FURNAS
Minas Gerais · GRANDE
Useful capacity
15,949.14 hm³
Coordinates
20.669°S, 46.314°W
Operator
ONS
64.2% of useful capacity
Current fill
64.2%of useful capacity
vs 7 days ago
-0.2 pplosing
vs 1 year ago
+27.1 ppyear-over-year
7-day trend
→stable
Drought context
Storage vs October average
126%of normal
64.2% full on 2026-10-28, against an average of 50.8% for October across 2 years of readings (+13.4 points).
Rain over the last three months · 11 October 2026
Moderately wet
In the three months to 11 October 2026 the area around FURNAS had more rain than 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 +1.14). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 21,570 hm³ |
| Usable capacity | 15,949 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| Province | Minas Gerais |
| River basin | GRANDE |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 20.669°S, 46.314°W · Open in Google Maps
About FURNAS
As of October 28, 2026, FURNAS is at 64.2% of useful capacity, holding 10,246 hm³ of 15,949 hm³. Of the 21,570 hm³ total capacity, that is 47.5%. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.2 pp), and it is 27.1 points above its level on the same date a year earlier.
Across the readings we hold for FURNAS — 65 data points between October 28, 2025 and October 28, 2026 — the level has ranged from a low of 31.1% (December 12, 2025) to a high of 68.6% (July 3, 2026). On average the reservoir is fullest around July and at its lowest around December.
It is operated by ONS primarily for hydroelectric power. It lies within the GRANDE basin at 20.669°S, 46.314°W.
Key facts
- Current fill level
- 64.2% of useful capacity
- Water stored
- 10,246 hm³
- Total capacity
- 21,570 hm³
- Usable capacity
- 15,949 hm³
- 7-day change
- ▼ 0.2 pp
- Year-on-year
- ▲ 27.1 pp
- Primary use
- Hydroelectric power
- River basin
- GRANDE
- Operator
- ONS
- Coordinates
- 20.669°S, 46.314°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 64.2% | 10,246 |
| 27 Oct 2026 | 64.9% | 10,345 |
| 26 Oct 2026 | 64.7% | 10,326 |
| 25 Oct 2026 | 64.7% | 10,314 |
| 24 Oct 2026 | 64.5% | 10,294 |
| 23 Oct 2026 | 64.5% | 10,284 |
| 22 Oct 2026 | 64.5% | 10,284 |
| 21 Oct 2026 | 64.4% | 10,274 |
| 20 Oct 2026 | 64.4% | 10,274 |
| 19 Oct 2026 | 64.3% | 10,254 |
| 18 Oct 2026 | 64.2% | 10,243 |
| 17 Oct 2026 | 64.3% | 10,263 |