Gardai in Killorglin were alerted to a sudden death last night.
The alarm was raised when a male was seen in water shortly after 10pm and gardai and other emergency services attended at the scene.
Gardai say they are not treating the death as suspicious.
The body, believed to be that of a male in his 60s, was taken from the scene.
It’s understood the man got into difficulty after swimming ashore from a fishing vessel, which had broken down.