Four teenagers were rescued from the water at Strandhill Beach yesterday.
They were safely removed from the water by local suffers.
Members of the Sligo Bay RNLI volunteer crew responded to the incident.
The Coast Guard deployed a lifeboat at 2.28pm.
On arrival at the scene the Coast Guard advised the lifeboat crew that three swimmers had been rescued by local surfers but that a fourth person was missing.
The volunteer crew continued search the area until they were stood down by the Coast Guard, as the fourth swimmers had been successfully rescued and brought to shore.
An ambulance was also on the scene to assess all four swimmers.
David Mulcahy from Strandhill Surf School took part in the rescue operation.
