The river flows in the northern area of Papua with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).[3] The annual average temperature in the area is 21 °C. The warmest month is July, when the average temperature is around 22 °C, and the coldest is March, at 20 °C.[4] The average annual rainfall is 3489 mm. The wettest month is March, with an average of 444 mm rainfall, and the driest is July, with 162 mm rainfall.[5]
