Nadadouro is one of twelve civil parishes (freguesias) in the municipality of Caldas da Rainha, Portugal. The population in 2021 was 1,962, in an area of 10.60 km<sup>2</sup>.
The parish of Nadadouro borders the popular tourist destination of the Lagoa de ÃÂbidos which is a lagoon located in the municipalities ÃÂbidos and Caldas da Rainha, Portugal. It empties into the Atlantic Ocean at Foz do Arelho.