UK swimming events
Wild swimming is booming in popularity as people search for a more immersive experience in the outdoors, both as a fun activity and an antidote to the stresses of modern life. The events listed here are hosted in rivers, lakes, outdoor pools and the great expanse of the ocean, meaning there's something for everyone, no matter whether you're an experienced seadog or are dipping a toe in for the first time.
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Choose your water
Sea, lake or river - or do it for charity.
Swimming events in 2025
Featured events are listed below - select a month/region or the map view to see all events.
- Sat 19 - Sun 20 Jul
- £35-£295
Belvoir Castle Triathlon and Multisport Festival
A jewel in the castle crown! Get active in the beautiful grounds and surrounding area of stunning Leicestershire in the discipline of your choice! Celebrate in the festival village afterwards.
- Kids triathlon 4
- Super sprint triathlon
- Sprint triathlon 2
- Olympic triathlon
- Half Ironman
- + 14 more races
- Fri 1 Aug - Fri 24 Oct
- FREE
Swim Marathon
Take on a challenge like no other as you swim a marathon or half marathon distance over 12 weeks and lift your health, wellbeing and fitness to the next level.
- Charity swim 2
- Sat 2 - Sun 3 Aug
- £31.99-£249.99
Craft Snowman Triathlon & Duathlon, Snowman Swim & Ogwen Yr Helgi Du Trail Runs
Awarded the Event of the Year (2021) in the Welsh Triathlon Awards, The Craft Snowman is well known as the toughest multi-terrain triathlon and duathlon in the UK. Plus swims and trail running events.
- Sprint triathlon
- Olympic triathlon
- Half Ironman
- Sprint duathlon
- 10K run
- + 5 more races
- Fri 29 Aug - Mon 1 Sep
- £10-£80
Something Wild Festival
A family-friendly trail running festival for all ages and abilities with Devon's best trail routes at its heart - plus sea swims, swimruns, guided runs, yoga, music, speakers, local food and camping!
- Trail run
- 5K run
- 10K run
- Sea swim
- Sprint swimrun
- + 7 more races
- Sun 21 Sep
- £32-£46
Dawlish Swim
Dawlish Warren is a fantastic location for a sea swim, regardless of experience level, plus the excellent Teignmouth Surf Life Saving Club team will be on hand to keep everyone safe.
- Sea swim 3
- Sun 21 Sep
- £30-£97
Eton Dorney Triathlon & Swims
The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for all levels of triathletes and swimmers to enjoy in an exclusive setting.
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Lake swim 4
- Sat 27 - Sun 28 Sep
- £35-£295
Hever Castle Triathlon and Multisport Festival
Get active in the award-winning grounds and surrounding Kent countryside in the discipline of your choice! Recruit your friends and celebrate completing your challenge in the festival village.
- Half Ironman
- Olympic triathlon
- Sprint triathlon 2
- Super sprint triathlon
- Novice triathlon
- + 17 more races
- Fri 15 - Sun 17 May 2026
- £30
Keswick Mountain Festival
The UK's top outdoor sports festival! Incredible entertainment, sports events, speakers, live music, activities, brand expo, bars, food, drink and much more.
- 5K run 2
- 10K run
- Half marathon
- 50K ultra run
- Fell run
- + 12 more races
- Fri 12 - Sun 14 Jun 2026
- £16-£105
Arla Great North Swim
The UK's biggest open water swimming event providing a fantastic opportunity for families, individuals, experienced and beginner swimmers to enjoy the open water.
- Lake swim 6
- Sat 27 Jun 2026
- £50
Bournemouth Pier to Pier Swim
Join over 1,200 swimmers and take on an epic 1.4 mile open water swim from Boscombe Pier to Bournemouth Pier. With every stroke, you’ll be powering lifesaving research.
- 1.4 miles sea swimming
Events featuring swimming
Full-body workouts in the open water.
Swimming events near me
Select your location for swims in your local area.