There's a call to tackle "extreme anti social behaviour" at the Forty Foot in Sandycove.
Locals have complained about drinking at the popular bathing spot, with claims a couple were also seen having sex on the roof of a shed near the beach.
People Before Profit TD Richard Boyd Barrett says a minority of people are ruining the amenity for everyone else and has asked the Justice Minister what he's doing to deal with the issue.
Charlie Flanagan has told the Dail he's asked the gardai for a report into the problem.
Local Fianna Fail councillor Cormac Devlin has heard the allegations of public sex acts and says action is definitely needed:
"There's been all sorts of reports of types of activity and lot of those have been reported to Gardai to tackle that type of behaviour because it's very unpleasant for families."