[2] The river flows in the southern area of Southwest Papua with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).

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

The warmest month is December, when the average temperature is around 24 °C, and the coldest is August, at 22 °C.

[4] The average annual rainfall is 4797 mm.

The wettest month is June, with an average of 662 mm rainfall, and the driest is October, with 225 mm rainfall.