Maranhão
Portalegre · Alentejo · Tejo
Capacity
213 hm³
Coordinates
38.907°N, 8.150°W
Operator
RH5
86.3% full
Current fill
86.3%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
Drought context
Rain over the last three months · 21 September 2026
Near normal
In the three months to 21 September 2026 the area around Maranhão had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −0.43). Rain, not storage.
EU drought indicator · 11 September 2026
Noneno drought signal
The European Drought Observatory's combined reading of rain, soil moisture and vegetation at this point. Watch means rain has been short, Warning that the soil has dried out, Alert that vegetation is visibly stressed; Recovery means the shortfall is easing. Ground conditions, not the reservoir's storage. Portugal drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 213 hm³ |
| Usable capacity | 191.7 hm³ |
| Primary use | Multi-purpose |
| Operator | RH5 |
| River | Tejo |
| Province | Portalegre |
| Autonomous community | Alentejo |
| River basin | Tejo |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.907, -8.150 · Open in Google Maps
About Maranhão
As of October 15, 2026, Maranhão is filled to 86.3% of its total capacity, holding roughly 184 hm³ of water out of a maximum 213 hm³. At this level the reservoir is high. Of that total, about 192 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for Maranhão — 1 data points between October 15, 2026 and October 15, 2026 — the level has ranged from a low of 86.3% (October 15, 2026) to a high of 86.3% (October 15, 2026).
It is operated by RH5 primarily for multiple purposes. It lies within the Tejo basin at 38.907°N, 8.150°W.
Key facts
- Current fill level
- 86.3%
- Water stored
- 184 hm³
- Total capacity
- 213 hm³
- Usable capacity
- 192 hm³
- 7-day change
- No change
- Primary use
- Multipurpose
- River
- Tejo
- River basin
- Tejo
- Operator
- RH5
- Coordinates
- 38.907°N, 8.150°W
- Last updated
- October 15, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 15 Oct 2026 | 86.3% | 184 |