The 2027 London edition, held later in summer. Flat and technical throughout, with warmer dock water than the July date.
2 km swim in the Royal Victoria Dock, sheltered flat water in the heart of London's Docklands.
80 km on closed roads around the Docklands and Canary Wharf — pancake flat, multi-lap and highly technical with frequent corners and bridges.
18 km run on a flat multi-lap dockside circuit past the ExCeL and Royal Docks waterfront.
Actual monthly averages from the last 3 years (Open-Meteo). Real race day may vary.
Water temp uses athlete-reported values first, then official race data, then the marine archive (sea swims, measured at the nearest offshore point). Values tagged est. are modelled from recent air temperature for lakes and rivers, where no observational data exists.
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