Sierra Boyera
Córdoba · Andalusia · Guadalquivir
Capacity
39 hm³
Coordinates
38.272°N, 5.249°W
Operator
CHGu
76.9% full
Current fill
76.9%vs 7 days ago
-2.6%losing
vs 1 year ago
-5.2%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 39 hm³ |
| Usable capacity | 35.1 hm³ |
| Primary use | Multi-purpose |
| Operator | CHGu |
| Province | Córdoba |
| Autonomous community | Andalusia |
| River basin | Guadalquivir |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.272, -5.249 · Open in Google Maps
About Sierra Boyera
As of September 7, 2026, Sierra Boyera is filled to 76.9% of its total capacity, holding roughly 30 hm³ of water out of a maximum 39 hm³. At this level the reservoir is within its normal operating range. Of that total, about 35 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 2.6 percentage points, and it is 5.2 points below its level on the same date a year earlier.
Across the readings we hold for Sierra Boyera — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 0.0% (March 14, 2023) to a high of 100.0% (April 1, 2025). On average the reservoir is fullest around April and at its lowest around November.
It is operated by CHGu primarily for multiple purposes. It lies within the Guadalquivir basin at 38.272°N, 5.249°W.
Key facts
- Current fill level
- 76.9%
- Water stored
- 30 hm³
- Total capacity
- 39 hm³
- Usable capacity
- 35 hm³
- 7-day change
- ▼ 2.6 pts
- Year-on-year
- ▼ 5.2 pts
- Primary use
- Multipurpose
- River basin
- Guadalquivir
- Operator
- CHGu
- Coordinates
- 38.272°N, 5.249°W
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 76.9% | 30 |
| 1 Sep 2026 | 79.5% | 31 |
| 25 Aug 2026 | 79.5% | 31 |
| 18 Aug 2026 | 82.1% | 32 |
| 11 Aug 2026 | 82.1% | 32 |
| 4 Aug 2026 | 84.6% | 33 |
| 28 Jul 2026 | 84.6% | 33 |
| 21 Jul 2026 | 87.2% | 34 |
| 14 Jul 2026 | 87.2% | 34 |
| 7 Jul 2026 | 89.7% | 35 |
| 30 Jun 2026 | 92.3% | 36 |
| 23 Jun 2026 | 92.3% | 36 |