The annual new year's day event at South Queensferry attracted people from near and far, with participants from countries such as Australia, France and Germany joining locals for a dip.
Many particpants chose to don fancy dress for the dook, while others braved the water in swimming costumes.
A firm fixture in Scotland's calendar for more than 25 years, the Loony Dook is part of this year's Edinburgh's Hogmanay celebrations.
It has grown in popularity in recent years, with all 1,100 places sold out this year.
The dook has raised tens of thousands of pounds for charities across the UK, including the South Queensferry lifeboat.
A spokeswoman for Edinburgh's Hogmanay, said: "It was another great Loony Dook, with lots of extremely colourful fancy dress.
"We had people in their onesies, hula girls, and even a man all wrapped up in bubble wrap - who was probably the least cold.
"We even had a marriage proposal. One man popped the question to his partner after he'd been in for the dip...and she said yes.
"As usual the RNLI (Royal National Lifeboat Institution) were terrific."
The event also kicks of Scotland's Year of Homecoming, a year-long programme of events alongside the Commonwealth Games and Ryder Cup.
It includes highlights such as a ''whisky month'' in spring, the Edinburgh festivals and events to mark the 700th anniversary of the Battle of Bannockburn.