Police were called to Kamala Beach at about 3pm after lifeguards recovered Australian tourists Ivan and Barbara Fistrovic from the strong surf.
Ivan, 75, recovered after receiving emergency first aid on the beach.
Barbara, 65, however, despite lifeguards’ attempts to revive her failed to regain consciousness and was pronounced dead later at Patong Hospital.
“We were told that the Australian couple went to swim where red flags were posted on the beach, and were caught by strong waves which dragged them away from the shore,” said Lt Col Somnuek Damkhaew of the Kamala Police.
“However, we are still investigating the incident,” Col Somnuek said.