The Loony Dook (or should that be Douk?) at Portobello is a much more haphazard thing than the much larger and more organised event along at South Queensferry that gets much more media attention. They are both recent institutions compared to the event in Broughty Ferry, Dundee that has been going since the 1890s!
There are no official organisers in Portobello and it's usually a case of people spreading the word when they will be heading down. This year there were several dooks along the beach although the largest one was at the foot of Bath Street at 1pm