The Kadassa River (Indonesian: Luku Kadahang) is a river of Sumba, East Nusa Tenggara, Indonesia.

[1][2][3] The river flows along the northern area of Sumba with predominantly tropical savanna climate (designated as As in the Köppen-Geiger climate classification).

[4] The annual average temperature in the area is 26 °C.

The warmest month is October, when the average temperature is around 32 °C, and the coldest is January, at 24 °C.

The wettest month is February, with an average of 206 mm rainfall, and the driest is September, with 8 mm rainfall.