The Arade is a river in the Algarve, in the south of Portugal. The river flows through the municipalities of Silves, Lagoa and Portimão and has a length of 73 km. The river rises at 481 m altitude in the Serra do Caldeirão and flows into the Atlantic Ocean between Portimão and Ferragudo.
From Moorish times until the 19th century, the river was navigable up to Silves, where an important cork port existed at the time. Nowadays, only small boats can go this far upstream, partly because two dams have been built in the river.