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IRONMANMay

IRONMAN Jacksonville

Jacksonville, Florida, United States

/5
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The race

A newer flat Florida race combining a current-assisted swim with a fast bike — heat and humidity are the challenge.

Course

SwimRiver

Current-assisted swim in the St. Johns River, warm brackish water and a quick point-to-point line.

Bike100 m (328 ft) elev.

Flat and fast loops on wide closed roads through northern Florida, no meaningful climbing.

Run40 m (131 ft) elev.

Flat multi-lap run along the Jacksonville riverwalk, warm and humid with limited shade.

Historical weather · May

Actual monthly averages from the last 3 years (Open-Meteo). Real race day may vary.

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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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