IRONMAN Western Australia - Run Leg

This edition is listed as Marathon in Busselton, Western Australia, Australia.

Typical race-morning air at IRONMAN Western Australia - Run Leg averages 24°C across the last 10 years (about 19°C to 29°C in that window). The morning can still warm as you run. Use that range for planning, not as a promise for race day.

Inside about 14 days, use the live forecast on this page. Further out, use race morning history: it averages 24°C. Treat last year's day as a warning if it was an outlier, not as a forecast.

Heat, humidity, wind or a lumpier day than you hoped all raise the chance of a late fade. If the start feels easy, don't spend it. Back off early, and hold even effort even if that means slower than the A-goal. The preview on this page is the starting point. Full personalised splits sit in Race Pass or Pro.

About 10 m of climbing and 10 m of descent. Mostly flat. Almost all of it sits within 2%. No steep grades over 6%. No counted climbs.

It is an estimate of how the course and conditions could move your baseline. Your body still decides the rest: heat adaptation, fuelling, prep, mindset, how you race, and whether you can draft.

The free page covers conditions, course context and a finish preview. Full personalised pacing and weather-adjusted splits sit in Race Pass or Pro.