IRONMAN PORTUGAL - CASCAIS: A Thrilling Triathlon Experience! Swim Course: Embark on a 3.8km swim along a scenic single-loop course in the protected waters of Cascais Bay. The average water temperature of 62°F / 17°C and a rolling swim start add a dynamic edge to the competition. Begin your swim at the picturesque Praia da Ribeira and culminate in front of the historic Fortress at the Clube Naval. Bike Course: Challenge yourself with a 180 km two-loop bike course, featuring breathtaking views ...