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Kailua-Kona, Hawaii

Ironman World Championship Kona weather

Kona rewards athletes who can manage exposed heat, crosswinds and fast-changing coastal conditions.

IronmanOctoberOcean swim

Typical race window

October weather in Kailua-Kona, Hawaii

Monthly climate normal from 2016-2025 archive data.

October
Air temperature

22°C-28°C

Average wind

11 km/h

Peak daily wind

31 km/h

Wet-day chance

58%

A typical day in October averages 3.4 mm of precipitation, with average gusts around 31 km/h. Treat this as planning context, not a live forecast.

Jan

25°C

Feb

25°C

Mar

25°C

Apr

26°C

May

26°C

Jun

26°C

Jul

27°C

Aug

28°C

Sep

28°C

Oct

28°C

Nov

27°C

Dec

26°C

Swim

The pier swim is usually warm and exposed to ocean chop, glare and local water movement.

Bike

The Queen Ka'ahumanu Highway can turn wind direction and gusts into the defining race-day variable.

Run

Heat, humidity and UV are usually the main run constraints, especially after the energy lab turnaround.

Live race-day forecast

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This race page stays evergreen. For date, start time and expected segment durations, open the race-day planner with Kailua-Kona, Hawaii prefilled.

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