The Kawa River (Wae or Wai Kawa) is a river of Seram Island, Maluku province, Indonesia, about 2500 km northeast of the capital Jakarta.
It flows in an easterly direction through the southern area of Manusela National Park, with many "small, fast-flowing rivers running through".
The river flows in the southern central region of Seram island with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification). The annual average temperature in the area is 22 ðC. The warmest month is December, when the average temperature is around 24 ðC, and the coldest is August, at 20 ðC. The average annual rainfall is 3137 mm. The wettest month is July, with an average of 494 mm rainfall, and the driest is October, with 89 mm rainfall.