The 38-foot vessel, with two people on board, encountered engine trouble off the Penarth coast in the early hours of Saturday, August 22.
RNLI Penarth volunteers were called out at 12.39am and found the vessel unable to move in the shipping channel after a 30-hour journey.
The boat was deemed as a hazard to navigation, and considering the rising tide and “significant swell” it was towed into Cardiff Bay but the the Atlantic 85 lifeboat.
A spokesperson for RNLI Penarth said: “Another early hours shout for our volunteer crew, who were paged at 00.39 this morning to a 38ft sailing vessel with engine issues.
“The two crew on board were finishing a 30 hour voyage and unable to make way in the shipping channel off Penarth foreshore.
“The vessel presented a hazard to navigation and with a rising tide and significant swell was taken under tow by our Atlantic 85 into Cardiff Bay.
“Our lifeboat was refuelled and ready for service, and our crew able to return home to bed, by 03:25”.
