Douarnenez-Treboul is a municipal marina, well equipped, carrying the Blue Flag, with two different basins. Treboul basin is accessible whatever the tidal conditions and has 525 berths. Port-Rhu basin is protected by a lock, and is famous to welcome the Douarnenez sea festival every 2 years and to host the start of the Mini Transat Race. Douarnenez also every year organises an international championship of Dragon Class.