It’s about TIME, not distance.

Turn your month into a swimming adventure. Whether you're at the pool, the beach, or a lake, the goal is simple:

Swim as much as you can throughout August.
Challenge yourself or compete with friends and family!

How much swimming can you CLOCK UP?

ENTER TODAY

6 hour - swimming around 1.5 hours a week
12 hour - swimming around 3 hours a week
24 hour - swimming around 6 hours a week
36 hour - swimming around 9 hours a week

Challenges

Individual (18+ only) - FREE

Team (family or group – Team Captain must be 18+) - FREE

Entry Options

FAQs

  • Summer Time Swim is a FREE challenge. Entry is free of charge. Some additional purchases may be available.

  • The challenge is to swim as much as you can between 1-31 August 2025

  • The team event is a collective challenge to swim as much as possible (within the rules and within your limits) in August. Each member of the team does not need to swim a set or the same distance. The collective time spent swimming by the team is recorded and submitted by the Team Captain

  • A maximum of 5 people are allowed in a STS team. Teams can include 1-5 swimmers. The Team Captain must be 18+ and a responsible adult.

  • The challenges include the 12 hour, 24 hour and 36 hour challenges

  • All you need to do is record the amount the amount of time you spend swimming (hh:mm:ss). Keep a record of each swim and the length of time taken. When you have achieved your target distance, submit your time on line (link to be provided). All results submissions need to be made before 23:45 31 August 2025. The results process will close on 1 September 2025.

  • There will be a live link to results. When you have completed your chosen challenge, log your result via the link on the home page. You will need to submit your R number (found on your confirmation email), your total time swum in hh:mm:ss format (e.g. 12:00:00 for 12 hours) and a single image. The image can be a photo of you doing your challenge, a photo/screenshot of your results. The results will show a list of all entrants who have successfully achieved either 12 hours, 24 hours or 36 hours of swimming in August.

  • Summer Time Swim is a recreational swimming challenge, participation in which is entirely at the risk of the individual participant concerned. We recommend that you always swim within your limits, that you allow enough time for rest in between each swim, that if you are swimming in open water that you do so with at least one other person at all times and that you hydrate before, during and after each swim. If you have any doubts about your ability to participate we recommend that you seek advice before doing so.

  • There is no fundraising requirement. The event is owned by a charity (Swimathon Foundation), and donations to the charity are welcome.  However, for now we’re keen to see how many people we can inspire to Swim as much as you can in August

  • The event is owned by UK charity, Swimathon Foundation, owner of Swimathon

  • There is no need to change distance, as everyone is entered into the same single challenge. You simply decide whether you’re going to attempt the 12 hour, 24 hour or 36 hour challenge. We ask which one you are intending to do in registration (for insight purposes), but this does not mean you have to stick to that particular challenge.

  • As a free event to enter, there is no need to defer your place in the event if you cannot make the event for any reason.

  • You can take part in any recognised swimming venue (indoor or outdoor). The swimming venues must have lifeguards present. If you are taking part in open water, you must swim with another competent swimmer at all times and observe local rules and conditions at all times.