San Sebastián
Zamora · Castile and León · Miño - Sil
Capacity
46 hm³
Coordinates
42.151°N, 6.925°W
Operator
CHS
50.0% full
Current fill
50.0%vs 7 days ago
0.0%stable
vs 1 year ago
+23.9%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 46 hm³ |
| Usable capacity | 41.4 hm³ |
| Primary use | Multi-purpose |
| Operator | CHS |
| Province | Zamora |
| Autonomous community | Castile and León |
| River basin | Miño - Sil |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.151, -6.925 · Open in Google Maps
About San Sebastián
As of July 27, 2026, San Sebastián is filled to 50.0% of its total capacity, holding roughly 23 hm³ of water out of a maximum 46 hm³. At this level the reservoir is within its normal operating range. Of that total, about 41 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 23.9 points above its level on the same date a year earlier.
Across the readings we hold for San Sebastián — 420 data points between July 17, 2018 and July 27, 2026 — the level has ranged from a low of 21.7% (November 24, 2020) to a high of 89.1% (January 3, 2023). On average the reservoir is fullest around May and at its lowest around October.
It is operated by CHS primarily for multiple purposes. It lies within the Miño - Sil basin at 42.151°N, 6.925°W.
Key facts
- Current fill level
- 50.0%
- Water stored
- 23 hm³
- Total capacity
- 46 hm³
- Usable capacity
- 41 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 23.9 pts
- Primary use
- Multipurpose
- River basin
- Miño - Sil
- Operator
- CHS
- Coordinates
- 42.151°N, 6.925°W
- Last updated
- July 27, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 27 Jul 2026 | 50.0% | 23 |
| 20 Jul 2026 | 50.0% | 23 |
| 14 Jul 2026 | 50.0% | 23 |
| 7 Jul 2026 | 52.2% | 24 |
| 30 Jun 2026 | 54.3% | 25 |
| 23 Jun 2026 | 60.9% | 28 |
| 16 Jun 2026 | 69.6% | 32 |
| 9 Jun 2026 | 69.6% | 32 |
| 2 Jun 2026 | 69.6% | 32 |
| 26 May 2026 | 69.6% | 32 |
| 19 May 2026 | 69.6% | 32 |
| 12 May 2026 | 65.2% | 30 |
Frequently asked questions
What is the current water level of San Sebastián?
As of July 27, 2026, San Sebastián is at 50.0% of its capacity, holding approximately 23 hm³ of water, according to embalses.net data.
Is San Sebastián reservoir full?
No. As of July 27, 2026, San Sebastián is within its normal operating range at 50.0% of its capacity, so it is not full.
Is the water level at San Sebastián rising or falling?
The level at San Sebastián has been broadly stable over the latest week on record (0.0 points).
How much water can San Sebastián hold?
San Sebastián has a total capacity of 46 hm³, of which about 41 hm³ is usable storage.
Where is San Sebastián reservoir located?
San Sebastián is located in Zamora, Castile and León, Spain, within the Miño - Sil basin (coordinates 42.151°N, 6.925°W).
What is San Sebastián used for?
San Sebastián is used primarily for multiple purposes, and is managed by CHS.