Tembesi River is a river in Jambi province, Sumatra island, Indonesia, about 600 km northwest of the capital Jakarta.

The river flows in the central area of Sumatra with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).

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

The wettest month is December, with an average of 346 mm rainfall, and the driest is June, with 101 mm rainfall.

This article related to a river in Indonesia is a stub.