Train for the Swansea Half Distance Triathlon — With a Plan Designed Just for You ✅ 1.2-mile swim in the Prince of Wales Dock Expect calm waters around 60°F (16°C). Our swim-focused training builds technique and endurance through video-guided drills, helping you stay efficient and confident—even in cooler water temperatures. ✅ 56-mile bike across hilly terrain through Mumbles and Gower Peninsula The undulating course requires sustained strength and smart pacing. The plan includes threshold ...