IRONMAN 70.3 Swansea
Swansea, United Kingdom · July · IRONMAN 70.3
Why people love it
- Calm, enclosed dock swim with long straights
- Extensive closed Gower roads and praised volunteers
- Flat two-lap seafront run with big crowds
- Start, transition, finish and expo all close together
Watch out for
- Hilly bike with rough patches, cattle grids and cattle on course in 2026
- Heatwave conditions near 30 °C (86 °F) in 2025 and 2026
- Lapping congestion on the 1.5-loop bike
- Water can range from 16 °C (61 °F) to over 24 °C (75 °F)
- Elevation is not published
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 27% of the overall score.
- Racer satisfactionLoved4.1
Athletes praise organisation, volunteers and the red-carpet finish, even in heatwave conditions; the hilly bike divides opinion. · Medium confidence
- OrganizationWell run4.2
One 2026 racer rated organisation 9 out of 10 and logistics 10 out of 10; another praised registration and closure bollards. · Medium confidence
- First timer friendlyDoable3.3
A calm dock swim and a flat run help, but a hilly bike with rough patches and cattle grids is demanding. · Medium confidence
Course traits, not part of the score
- PR potentialAverage2.9
A hilly bike with mixed surfaces and lapping congestion slows riders; the run is flat and fast. · Medium confidence
- Course easeTough2.8
A hilly Gower bike and heat in 2025 and 2026, balanced by a calm swim and flat run. · Low confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.
- Wetsuit legalCoin flip3.4
About 16 °C (61 °F) is typical, but the water topped 24 °C (75 °F) in 2026 and the pro swim was non-wetsuit. · Medium confidence
- Water temperatureAcceptable3.4
Typically 16 °C (61 °F), though it reached 24 °C (75 °F) in the 2026 heatwave. · Low confidence
- Calm waterGlassy4.7
An enclosed dock with no current; a 2026 racer reported no chop. · High confidence
- Swim easeEasy4.3
Long straights, easy navigation and a rolling start. · Medium confidence
- Swim experienceGreat3.5
A dock swim from a pontoon is simple and calm, but urban rather than scenic. · Medium confidence
Bike
Road surface, closures, scenery and wind. Counts for 19% of the overall score.
- Road surfaceMixed2.8
Roughly half good and half rough, with sharp bridge sections and cattle grids. · Medium confidence
- Road closuresMostly closed4.2
Long full closures on many Gower roads, with bollards that athletes praised. · High confidence
- Bike sceneryBeautiful4.2
Oystermouth Castle, Mumbles lighthouse and open Gower commons. · Medium confidence
- WindSome wind3.0
Wind was not reported either way. · Low confidence
Course traits, not part of the score
- Bike speedAverage2.7
Hills, rough sections, cattle grids and lapping congestion on a 1.5-loop course; one racer's 2025 bike took 3:41. · Medium confidence
- Bike flatnessHilly2.4
Elevation is not published, but every account calls the Gower bike hilly. · Low confidence
- Bike simplicitySome technical parts3.0
Clifftop and Gower lanes with cattle grids and, in 2026, cattle on the course. · Low confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportStrong4.3
Packed seafront and city-centre sections with thousands of spectators. · High confidence
- Aid stationsGood3.8
Run aid stations and volunteers drew praise, with water sprays helping in the heat. · Medium confidence
- Run sceneryBeautiful4.2
Along Swansea Bay towards Mumbles, finishing near the Museum Park. · Medium confidence
- Run conditionsEasy3.8
Flat road surface, but little shade; heat near 30 °C (86 °F) made recent runs hard. · Medium confidence
Course traits, not part of the score
- Run flatnessFlat4.5
Flat two-lap promenade and cycle path run. · High confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.
- Air temperaturePleasant3.9
July highs usually 17 to 29 °C (63 to 84 °F), and the 2025 and 2026 races hit about 30 °C (86 °F). · Medium confidence
- Weather reliabilityVariable2.7
Welsh summer weather can swing from heatwave to rain; only two recent editions are documented. · Low confidence
- Venue beautyLovely4.0
A bay-side city with a castle, lighthouse and Gower coast. · Medium confidence
- Spectator friendlyEasy4.2
Two-lap seafront run and a compact city centre make athletes easy to watch. · Medium confidence
Course traits, not part of the score
- Low altitudeSea level5.0
A coastal city at sea level. · High confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.
- Hotel availabilityGood3.5
City-centre and Marina hotels and rentals are near the action, but 2,700 athletes fill them. · Low confidence
- Hotel valueNormal3.3
No race-week price data found. · Low confidence
- WalkabilityWalkable4.4
Transition, finish, swim start and expo are close together. · High confidence
- Travel easeOne connection3.2
Cardiff Airport is the nearest, so most travellers make a connection or drive from elsewhere. · Low confidence
- LogisticsSimple4.0
Everything is close together, though the bike has a large outer loop and a smaller inner loop. · Medium confidence
- Town and foodGood3.8
A city centre and Marina with plenty of options; few athletes comment. · Low confidence
Key facts
- Location
- Swansea, Wales, United Kingdom
- Typical month
- July
- Latest or next date
- 11 July 2027
- Organiser
- IRONMAN 70.3
- Field size
- About 2,700 athletes
- First held
- 2022
- Distances
- 1.9 km (1.2 mi) swim, 90 km (56 mi) bike, 21.1 km (13.1 mi) run
- Swim venue
- Prince of Wales Dock (enclosed sea water) (canal)
- Water temperature
- 16–24 °C (61–75 °F)
- Wetsuit
- Legal
- Swim start
- rolling
- Swim laps
- 1
- Bike laps
- 1.5
- Key climbs
- Gower hills and clifftop roads
- Run laps
- 2
- Run shade
- Little; seafront
- Air temperature
- 12–29 °C (54–84 °F)
- Humidity
- moderate
- Nearest airport
- Cardiff Airport (CWL)
- Where to stay
- City centre, Marina
- Booking
- City-centre and Marina hotels and rentals close to expo, finish and swim start.
What racers and reviewers say
- Enduraprep (Owain Bennett)Raced 2026 · blog · Positive
Hot-weather race report: calm 28:37 swim with no chop and a simple course, a hilly bike with road quality around 50/50 plus cattle grids and lapping congestion, and a flat road run slowed by heat near 30 C (86 F). Rates organisation 9/10, volunteers 10/10 and logistics 10/10, with everything close together.
“the surface over the bridge is really sharp”
- Tri Team Glos (Adam Pickard)Raced 2025 · blog · Positive
Local first-time 70.3 racer: 39:36 swim from a pontoon, a 3:41:11 bike through Mumbles and into the hills that ended with cramp, and a run made excruciating by heat though water sprays helped. Praised road-closure bollards, registration, run aid stations and the red-carpet finish.
- Swansea Bay News (2026 race photos)Raced 2026 · article · Positive
2026 race-day gallery: the hottest weekend of the year, 2,700 athletes, non-wetsuit swim from a rolling start, closed-road bike past Oystermouth Castle, Mumbles lighthouse and Gower commons with cattle wandering on course, and a packed seafront run.
- YouTube race vlog (Swansea 2026)Raced 2026 · video · Mixed
Vlogger's honest report on a race that did not go to plan; description only available from search result, so details on cause are unknown.
- RaceCheckRaced 2024 · aggregator · Mixed
Overall 3.6/5 from 3 ratings: logistics, navigation and safety 3.67, aid stations 3.33; tags flat and fast run, hilly bike and large festival atmosphere. No written reviews.
Show 4 more
- RaceRavesaggregator · Positive
Course summary: HARBOR swim, HILLY 1.5-loop bike through Mumbles and Gower, FLAT two-loop run. Expected conditions 24 C (75 F) highs, 12 C (54 F) lows and water around 16 C (61 F). No ratings yet.
- Visit Swansea Bay (road closures)article · Positive
Official closure schedule showing long full closures on many Gower roads (for example B4436 and A4118 sections for around 5-6 hours), a one larger outer loop plus smaller inner loop bike structure, and a two-lap run on the Swansea Bay cycle path.
- Tri247 (2026 results)Raced 2026 · article · Mixed
Pro results report: Harry Palmer three-peat and Lizzie Rayner's first Pro Series win after a crash at 80 km (50 mi) took out the women's leader; hot and non-wetsuit conditions.
- Swansea Council (2025 results)Raced 2025 · article · Positive
Council summary of the 2025 race, the UK's first IRONMAN Pro Series event: Palmer won in 3:51:18 and Matthews in 4:20:37, with thousands of athletes and spectators attending.
Sources
Pages we used for facts and ratings. See how we rate.
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