IRONMAN Weymouth
IRONMAN 70.3 Weymouth on 20 September 2026 uses the sheltered water of Weymouth Bay for the 1.9 km swim, then 90 km through the Dorset hills before a flat 21.1 km along the esplanade.
The bay is one of the better sea swims in the series because Portland shelters it, so the water is usually flat even when the Channel is not. It is also cold by late September. This is a full-wetsuit race, and the swim is where most people abandon their pacing plan by going hard to stay warm.
The bike is where the day is decided. Dorset behind the coast is a run of short, steep climbs, and the elevation adds up quickly on a course that gets described as rolling.
The run is laps of the seafront and one of the most spectator-heavy stretches on the British calendar. If you have paced sensibly that helps. If you have not, it does not.
Who it's for
Built for experienced triathlon athletes.
Good fit if you…
- are experienced in triathlon and want a hard race
- want a well-known, high-status race
Maybe not if you…
- are brand-new to triathlon: start with something shorter
What should you know about IRONMAN Weymouth?
- Date
- Sunday, 20 September 2026
- Format
- Half / 70.3
- Water temp
- 15.9°C · 61°F
Need to know
When is IRONMAN Weymouth 2026?
IRONMAN Weymouth takes place on Sunday, 20 September 2026. Dates can move year to year, so confirm the exact day on the official race page before you book travel.
How do you register for IRONMAN Weymouth?
Where does IRONMAN Weymouth take place?
Weymouth, United Kingdom
FAQs
What do athletes ask about IRONMAN Weymouth?
Where is IRONMAN Weymouth held?
IRONMAN Weymouth is held in Weymouth, the United Kingdom. The race page has the venue location and a map, and links straight through to the official site for the precise start area.
What distances can you race at IRONMAN Weymouth?
IRONMAN Weymouth offers Half / 70.3. The Half / 70.3 is a 1.9 km swim, 90 km bike and 21.1 km run. Pick your distance and enter on the official site. Each format usually has its own start wave and cut-offs.
How hard is IRONMAN Weymouth?
IRONMAN Weymouth is rated competitive (4/5) for difficulty on FindMyNextRace, based on its distance, terrain, and the level of the field. Use that as a guide and match it to your current fitness before you commit.
What's the water temperature at IRONMAN Weymouth?
The swim at IRONMAN Weymouth is around 15.9°C (61°F), based on the official average for the venue. Water temperature drives wetsuit rules, so check the organiser's current wetsuit policy before race day.
How do I enter IRONMAN Weymouth?
You enter IRONMAN Weymouth through the official organiser. Registration is handled on their site, and FindMyNextRace links you straight there. Places for popular editions can sell out early, so register as soon as entry opens.
Is IRONMAN Weymouth part of a race series?
Yes, IRONMAN Weymouth is part of the IRONMAN series. Series events often share a qualification, points, or championship pathway, so if you're chasing the series, check how this race fits its calendar.
How should I train for IRONMAN Weymouth?
Training for IRONMAN Weymouth depends on your target distance and current fitness. Most athletes follow a structured block of 12–20 weeks for a Half / 70.3 effort. Build a plan tailored to your race date and level with AI Training Plan (https://aitrainingplan.app).
You might also like
Similar triathlon races.