Current conditions
Maps of observed precipitation conditions, individual graphics by basin are produced from MERGE/GPM data generated by INPE/CPTEC, considering the period from de 1998 a 2025. Between September 22 to October 21, 2026, below-average rainfall resulted in a precipitation deficit along the main course of the Amazon River in Brazilian and Peruvian territory, as well as in the watersheds of the Abacaxis, Aripuanã, Beni, Branco, Coari, Curuá Una, Içá, Iriri, Javari, Ji-Paraná, Juruá, Juruena, and Jutaí rivers, Madeira, Mamoré, and Marañon rivers; the left-bank basins of the Amazon River in the northeast of the state of Amazonas and the northeast and northwest of the state of Pará; the river basins of the Napo, Purus, Tapajós, Tefé, Teles Pires, Ucayali, and Xingu rivers; and the main course of the Solimões River; rainfall close to normal levels was recorded in the Guaporé, Japurá, and Negro river basins. The multi-model indicates, for the period from October 21 to October 27, 2026, a forecast of negative precipitation anomalies across the entire monitored region, with the greatest intensity expected in the watersheds of the Abacaxis, Branco, Curuá Una, and Iriri rivers; the left-bank basins of the Amazon River in the northeast of the state of Amazonas; the Tapajós and Tefé rivers; and the main course of the Solimões River.