Cold Water Dipping


Cardiff’s iconic reservoirs

Brought to you by Welsh Water

Cold Water Dipping

Discover the power of submerging into the refreshing and exhilarating world of cold water dipping in the most beautiful surroundings.

Cold water dipping is an invigorating and fun activity that can boost mental and physical health.

Why not join the Lisvane & Llanishen Reservoirs cold-water dipping community?

After a compulsory induction course, you are welcome to participate in regular dips, meet-ups and events.

Participants may dip in a wetsuit or in a ‘swimming skin’ (which is the cold-water dipping community’s name for a normal swimsuit).

Our dipping sessions take place in Llanishen Reservoir where water conditions are perfect with clean water and no currents or tides.

Unwind, stay fit and build resilience all year round!

Cold Water Dipping – Induction

The induction course is a one-off requirement prior to the first dip and covers cold dipping safety, best practice and advises on suitable equipment.

Participants learn about the mental and physical challenges involved and discover the fantastic wellbeing and health benefits that can be gained from cold-water immersion.

Induction accredited by the Institute for Outdoor Learning.

Induction Sessions – £22 per person

Saturday 23 March: 9am-1pm and 1pm-4pm

Saturday 30 March: 9am-1pm and 1pm-4pm

Friday 12 April: 9am-1pm and 1pm-4pm

Thursday 25 April: 5.30pm 

What You Get

A two-hour accredited induction followed by a guided dip in Llanishen Reservoir

Membership card

Course certificate


Once inducted, cold water dips will be available on Saturdays and Sundays 10.45am from April.

Venue Accreditation

Lisvane & Llanishen Reservoirs is a SAFE Cymru-Accredited venue.

SAFE Cymru has been developed by Swim Wales in close partnership with Welsh Triathlon and is recognised by Welsh Government, Sport Wales and AWWSG as the pinnacle of safe aquatic facility standards in Wales.

SAFE Cymru is helping us promote and progress open water swimming safely. Swim Wales’ world class standard will provide the appropriate resources and standards which are needed to ensure safe participation in Wales.

Safety First

We would remind you that unauthorised swimming at any of our reservoirs is prohibited and is extremely dangerous. Our open water swimming/dipping sessions are regulated under the close supervision of our fully-trained team. They only take place in strictly designated areas of the reservoir during pre-booked organised sessions.

The Dangers Of Unauthorised Swimming in Welsh Water Reservoirs

Automatic equipment located under the surface of the water, which can sometimes operate without obvious warning.

Very cold and deep water that can cause even strong swimmers to find themselves in difficulty.

Most reservoirs are remote or not easily accessible so the chance of rescue is greatly reduced.

Take Care

All of our activities are planned and delivered in such a way as to work with and preserve the very delicate natural environment we have on site. As such, we restrict numbers, access and types of activities to ensure our programme is delivered responsibly. If you have any questions, our team would be happy to explain.