IRONMAN 70.3 Weymouth 2027
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.
2027 edition completed
This record covers the 12 September 2027 edition of IRONMAN 70.3 Weymouth in Weymouth, Dorset, with a 1.9 km swim, a 90 km bike and a 21.1 km run. This date belongs to a completed edition. The course record remains available. Course descriptions and coaching notes are archived context for this edition. Check the organiser for a future edition once its date and entry details are published.
47 weeks to race day: base season
Plenty of runway. This far out, the win is a boring, consistent base rhythm: aerobic volume, strength, technique. The structured block starts closer in; what you do now decides how high it can climb.
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.
Train locally, personally or in the app.
Choose the level of support that fits your week. Club sessions and coaching are separate services from app membership.
Build my complete road.
Commit to the date and the work gets a shape: your countdown starts, the emails arrive in step with your build, and the app anchors a recovery-led block so the final week lands exactly on race day.
One confirmation email, then the road begins. Registering for the race itself stays with the organiser.
“The branded 70.3 experience without leaving the country. Respect the sea swim: practise open water before September, not in it.”
The race
The course
Interactive swim route in the Course Lab above ↑ Drawn from the official GPX file, checked against this leg's distance.
One clockwise triangle straight out from Weymouth beach, two right turns and back to transition. Simple to sight and simple to pace, which is exactly what you want in September sea water.
Interactive bike route in the Course Lab above ↑ Drawn from the official GPX file, checked against this leg's distance.
One anticlockwise loop through rolling Dorset countryside north to King's Stag, then back via Godmanstone and Dorchester. Constantly undulating rather than steep, and that is what quietly empties your legs before the run.
Interactive run route in the Course Lab above ↑ Drawn from the official GPX file, checked against this leg's distance.
Two laps around Lodmoor Country Park, out to the Overcombe roundabout, back through the RSPB reserve and past transition before Greenhill Avenue. Greenhill is the hill everyone remembers, and you meet it twice.
Not yet confirmed for this edition: bike elevation gain, cut-off times, aid station spacing, water temperature history. We publish these only once they are on the official course page, so check there before you pace off anything here.
Course details verified against the official IRONMAN 70.3 Weymouth course page on 13 August 2026. Courses change; the official page is always the last word.
Questions, answered
When is IRONMAN 70.3 Weymouth 2027?
What distances can I race at IRONMAN 70.3 Weymouth?
How hard is the course?
What is the swim like?
How long do I need to train for it?
How do I enter?
Read before you race
Half Ironman Recovery Time: A Practical Return
How Much Harder Is a Full IRONMAN Than a 70.3?
IRONMAN 70.3 Tallinn Training Guide
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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 entry, always use the official event website.