TUCURUI
Pará · TOCANTINS
Useful capacity
38,982.4 hm³
Coordinates
3.834°S, 49.645°W
Operator
ONS
58.9% of useful capacity
Current fill
58.9%of useful capacity
vs 7 days ago
-3.1 pplosing
vs 1 year ago
-6.3 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
92%of normal
58.9% full on 2026-10-26, against an average of 63.9% for October across 2 years of readings (-5.0 points).
Rain over the last three months · 11 October 2026
Severely dry
In the three months to 11 October 2026 the area around TUCURUI had far less rain than normal, a shortfall seen about one year in fifteen. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.76). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 50,275 hm³ |
| Usable capacity | 38,982 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | Pará |
| River basin | TOCANTINS |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 3.834°S, 49.645°W · Open in Google Maps
About TUCURUI
As of October 26, 2026, TUCURUI is at 58.9% of useful capacity, holding 22,945 hm³ of 38,982 hm³. Of the 50,275 hm³ total capacity, that is 45.6%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 3.1 percentage points, and it is 6.3 points below its level on the same date a year earlier.
Across the readings we hold for TUCURUI — 65 data points between October 26, 2025 and October 26, 2026 — the level has ranged from a low of 28.2% (December 26, 2025) to a high of 99.7% (April 24, 2026). On average the reservoir is fullest around May and at its lowest around December.
It is operated by ONS primarily for hydroelectric power. It lies within the TOCANTINS basin at 3.834°S, 49.645°W.
Key facts
- Current fill level
- 58.9% of useful capacity
- Water stored
- 22,945 hm³
- Total capacity
- 50,275 hm³
- Usable capacity
- 38,982 hm³
- 7-day change
- ▼ 3.1 pp
- Year-on-year
- ▼ 6.3 pp
- Primary use
- Hydroelectric power
- River basin
- TOCANTINS
- Operator
- ONS
- Coordinates
- 3.834°S, 49.645°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 58.9% | 22,945 |
| 25 Oct 2026 | 59.7% | 23,284 |
| 24 Oct 2026 | 60.4% | 23,526 |
| 23 Oct 2026 | 60.8% | 23,697 |
| 22 Oct 2026 | 61.3% | 23,877 |
| 21 Oct 2026 | 61.5% | 23,970 |
| 20 Oct 2026 | 61.8% | 24,079 |
| 19 Oct 2026 | 62.0% | 24,161 |
| 18 Oct 2026 | 62.2% | 24,239 |
| 17 Oct 2026 | 62.6% | 24,407 |
| 16 Oct 2026 | 63.0% | 24,547 |
| 15 Oct 2026 | 63.7% | 24,840 |