Two tourists, aged 47 and 11, were on Thursday rescued by a coast guard vessel off a beach in Thessaloniki, in northern Greece, after being swept away by the currents and strong wind on an air mattress.
Coast guard also rescued a third man, 42, who had entered the sea to help the two.
Reports said they were all in good health.
Last month, a Russian tourist was found safe after spending 22 hours out at sea on a floating mattress in Crete. She was spotted by an EU border agency Frontex aircraft.