More than £5,000 was raised in 2021 when dozens of people left their bathers at home and took a swim at L’ancresse.
“We know a few that continued and did as many of the 30 bays in 30 days fundraiser discreetly skinny-dipping where possible,” said organiser Peter Leigh.
“This year we are repeating the event at the same place and time but a week later due to the tides.”
This year’s event will be taking place at 17:00 on 18 September at Pembroke Bay, and people are asked to meet beforehand at 16:30.
“Our charities this year are Pink Ladies, Autism Guernsey and The British Heart Foundation,” said Mr Leigh.
You can find out more information ONLINE.