Ribeira Seca is the largest stream of the island of Santiago in Cape Verde.

[1] Located in the eastern part of the island, it flows through the municipalities of São Lourenço dos Órgãos and Santa Cruz.

Its source is near the highest point of the island, Pico de Antónia, from where it flows to the east to João Teves.

It turns to the northeast and flows into the Atlantic Ocean at Achada Fazenda, 2 km southeast of Pedra Badejo.

The estuary of the Ribeira Seca, Lagoas de Pedra Badejo, is an important wetland area.