Make a splash. Make it matter.  

How much would your friends sponsor you to take a freezing dip in the sea or lake during Winter? Sign up to the Big Dip and raise money to power dementia research so that we can find a cure. We can’t do it alone, but together we can beat it.  

Whether it's in your local lake or you brave the sea - pick your location and take the plunge during the Winter months! Every pound you raise will help us support more people affected by dementia.

So what are you waiting for? Make it matter and order a free fundraising pack today.   

How to get started

 Fill in our online form and we'll send you a fundraising pack
Choose where you'll take your dip!
Tell your friends and family and get fundraising
Take on the Big Dip and help beat dementia

What you’ll get 

When you fundraise for us, you will receive: 

  • a welcome pack with tips to get you started and fundraising help
  • free cotton t-shirt when you sign up
  • online fundraising hub and materials 
  • support from our dedicated events team
  • a free swimming cap when you raise £100
  • access to professional coaches if you want to pursue more swimming challenges 


How do I get my swimming cap?

As soon as you have raised £100 just pop us an email and we will get a cap sent out to you!

Where can I get a sponsorship form?

A sponsorship form will be in your event fundraising pack and you can download one too. We can of course send more copies in the post if you need them - simply email us at [email protected] to request this. 

How much do I have to fundraise?

There’s no minimum fundraising target, but if you raise £100 or more you will receive an Alzheimer’s Society swimming cap. The more you raise, the more you will be helping people affected by dementia.

Can we take part as a group?

Yes, and we'd recommend that you do it with others for safety reasons. Just ask each group member to sign up here. You can also set up a JustGiving page as a group or individually.

Where can I do the Big Dip?

Whether you go to the seaside or a lake, you choose where you want to make a splash! Go with your friends and family, or check local websites for an organised Dip that may be happening near you. 

How can I fundraise?

Our handy pack and online fundraising hub contain all kinds of tips and advice for fundraising. There are a whole host of ideas, from cake sales to quizzes. Setting up a JustGiving page is easy and if you share it with friends and family on social media they can see your achievements.

How do I contact you?

If you have any questions just email the Challenge team or call us on 0330 333 0804

How your money helps 

Your swim could have a life-changing impact for people affected by dementia: 

£5 could pay for 200 dementia helpcards, which can be used to get help or assistance and let people know who to contact if needed.

£100 covers Alzheimer's Society's cost of supporting one patient with early stage Alzheimer's for three months on one of our vital trials.

£208 would fund one of our Side by Side services for a day. This one-to-one volunteer programme empowers people with dementia to keep on doing the things they enjoy.

What others say

'My friends thought I was crazy, but taking on the big dip for Alzheimer's Society was an exhilarating start to the year!’ - Sue from London

'My family and I wanted to do something different to mark the end of the year. We had a great time and met some lovely people whilst braving the freezing cold sea in December!' - Lucy from Newcastle