Eiras
Pontevedra · Galicia · Galicia Costa
Capacity
22 hm³
Coordinates
42.345°N, 8.481°W
Operator
AGA
59.1% full
Current fill
59.1%vs 7 days ago
-4.5%losing
vs 1 year ago
-4.5%year-over-year
7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 22 hm³ |
| Usable capacity | 19.8 hm³ |
| Primary use | Multi-purpose |
| Operator | AGA |
| Province | Pontevedra |
| Autonomous community | Galicia |
| River basin | Galicia Costa |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 42.345, -8.481 · Open in Google Maps
About Eiras
As of September 7, 2026, Eiras is filled to 59.1% of its total capacity, holding roughly 13 hm³ of water out of a maximum 22 hm³. At this level the reservoir is within its normal operating range. Of that total, about 20 hm³ is usable (live) storage.
Over the most recent week on record the fill level has fallen by 4.5 percentage points, and it is 4.5 points below its level on the same date a year earlier.
Across the readings we hold for Eiras — 419 data points between September 4, 2018 and September 7, 2026 — the level has ranged from a low of 50.0% (October 14, 2025) to a high of 100.0% (March 12, 2019). On average the reservoir is fullest around April and at its lowest around October.
It is operated by AGA primarily for multiple purposes. It lies within the Galicia Costa basin at 42.345°N, 8.481°W.
Key facts
- Current fill level
- 59.1%
- Water stored
- 13 hm³
- Total capacity
- 22 hm³
- Usable capacity
- 20 hm³
- 7-day change
- ▼ 4.5 pts
- Year-on-year
- ▼ 4.5 pts
- Primary use
- Multipurpose
- River basin
- Galicia Costa
- Operator
- AGA
- Coordinates
- 42.345°N, 8.481°W
- Last updated
- September 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Sep 2026 | 59.1% | 13 |
| 1 Sep 2026 | 63.6% | 14 |
| 25 Aug 2026 | 63.6% | 14 |
| 18 Aug 2026 | 72.7% | 16 |
| 11 Aug 2026 | 72.7% | 16 |
| 4 Aug 2026 | 72.7% | 16 |
| 28 Jul 2026 | 77.3% | 17 |
| 21 Jul 2026 | 81.8% | 18 |
| 14 Jul 2026 | 86.4% | 19 |
| 7 Jul 2026 | 86.4% | 19 |
| 30 Jun 2026 | 90.9% | 20 |
| 23 Jun 2026 | 95.5% | 21 |