Two women are stood laughing together in a lido setting after just completing a swim.    The woman on the left is wearing a green Macmillan swimming cap and has a green and white polka dot towel wrapped around her shoulders.    The woman on the right has her arm around the other with her hand resting on her shoulder. She is wearing a black soul cap and has a green and Macmillan towel wrapped around her shoulders as well.Two women are stood laughing together in a lido setting after just completing a swim.    The woman on the left is wearing a green Macmillan swimming cap and has a green and white polka dot towel wrapped around her shoulders.    The woman on the right has her arm around the other with her hand resting on her shoulder. She is wearing a black soul cap and has a green and Macmillan towel wrapped around her shoulders as well.

Go to great lengths for people living with cancer 

Almost 3.5 million people in the UK are living with cancer, and they need our support now more than ever.

That’s why we’re challenging you to fasten your goggles and swim 21 miles over June and July, the equivalent distance of the Channel, and raise £250 to fund our vital support services.

Do it in your wetsuit. Do it in your bathers. Do it in armbands. You don’t have to be an Olympian to make a hurculean difference.

Getting started is as easy as...

Sign up and join our Facebook community

Ask friends and family for support

Log your lengths and keep swimming!

Inspired by Swim It?

If you don't fancy swimming but would still like to show your support, you can donate to one of our Swim It fundraisers instead!