IRONMAN 70.3 Weymouth, Weymouth, Dorset

IRONMAN 70.3 Weymouth 2026

Weymouth, Dorset
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20 September 2026 Triathlon 70.3 Sea swimM-dotSeason target

The UK's IRONMAN 70.3 by the sea. A beach-start swim in Weymouth Bay, a rolling bike through the Dorset countryside, and a flat seafront run to the M-dot arch.

Terrain
Road
Rolling Dorset countryside
Elevation
Hilly
850m gain
Entry
£279+
Variable
Swim
Sea
Weymouth Bay, beach start
Wetsuit
Wetsuit-legal
usually 15–17°C
Region
South West
Weymouth, Dorset
Your runway

6 weeks to race day: the sharpening window

A full build no longer fits, but a sharp one does. This close in, the job is specificity and freshness: race-pace touches, open-water or brick rehearsal, and a taper your nervous system actually absorbs. No heroics; arrive fresh.

R
Recover
Fix the nervous system first. Sleep, HRV, and the noise out.
A
Align
Fit the plan to your actual life, not the one you wish you had.
C
Condition
Minimum effective dose. The right sessions, done fresh.
E
Execute
Race-week protocol, pacing, contingency. Nothing new on race day.
Predict your finish time The 70.3 training plan

Building for this one? 70.3 training plan covers the sessions, the weekly shape and how the block is paced. The R.A.C.E. Framework explains why it is built that way.

Abraham Spring, founder of Unbroken

“The branded 70.3 experience without leaving the country. Respect the sea swim: practise open water before September, not in it.”

Abraham Spring: founder, Unbroken

The race

Weymouth is the full IRONMAN production: branded everything, deep fields, and a finish arch that means something to people. The swim is the differentiator, a real sea swim with a beach start that rewards open-water practice. The bike rolls constantly through Dorset lanes. The run is flat along the seafront, four laps of noise. A serious, worthy end-of-season A-race.

Questions, answered

When is IRONMAN 70.3 Weymouth 2026?

IRONMAN 70.3 Weymouth takes place on 20 September 2026.

What distances can I race at IRONMAN 70.3 Weymouth?

70.3. Pick the distance that fits your training runway, not your ego: the right distance is the one you can arrive at fresh.

How hard is the course?

Road terrain, hilly profile with around 850m of climbing. Rolling Dorset countryside

What is the swim like?

Weymouth Bay, beach start. Wetsuit-legal, usually 15–17°C. Practise open water before race week, not during it.

How long do I need to train for it?

From today you have 6 weeks. Focus on sharpening and freshness rather than fitness you can no longer build.

How do I enter?

Entries are handled by the organiser, from £279. Use the Register button above: it goes straight to the official site.

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Photograph of Weymouth, Dorset: Jpbowen, CC BY-SA 4.0, via Wikimedia Commons. Not official race photography.

This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by IRONMAN 70.3 Weymouth or its organiser. Details are based on publicly available information; names are used descriptively to identify the event. For accurate, up-to-date information and to enter, always use the official event website.

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