SAO ROQUE
Santa Catarina · URUGUAI
Useful capacity
458.95 hm³
Coordinates
27.498°S, 50.805°W
Operator
ONS
104.7% of useful capacity
Current fill
104.7%of useful capacity
vs 7 days ago
+1.1 ppgaining
vs 1 year ago
+6.0 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
103%of normal
104.7% full on 2026-10-26, against an average of 101.2% for October across 2 years of readings (+3.5 points).
Rain over the last three months · 11 October 2026
Very wet
In the three months to 11 October 2026 the area around SAO ROQUE had much more rain than normal, 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 +1.83). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 795.67 hm³ |
| Usable capacity | 458.95 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | CANOAS |
| Province | Santa Catarina |
| River basin | URUGUAI |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 27.498°S, 50.805°W · Open in Google Maps
About SAO ROQUE
As of October 26, 2026, SAO ROQUE is at 104.7% of useful capacity, holding 480.6 hm³ of 458.95 hm³. Of the 795.67 hm³ total capacity, that is 60.4%. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has risen by 1.1 percentage points, and it is 6.0 points above its level on the same date a year earlier.
Across the readings we hold for SAO ROQUE — 59 data points between August 24, 2025 and October 26, 2026 — the level has ranged from a low of 18.0% (March 20, 2026) to a high of 104.9% (July 21, 2026). On average the reservoir is fullest around September and at its lowest around April.
It is operated by ONS primarily for hydroelectric power. It lies within the URUGUAI basin at 27.498°S, 50.805°W.
Key facts
- Current fill level
- 104.7% of useful capacity
- Water stored
- 480.6 hm³
- Total capacity
- 795.67 hm³
- Usable capacity
- 458.95 hm³
- 7-day change
- ▲ 1.1 pp
- Year-on-year
- ▲ 6.0 pp
- Primary use
- Hydroelectric power
- River
- CANOAS
- River basin
- URUGUAI
- Operator
- ONS
- Coordinates
- 27.498°S, 50.805°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 104.7% | 480.6 |
| 24 Oct 2026 | 102.0% | 468.2 |
| 23 Oct 2026 | 100.3% | 460.5 |
| 22 Oct 2026 | 100.9% | 463.1 |
| 21 Oct 2026 | 101.5% | 465.7 |
| 20 Oct 2026 | 102.2% | 469.2 |
| 19 Oct 2026 | 103.6% | 475.4 |
| 18 Oct 2026 | 103.9% | 477 |
| 30 Aug 2026 | 103.1% | 473.4 |
| 28 Aug 2026 | 100.9% | 463.1 |
| 11 Aug 2026 | 104.7% | 480.6 |
| 5 Aug 2026 | 104.6% | 480.1 |