Swim Serpentine 2025

Swim Serpentine logo

Swim Serpentine 2023 from Serpentine Bridge

Swim with Whisper in Swim Serpentine on Saturday 20 September 2025! We already have an allocation of charity places for 2025, so you're welcome to apply now.

Whisper is a very high-impact charity that funds a children's hospital, a maternity unit, a free ambulance and a nursing school in Jinja, Uganda. We achieve all this on an annual donation budget of around £250,000. Every £22 donated allows us to treat a child, an average that includes some lengthy inpatient stays. We estimate that every £279 donated saves a life that would not otherwise have been saved.

Swim Serpentine is an annual swimming event that takes place in the Serpentine lake in London's Hyde Park. 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

 

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.

If you're interested in buying your own non-charity place directly from the event organisers, you should click the blue "Register your interest" button on the Swim Serpentine home page, and they will let you know in 2025 when the places are on sale. In 2024 the 2 mile places were in high demand and sold out within a few hours. Swimmers with their own places are of course very welcome to fundraise for us too.

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:

Whisper's Magical Children's Hospital

This is the ambulance in front of the hospital:

Ambulance in front of Whisper's hospital

This is one of our operating theatres:

Operating theatre

This is our delivery room in the maternity unit:

Delivery room

This is a lecture in our nursing school:

Nursing class

We can offer you:

 

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

 

Sleeping infant in hospital bed

Swim Serpentine 2025 Application Form

Invalid Input

That doesn't look like an e-mail address

Please select Yes or No

Please select Yes or No

Please select Yes or No

Please choose a distance

Invalid Input