Open Water Swimathon

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Start your open water journey with Open Water Swimathon 2019 and join Cancer Research UK and Marie Curie to raise as much money as possible for two causes close to the nation’s hearts. 

Open Water Swimathon will take place from Saturday 7 - Sunday 8 September. We have a range of distances available (from 500m up to 5k), which makes it the perfect challenge for both experienced open water swimmers, and those transferring from the pool to the open water for the first time!

Choose to take part in an organised session at one of our registered venues or take part at a time and place which works for you with MySwimathon.



Start Your Open Water Journey with Open Water Swimathon 2019

Open Water Swimathon is back for a third year in 2019 and will be taking place on Saturday 7 – Sunday 8 September at a number of venues across the UK. Start your open water journey today with Open Water Swimathon 2019!

21,000 Swimmers Make a Splash for Charity Over Swimathon Weekend

The 32nd annual Swimathon, the world’s biggest fundraising swim, raised £1.8m for charity following Swimathon’s event weekend, with money still coming in

Swimathon Weekend Has Arrived!

This weekend, over 20,000 people will be swimming at more than 600 pools across the UK to help raise vital funds for Cancer Research UK and Marie Curie.

Sam Perrott - Swimathon Ambassador

Meet one of our Swimathon Ambassadors - Sam Perrott, and read about how her training is going for this year's Swimathon!

Mara Hafezi - Ambassador Day Blog

Meet one of our Swimathon Ambassadors - Mara Hafezi, and read about her experience at this year's Ambassador Day hosted by Olympic Gold Medalist and Swimathon President Duncan Goodhew!