The river flows in the southeast area of Sulawesi with predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).

[3] The annual average temperature in the area is 23 °C.

The warmest month is October, when the average temperature is around 26 °C, and the coldest is June, at 24 °C.

[4] The average annual rainfall is 2500 mm.

The wettest month is May, with an average of 387 mm rainfall, and the driest is September, with 68 mm rainfall.