The Cubatão River is a river of Santa Catarina state in southeastern Brazil.

The sources of the river are in the 84,130 hectares (207,900 acres) Serra do Tabuleiro State Park, a mountainous region to the south west of Florianópolis covered in lush rain forest.

The river supplies water to the greater Florianópolis region.

[1] It enters the Atlantic to the south of the suburb of Palhoça.

This article related to a river in Santa Catarina is a stub.