The volunteer lifeboat crew was alerted shortly before 8pm following a request by Belfast Coastguard that a vessel with two onboard had broken down in Dundrum Bay.
The inshore lifeboat, helmed by Niall McMurray with crew members Declan Barry and Karl Rooney onboard, launched within minutes to the incident. Weather conditions at the time were described as good with a flat, calm sea.
Once on scene, the lifeboat crew observed that the 17ft leisure craft had experienced engine failure. The crew checked that the two on board were safe and well before establishing a tow line and proceeding to bring the vessel safely back to Dundrum.
Speaking following the callout, McMurray said: "Thankfully both people were not injured and we were able to help bring them safely back to shore.
"We would encourage anyone planning to go in or near water especially during this hot weather spell to enjoy themselves but to always respect the water.
"Check your boat and equipment before every trip, carry a means of communication should you get into any difficulty and always wear a lifejacket."