Welcome to the 40th Anniversary Swimathon!

Friday 20th – Sunday 22nd March 2026 at 450+ pools across the UK

Since 1986, Swimathon has united swimmers of all ages, abilities, shapes, and sizes in a national celebration of swimming and fundraising. In 2026, we proudly mark 40 years of this iconic event — and we’re hugely grateful you’ll to be part of it!

From a solo 500m challenge to the Team 5k, there’s something for everyone. Whether you're taking your first strokes or swimming for a personal best, it’s all about having fun and achieving your goals — all while supporting vital causes.

💛 Supporting Charities That Matter

Over the last four decades, Swimathon has raised over £50 million for charities. In 2026, we’re proud to support:

Cancer Research UK – advancing the fight against cancer

Marie Curie – supporting people living with terminal illness, and,

Swimathon Foundation – funding community swim projects across the UK

Together, we can make waves of change. We encourage all swimmers to share their stories and inspire others to dive in and make a difference.

🔗 Find Out More

Visit swimathon.org to learn more about the event, choose your challenge, and get involved.

Let’s make the 40th Anniversary Swimathon our biggest and best yet!