I am told the Seals have pups at this time of year and that the pups are quite playful with some swimmers and the parents become anxious as a result. This can result in “nips” from the parents. I have no actual experience of this myself, nor do I know anyone who has. The nips could allegedly penetrate/damage a wetsuit, but again I have not seen it. I did once see a man from a group of swimmers with binoculars on Killiney Beach keeping an eye out for Seals, but that was a couple of years ago.
It might be sensible to see what the other bathers are doing when you get down there, especially if they don’t have wetsuits on 😮 !
Phil.