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 2025/2026
Featured events are listed below - select a month/region or the map view to see all events.
- 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
- Sat 30 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
- 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
- 20% off
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.
20% off with code
- 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
- Sat 16 May 2026
- £29-£55
Roadford Lake Swim
Take the opportunity to swim in a superb lake swimming venue where you’re not normally allowed to swim! Come and make a weekend of it with lakeside camping too.
- Lake swim 5
- Sat 23 - Sun 24 May 2026
- £28-£245
- 20% off
Lough Cutra Castle Triathlon and Multisport Festival
Get active in the beautiful grounds and surrounding area of stunning South Galway in the discipline of your choice! Recruit your friends and celebrate your challenge in the festival village.
20% off
- Sprint triathlon 3
- Super sprint triathlon
- Novice triathlon
- Olympic triathlon
- Half Ironman
- + 17 more races
- Sat 6 - Sun 7 Jun 2026
- £15-£350
- 20% off
Chateau de Chantilly Triathlon and Multisport Festival
The majestic château hosts this epic multi-sport weekend for athletes of all levels, complete with a range of disciplines, festival village, friendly spectators and top reviews all-round!
20% off
- Ironman
- Half Ironman
- Olympic triathlon
- Sprint triathlon 2
- Super sprint triathlon
- + 12 more races
- Sat 6 Jun 2026
- £35-£54
Dartmouth Open Water Swim
A much-loved favourite in the outdoors calendar, the Dartmouth Open Water Swims offer a choice of distances in the clear waters of Blackpool Sands Beach for a wide range of swimming abilities.
- Sea swim 3
- 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 20 - Sun 21 Jun 2026
- £28-£245
- 20% off
Cholmondeley Castle Triathlon and Multisport Festival
Get active in the beautiful grounds and surrounding area of stunning Cheshire in the discipline of your choice! Bring your friends and celebrate completing your challenge in the festival village.
20% off
- Kids triathlon 5
- Novice triathlon
- Super sprint triathlon
- Sprint triathlon 2
- Olympic triathlon
- + 14 more races
- 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
- Sat 18 - Sun 19 Jul 2026
- £28-£245
- 20% off
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.
20% off
- Kids triathlon 4
- Super sprint triathlon
- Sprint triathlon 2
- Olympic triathlon
- Half Ironman
- + 14 more races
Events featuring swimming
Full-body workouts in the open water.
Swimming events near me
Select your location for swims in your local area.