The event is said to date back to 1987 when three locals jokingly suggested a January 1 dip as a cure for Hogmanay hangovers. From small beginnings, the event grew in size and popularity during the 1990s, was added to the official Edinburgh Hogmanay publicity material and even broadcast live by the BBC at the millennium.
The event usually attracts around 1,000 people, many in fancy dress, to raise money for charity. And some people come from abroad to take part in the swim.
The official Loony Dook was cancelled for new year 2021 and 2022 because of Covid and the 2023 event was not included in the official Hogmanay programme, but dedicated Dookers went ahead anyway.
Scroll through these pictures to enjoy Loony Dooks past – without having to take the plunge.
21. Bunny girls take the plunge
These girls dressed as bunny girls before taking the plunge for the annual Loony Dook in 2008. Photo: Ian Rutherford
22. Ready for the plunge
A colourful line-up of Loony Dookers prepare to take the plunge on January 1, 2018 | Johnston Press
23. Gym'll fix it
Members of Grangemouth gym Girlcode Box were among the revellers taking part in the Loony Dook at South Queensferry on January 1, 2024. Photo: Lisa Ferguson
24. Spectator sport
It's not jut the hardy souls taking a dip ho turn up for the Loony Dook - it's a spectator sport too, as can be seen in this picture of the 2020, with crowds out in force to watch the fun. | Ian Georgeson