Races Half marathon · Swansea, UK
Swansea Half Marathon
Swansea Half Marathon is a flat half marathon in Swansea, UK, held each June. Almost completely flat with long straight coastal stretches out toward Mumbles — one of the UK's fastest halves. Early June is 12-17C with sea breeze. The Swansea Half Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Last updated 2026-07-03 · confirm dates & entries on the official race site
When
June
every year
Course
flat
Half marathon
Conditions
Early June is 12-17C with sea breeze.
Racing this course well
Almost completely flat with long straight coastal stretches out toward Mumbles — one of the UK's fastest halves.
The Swansea Half Marathon's flat profile means your pacing discipline, not the terrain, decides the day.
Pick your goal for Swansea
Pace charts, weekly structure and timelines for the most common half marathon goals:
Asked often
- When is the Swansea Half Marathon?
- It is held each June in Swansea, UK. Check the official Swansea Half Marathon site for the exact date and entry windows.
- Is the Swansea Half Marathon course flat?
- Almost completely flat with long straight coastal stretches out toward Mumbles — one of the UK's fastest halves.
- How should I train for the Swansea Half Marathon?
- Build for the course you'll actually race at the Swansea Half Marathon: flat terrain, June conditions. RunV generates a plan for your goal time and rebuilds it every time life interrupts the Swansea build.
Not sure what to target? Predict your half marathon time from a recent race →
More half marathon races
Build for Swansea — around your actual life
RunV engineers your block backwards from race day in June — and rebuilds it every time training doesn't go to script.
