Half distance · 12 September 2027
IRONMAN 70.3 Weymouth
Weymouth, United Kingdom
The race at a glance
- Circuit
- IRONMAN
- Distance
- Middle distance
- Terrain
- Road
- Swim
- 1.9 km
- Bike
- 90 km
- Run
- 21.1 km
- Date
- 12 Sept 2027
- Registration
- Sold out
- Swim venue
- Sea
- Average water temperature
- 17 °C
- Bike profile
- Rolling
- Bike elevation gain
- 1,043 m
- Run profile
- Flat
- High air temperature
- 19 °C
- Low air temperature
- 7 °C
- Overall cut-off
- 8 h 30 min
- First edition
- 2016
- Swim start
- Rolling start
Edition history
| 2026 | 20 Sept 2026 | Held |
|---|---|---|
| 2025 | 14 Sept 2025 | Held |
| 2024 | 15 Sept 2024 | Held |
| 2023 | 17 Sept 2023 | Held |
| 2022 | 18 Sept 2022 | Held |
| 2021 | 19 Sept 2021 | Held |
| 2019 | 22 Sept 2019 | Held |
| 2018 | 23 Sept 2018 | Held |
| 2017 | 17 Sept 2017 | Held |
| 2016 | 11 Sept 2016 | Held |
How the day is laid out
The swim is held in the sea. The wetsuit call is made on race morning, against the temperature measured then.
The organiser publishes 1.9 km of swimming, 90 km on the bike and 21.1 km of running.
The swim uses a rolling start: athletes enter the water a few at a time. The water is usually around 17 °C at this time of year.
The bike course is rolling, with about 1,043 m of climbing.
The run course is flat.
Typical temperatures for the month run from 7 to 19 °C. The overall cut-off is 8 h 30 min.
The race was first held in 2016.
Against the calendar
Where this race sits among the others
Ranks are computed across every race of the same distance.
Average water temperature
17 °C · median 21 °C
The 8th coldest of the 128 middle-distance races with a figure, across every circuit.
High air temperature
19 °C · median 25 °C
The 11th coolest of the 152 middle-distance races with a figure, across every circuit.
Bike elevation gain
1043 m · median 569 m
The 15th hilliest of the 105 middle-distance races with a figure, across every circuit.
33
races of this distance pair a rolling bike with a flat run, out of 159. 58 share the bike profile alone.
45
races across every distance fall in September, out of 354.
160
races are held in Europe. 28 of them in the same month as this one.
Questions about this race
- When is IRONMAN 70.3 Weymouth 2027?
- IRONMAN 70.3 Weymouth is held on 12 September 2027 in Weymouth, United Kingdom. The race is sold out.
- Is a wetsuit allowed at IRONMAN 70.3 Weymouth?
- Most likely. The average water temperature is 17 °C, below the 24.5 °C limit up to which wetsuits are allowed for age-group athletes. The official call is made on race morning.
- What is the cut-off at IRONMAN 70.3 Weymouth?
- The course closes 8 h 30 min after the start. Intermediate cut-offs after the swim and the bike are in the athlete guide.
- How hard is IRONMAN 70.3 Weymouth?
- The bike course climbs about 1043 m, the 15th hilliest of 105 half-distance races with a figure. The bike is labelled rolling and the run flat. Expect highs of about 19 °C on race day.
Where to stay
Hotels and rentals around the race venue, for the nights around race day.
Suggested stay: 10 Sept 2027 to 13 Sept 2027
The map is provided by Stay22. Bookings are made with the provider.
Races of the same distance in the same region
- Challenge Sanremo
Sanremo, Italy
- Date
- 4 Oct 2026
- Distance
- Middle
- Country
- IT
- IRONMAN 70.3 Versailles
Versailles, France
- Date
- 11 Oct 2026
- Distance
- Middle
- Country
- FR
- Challenge Barcelona
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- Date
- 25 Oct 2026
- Distance
- Middle
- Country
- ES
- IRONMAN 70.3 Costa Navarino, Peloponnese, Greece
Peloponnese, Greece
- Date
- 25 Oct 2026
- Distance
- Middle
- Country
- GR
- IRONMAN 70.3 Türkiye
Belek, Türkiye
- Date
- 1 Nov 2026
- Distance
- Middle
- Country
- TR
- IRONMAN 70.3 Vilamoura-Algarve
Vilamoura, Portugal
- Date
- 3 Apr 2027
- Distance
- Middle
- Country
- PT
- Greek Hero XTRI Solo Point Five
Ipsos, Greece
- Date
- 10 Apr 2027
- Distance
- Middle, extreme
- Country
- GR
- IRONMAN 70.3 Valencia
Valencia, Spain
- Date
- 18 Apr 2027
- Distance
- Middle
- Country
- ES
Entries are handled by the organiser
Registration and the athlete guide are on the official race page.