Swansea Half Marathon
Swansea, United Kingdom · Saturday 29 August 2026
One of Wales’ premier half marathons, the Swansea Half offers a fast, flat, and scenic course along the breathtaking Swansea Bay coastline. Starting in the heart of the city, runners pass landmarks like Swansea Marina and Mumbles Pier, enjoying panoramic sea views for much of the race. The cheering crowds, live music, and strong local support create a vibrant atmosphere, while the cool coastal breeze helps keep conditions ideal.
Difficulty Calculator
h
:m
:s
Adjusted Time
1:41:15
Time difference: -3.8 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain36m
Elevation High23m
Elevation Low8m
Weather Forecast
High17°C
Low8°C
Chance of Rain96%
How hard is Swansea Half Marathon?
Easyharder than 5% of half marathons
Flattest / easiestHardest
On our difficulty model, Swansea Half Marathon plays about 1 minute faster than an average road half marathon for a 1:30 runner. It ranks #426 hardest of 450 half marathons we analyse, and #86 of 89 in United Kingdom. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Swansea Half Marathon?
Estimated finish times on this course versus the same effort on an average road half marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Swansea Half Marathon | Difference |
|---|---|---|
| 1:30:00 | 1:26:37 | −03:23 |
| 1:45:00 | 1:41:15 | −03:45 |
| 2:00:00 | 1:55:50 | −04:10 |
| 2:15:00 | 2:10:23 | −04:37 |
| 2:30:00 | 2:24:55 | −05:05 |
| 2:45:00 | 2:39:25 | −05:35 |
| 3:00:00 | 2:53:54 | −06:06 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Swansea Half Marathon 2026 Course Analysis
Swansea Half Marathon is a half marathon held in Swansea, United Kingdom. It is scheduled for Saturday 29 August 2026. The course is run on road surface with 36m of total climbing, with its high point near 23m above sea level. For registration and full race details, visit the official Swansea Half Marathon website.
Elevation Profile
This is a very flat course, with only 36m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.
Expected Race Day Weather
Based on historical weather data for August, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 8°C to 17°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a high chance of rain (96%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.
Surface Type: Road
Swansea Half Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Swansea Half Marathon against other half marathons to find the right race for your goals.
Half marathons of similar difficulty
If Swansea Half Marathon fits your goal, these courses play out about the same on our difficulty model.
Other Half Marathons in United Kingdom
Run the Blades Half Marathon
Eaglesham, United Kingdom
Road178m gainJuly 2026
Dundee Half Marathon
Dundee, United Kingdom
Road127m gainJuly 2026
Ilkley Half Marathon
Ilkley, United Kingdom
Road206m gainJuly 2026
Richmond Park 5k, 10k and Half Marathon - July
London, United Kingdom
Mixed209m gainJuly 2026
Richmond Park Half Marathon - August
London, United Kingdom
Mixed209m gainAug 2026