ONS forecast points to above-average October inflows in southern Brazil
The operator expects strong water inflows in the South and Southeast/Centre-West, while North and Northeast projections remain below average.
- Publish date: 2026-10-05
- Category: Renewable Integration
- Original source: Agência Cenário Energia
- Reading time: 1 min
A wet September lifts southern inflow projections
A 5 October report on ONS’s weekly operating outlook said natural inflows for October were projected at 244% of the long-term average in the South and 128% in the Southeast/Centre-West. Forecasts were lower in the Northeast at 66% and in the North at 48%. ONS linked the stronger southern outlook to September’s highest rainfall across the system in 17 years.
Storage remains uneven across regions
Projected end-of-month reservoir storage was 86.9% in the South, 56.3% in the Southeast/Centre-West, 63.6% in the Northeast and 62.5% in the North. The same outlook put October system load growth at 4.7% year on year. These are operational forecasts from ONS’s weekly programme, not final measured October results.