Guia 3 Border Bulletin: September 2026

The dollar exchange rate in September 2026 averaged R$ 5.14, with a low of R$ 5.09 and a high of R$ 5.22, according to Guia 3 (data from AwesomeAPI).

Iguazu River Flow

The average flow measured at the Hotel Cataratas station was 5,244 m³/s, with a peak of 10,107 m³/s. There were 7 days above 6,500 m³/s, a level that usually triggers the preventive closure of the Devil’s Throat in the Argentine park. The typical long-term average flow of the river is ~1,500 m³/s, meaning the month ran with the river 250% fuller than normal.

Passengers at Foz Airport

In September 2026 Foz Airport handled 228,021 passengers, a 36.3% increase over the same month in 2025, according to ANAC data.

Fuel Prices

Regular gasoline in Foz cost R$ 6.45 per liter (ANP). In Argentina, super gasoline cost R$ 7.76 per liter, calculated with the blue dollar rate, making refueling 20% more expensive in Argentina.

Itaipu Generation

The Itaipu plant generated an average of 237.1 GWh per day in September 2026 (ONS). Each GWh equals the daily consumption of approximately 200,000 households, meaning the produced energy corresponds to the daily consumption of about 47.4 million homes – most of it goes to the Brazilian Interconnected System, while almost all Paraguayan consumption is covered by its quota.

What this means for you:

• The dollar is stable but still above R$ 5.00, so plan foreign-currency expenses carefully.
• The river is far above normal; if you plan to visit the Devil’s Throat, check the park’s opening before going.
• The increase in passengers indicates higher tourist flow; expect longer lines at airport services.
• Refueling in Argentina is more expensive; consider filling up in Foz before crossing the border.
• Itaipu’s energy is mainly used outside the border region; there is no direct impact on Foz or Ciudad del Este’s power supply.

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Monthly bulletin generated from open data series of Guia 3 (official sources: ANA, ANAC Brazil and Argentina, ANP, Secretaría de Energía AR, Comex Stat/MDIC, ONS, AwesomeAPI). Reusable data with credit — open data.