Keen swimmer Fred, who swims every Monday morning at Carluke Leisure Centre, was surprised by around 25 friends with a birthday cake, balloons and banners.
Friend Morag Jack said: “It was a fantastic morning and Fred was surprised by the wee celebration we had.
“Fred is a very quiet man but he is so well liked by everyone. It amazing that he is still swimming after all these years.
“A few people go together on a Monday morning and it’s good for all of them.”