Events / Swim

Aquasphere Cardiff Bay Swim 2024

Cardiff Bay is supplied by two rivers to form a 500-acre (2.0 km2) freshwater lake around the former dockland area south of the City Centre. The 'bay' was formerly tidal, with access to the sea limited to a couple of hours each side of high water but now provides 24-hour access through three locks.

Swimming in the Bay is only allowed when authorised by the Harbour Authority so by taking part in this event you will join an exclusive group of Cardiff Bay swimmers!

This event has been created primarily for triathletes looking to warm up or gain open water experience; however it is open to everyone and with four different distances this event has something for all from first time open water swimmers, to experienced swimmers looking for a challenge over a longer distance.


29 Jun 2024



Choose your distance

cardiff swim in water ready

Aquasphere Cardiff Bay Swim


29 Jun 2024

Swim: 400m

Find out more Cardiff Swim 400m 2024
Swimmer exiting the water in Cardiff

Aquasphere Cardiff Bay Swim


29 Jun 2024

Swim: 750m

Find out more Cardiff Swim 750m 2024
Cardiff Swim Red

Aquasphere Cardiff Bay Swim


29 Jun 2024

Swim: 1900m

Find out more Cardiff Swim 1900m 2024
Cardiff Triathlon Swimmer with Wheel and Pier Head Building

Aquasphere Cardiff Bay Swim


29 Jun 2024

Swim: 3800m

Find out more Cardiff Swim 3800m 2024

What's Included

Cardiff busy event village

Lively Event Village

Music, commentary, shopping, food and chill out zones.

Cardiff Bay Swimmers

Family Friendly Vibes

Family finishes and plenty to see and do.

cardiff swim in water ready

Lots of Support

Brilliant marshals, water safety and rescue boats

Slate Placeholder Current View

Slate Finisher Momentos

Locally bought to mark your achievement and provide a lasting, unique and usable momento

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Exclusive and Iconic Location

Join an exclusive group of Cardiff Bay swimmers

Cardiff Swim Ready

Professional Timing

Chip timing and online results

2017 Participant

Event Partners

Working with local communities