Organisers are hoping for 400 dippers
Today's New Year's Day dip in Peel will be the 40th anniversary of the event.
The tradition began when, on New Year's Eve in 1982, a group of four friends decided to dip the next day, raising £50 for the MS Society.
Fast forward 40 years, and a total of £250,000 has been raised for Manx charities.
This year's event is in aid of Peel RNLI, MS Society IOM and Hospice.
It's at midday.
Jacqui Green has organised the dip for 20 years:
Glenfaba and Peel MHK expects Tynwald censure
Kate Lord-Brennan says it's after posts about telegraph poles
Chief Minister rubbishes wind farm suggestion
Cannan responds to comments made by his former treasury minister
Man found dead in Island plantation
Police not treating death as suspicious
Manx Care 'reviewing' findings of landmark UK maternity reports
Inquiries are 'substantial and present important learning opportunities for all maternity services'