Clube Náutico de São Martinho do Porto is a nonprofit sporting association based in São Martinho do Porto, Portugal. Created for local residents, families and visitors, the club promotes access to the sea and opportunities to enjoy the bay and ocean through nautical activities. It also supports people whose livelihoods are connected to the sea.

The club helps operate the port and provides services for boaters, including quay access, mooring, boat preparation and a garage. Members and visitors can rent nautical equipment and materials, while recreational boaters can access support related to using their vessels. The club also offers sailing instruction through its sailing school, alongside training and activities connected with recreational navigation.

Membership is an important part of the club’s community focus, and its services are designed to make time on the water more accessible. Clube Náutico de São Martinho do Porto is officially recognized as an entity of public utility in Portugal.