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 1 Nov 2026 | 67.0% | 1,676 |
| 31 Oct 2026 | 67.2% | 1,680 |
| 30 Oct 2026 | 67.4% | 1,687 |
| 29 Oct 2026 | 67.8% | 1,696 |
| 28 Oct 2026 | 68.2% | 1,707 |
| 27 Oct 2026 | 68.6% | 1,717 |
| 26 Oct 2026 | 68.9% | 1,724 |
| 25 Oct 2026 | 69.3% | 1,734 |
| 24 Oct 2026 | 69.4% | 1,736 |
| 23 Oct 2026 | 69.6% | 1,742 |
| 22 Oct 2026 | 69.8% | 1,746 |
| 21 Oct 2026 | 70.1% | 1,753 |