Challenge Gdańsk is a middle-distance race on Poland's Baltic coast, pairing a cool sea swim and fast coastal bike with a spectacular Old Town run finish.
1.9 km Baltic Sea swim off the Brzeźno or Sopot beaches; cool water (typically 17-19°C) and wetsuit-legal.
90 km flat to gently rolling ride on closed roads along the Tricity coast and inland; fast surface with occasional Baltic headwind.
21.1 km flat run through Gdańsk's Old Town and along the Motława river waterfront with strong crowd support.
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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