🏊 Swim Serpentine 2026

Thank you for your interest in swimming with Whisper in Swim Serpentine 🥇on Saturday 19 September 2026!

Registration for the 2026 event has now closed.

We have charity places for 2026 and you are very welcome ❤️ to apply for one using the form below.

There's also an excellent chance of getting your own general entry (non-charity) place for 2027 if you go to the Swim Serpentine event website and click on the blue Register your interest button.

If you would prefer a general entry place (a non-charity place, with no fundraising requirement) then you can still buy one if on Thursday 5 February 2026 at 11am you follow the link from the Swim Serpentine event website to the booking site LetsDoThis.com. 2-mile general entry places in particular sell out very quickly 🏃‍💨, perhaps even within the first hour, so set yourself a reminder ⏱️.

Whisper offers you and your supporters a cause where even small donations can be life-changing ✨. We're a very high-impact charity that funds Whisper's Magical Children's Hospital 🏥, a maternity unit 🤰🏾, an ambulance 🚑 and a nursing school 🎓 in Jinja, Uganda. We run on an annual donation budget of around £250,000. Every £15 donated allows us to treat a child, an average that includes some lengthy inpatient stays 🤒. We estimate that every £364 donated saves a life that would not otherwise have been saved 🧸. Outside Uganda we're entirely staffed by volunteers 💖, helping donations go further.

Swim Serpentine is an annual swimming event 🏆 that takes place in the Serpentine lake 🦆 in London's Hyde Park. It's a pleasant day out even as a spectator 🥳; tell your friends! You can find out more about the event on the official site. There are several available distances:

Distance Equivalent in lengths of a 25m pool
Half mile 32
One mile 64
Two miles 129
Six miles (not offered by Whisper) 386

For comparison, a two mile swim takes less time than a half marathon 🏃 and takes less energy, but efficient technique ⏱️ is important for a swim. A six mile swim is similar to a marathon in time and energy.

In return for a place we'd like you to donate or commit to raising at least £150 (Half Mile), £200 (One Mile) or £300 (Two Miles) for us. We have optional corporate matched giving 🎁 available which can significantly help you to reach these targets.

Let's take a quick tour 👀 of some of the things we do. This is Whisper's hospital; the hospital opened on another site in 2016 and moved to this building in 2018:

This is the ambulance in front of the hospital:

This is one of our operating theatres:

This is our delivery room in the maternity unit:

This is a lecture in our nursing school, which has 40 nurses in its latest intake:

We can offer you:

  • personal attention - we're a small organisation 🙏
  • no registration fee
  • advice and practical help with fundraising
  • optional corporate matched giving, to help you meet your target or to raise more
I cannot tell you how inspiring this charity is. They do incredible work. I am raising money for Whisper but the support I am getting from them is fantastic. I have never had this before when raising money for charity. a previous runner in the London Marathon

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Swim Serpentine 2026 Application Form

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Phone number is optional, but it may be helpful if we can contact you by SMS or WhatsApp if we can't reach you by email.

Are you available to take part in the event on 19 September 2026?(*)
Are you available to take part in the event on 19 September 2026?
Please select Yes or No

Will you be at least 12 years old (half mile), 16 (one mile or two miles) on 19 September 2026?(*)
Will you be at least 12 years old (half mile), 16 (one mile or two miles) on 19 September 2026?
Please select Yes or No

Would you commit to raising at least £150 (Half Mile places), £200 (One Mile places), £300 (Two mile places) for us?(*)
Would you commit to raising at least £150 (Half Mile places), £200 (One Mile places), £300 (Two mile places) for us?
Please select Yes or No

Which distance would you like to swim?(*)
Which distance would you like to swim?
Please choose a distance

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