Dun Laoghaire RNLI brought a swimmer to safety yesterday after they got into difficulty at the 40 Foot.
The crew was alerted by the Irish Coast guard just after 2 o'clock that a casualty was struggling to swim ashore, being pulled by the current and was drifting around the back of the 40 Foot and out of sight.
Their swimming partner had made it to shore and called 999.
The swimmer was rescued and brought to safety, and was described as cold and tired with cuts and scrapes from the rocks, but did not require medical attention.
The RNLI says while weather conditions were calm, sea temperatures were considerably lower than recent days.
A statement from the RNLI says: "Dun Laoghaire RNLI rescued a swimmer who got into difficulty at The Forty Foot bathing area yesterday (Sunday 15 October).
"The volunteer crew were requested to assist the swimmer after she got caught in a current and was drifting close to a rocky outcrop.
"The crew were alerted at 2.05pm by the Irish Coast Guard that a casualty was struggling to swim ashore, being pulled by the current and drifting around the back of the 40 Foot and out of sight.
"Their swimming partner had made it ashore moments earlier to call 999 and ask for the Coast Guard. The inshore lifeboat Joval was launched within five minutes, helmed by Andrew Sykes, with volunteer crew members Gary Hayes and Ailbhe Smith aboard, and made best speed to reach the scene by 2.14pm.
"Weather conditions were calm at the time with rippled water, however, sea temperatures were considerably lower than those recently.
"Some quick-thinking bystanders threw a life ring to a group of kayakers in the water who threw the ring onwards to the swimmer to keep her afloat until the lifeboat arrived.
"The crew rescued the swimmer from the sea and brought her ashore to safety and into the care of waiting Dun Laoghaire Coast Guard unit, where, although very cold and tired with minor cuts and scrapes from the rocks, she did not require medical attention."
Dun Laoghaire RNLI helm Andrew Sykes says: "It was fortunate that the life ring was in position on shore, and we would like to wish the casualty well and commend her partner and the bystanders for raising the alarm and responding safely.
"We would encourage swimmers to never go alone and to always make sure that their activity is monitored by a colleague. Consider wearing a bright-colored swim cap and carrying a mobile phone in a waterproof pouch.
"Conditions can change in a very short time, so we all need to be aware of potential risks and be well prepared before entering the water. Should you get into difficulty or see someone else in trouble, call 999 or 112 and ask for the Coast Guard."