Half Distance Triathlon Cascais Portugal - Portugal’s mild climate and 3,000 hours of annual sunshine make it a top destination for athletes and families alike. This unforgettable triathlon in Cascais showcases the stunning Portuguese Riviera, featuring: Swim: A 1.9 km (1.2 mile) single-loop swim in the protected Ribeira Beach bay, with breathtaking views and enthusiastic crowds. Water temperatures in October range from 17-19°C (62.6-66.2°F). Bike: A scenic 90 km one-loop ride through the ...