A total of 2,505 women, aged from their late teens to mid-80s, took over a secluded beach in Co Wicklow in Ireland at the weekend for the charity record bid.
Lucia Sinigagliesi, the Guinness World Records official that adjudicated the naked swim, said that 2,505 women spent five minutes in the chilling sea to set the new world record. Reportedly, the sea temperature was 12 degree Celsius when the women took the dips.
The swim has been an annual event since it was started by Dubliner Dee Featherstone in 2013 - just weeks after her own mastectomy. The events have raised thousands of euro.
All money raised goes towards Aoibheann's Pink Tie, the national children's cancer charity which supports the families of children diagnosed with cancer.
"There are a lot of women undertaking this who have been through cancer and of course loads of people who have been affected by it".
Deirdre Betson, of Dunboyne, Ireland, said the experience had been exhilarating.
The effort was able to break the existing Guinness World Record, which had actually been set in 2015 in Perth, Australia, when 786 people bared all. "It was awesome. I have never been naked in front of anybody before, except my husband, and it was brilliant and bracing", she said. "It was great craic", she said after coming out of the water. "So proud to have been a part of it", she wrote, adding, "aren't women just unbelievable".