Busselton, Western Australia, Australia
The flattest and fastest race in the southern hemisphere, with a superb jetty swim and December summer conditions.
Single-lap swim around the historic 1.8 km Busselton Jetty in Geographe Bay — clear, calm and shallow.
Dead-flat three-lap course on smooth closed roads; the sea breeze in the afternoon is the only resistance.
Completely flat four-lap run along the foreshore and jetty precinct.
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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