Sharks were spotted in the sea, mixing with Santa, reindeer - and even a turkey.
Here are some of Brian Murfield's pictures from the event.
5. Boxing Day dip
A large crowd watches the action. Photo: Brian Murfield
6. Boxing Day dip
Having a splashing time! Photo: Brian Murfield
7. Boxing Day dip
St George was among the hardy dippers. Photo: Brian Murfield