Half IRONMAN 70.3 Knokke-Heist, Belgium, where the athletes come to test their mettle against the challenging course and unpredictable weather. Let's start with the swim segment. The swim takes place in the North Sea, which can be quite temperamental, but fear not, the water temperature is typically around 18-20°C. The athletes will start with a rolling start from the beach, before swimming 1.9 km in a clockwise direction around buoys. The views of the coastline and the Knokke-Heist skyline ...