The 52-year-old Portuguese woman was evacuated from the beach on a lifeboat belonging to the Ferragudo coastguard.
The tourist had been dropped off at the beach by a leisure boat before being taken ill.
She was evacuated from the cove and taken to Benagil beach where an INEM ambulance was awaiting her arrival, and transported her to Portimão Hospital.
Last week the Algarve’s sea-rescue entities were kept busy with a series of interventions involving ailing tourists from boats and beaches.
On Wednesday a pregnant woman had to be rescued by the Ferragudo coastguard from a tourist boat off the Algarve coast after becoming unwell. The 32-year-old woman who is four months pregnant was rescued from the boat Alegria while near Benagil beach in Lagoa after she fainted.
Last Tuesday evening, the Maritime Police intervened in another incident involving a tourist boat when a British tourist fell overboard in Vilamoura.
And on Monday a French woman on holiday in Portugal had to be evacuated by the coastguard from the renowned Marinha Beach in Lagoa after injuring her knee. She was taken from the beach by boat to the Ferragudo coastguard station.
The incident happened on the busy beach at around lunchtime on Monday, which was a bank holiday.
The 38-year-old woman was met in Ferragudo by an ambulance which transported her to Portimão hospital.
Maritime police and Lagoa firefighters were also at the beach to provide assistance.
The woman is understood to have fractured her kneecap.