The yacht, a Beneteau 50-ft sloop called Emmjay, caught fire at about 5pm.
Phuket Marine Chief Wiwat Chitchertwong confirmed that all nine on board were safely recovered by a passing fishing boat.
Chief Wiwat noted that he had been informed that the fire started after the yacht was hit by lightning.
No other details were released, though it was reported that Vice Governor Thanyawat Chanpinit has been assigned to follow upon the police investigation into the cause of the fire.
The Emmjay is openly listed as available for bareboat charter. A crew list provided to The Phuket News showed no Thai nationals on board at the time of yesterday’s fire.
The incident comes as Phuket officials and their superiors in Bangkok continue their campaign to convince Chinese tourists that Phuket is a safe holiday destination.
The campaign began after a huge plunge in bookings by Chinese tourists after the Phoenix tour disaster on July5 killed 47 Chinese tourists.