2026 REGISTRATION IS NOW OPEN!

BE PART OF THE ICONIC BWCI OPEN CASTLE SWIM.

This year's swim will be returning on Sunday 9th August 2026. Sign up now and enjoy being part of Guernsey's BWCI Open Castle Swim. 

This swim is open to everyone 10 years+ (must be 10 by day of swim). Whether you are living locally, a past Guernsey resident or someone from further afield. Every year hundreds of swimmers ready their suits to take part in this historic Guernsey charity event, hosted and promoted by the Guernsey Swimming Club. If you are unsure whether the event is for you, please check out all the information on the dedicated page on the Guernsey Swimming Club website and use the contact form to get in touch.

We would love to thank the events sponsor BWCI, who generously meet the costs of staging this event, ensuring that all money raised is donated to our chosen local charities. The Guernsey Swimming Club website provides all the information needed for those wishing to raise sponsorship as a swimmer and those who simply wish to support.

Please remember that in registering for the BWCI Open Castle Swim, you are agreeing to support those specific charities which have been chosen by the Guernsey Swimming Club and BWCI.