The Prime Minister and his wife Samantha soaked up the sun in Ibiza on Sunday after flying out to the island on Saturday.
Mr Cameron has been accompanied by a small team of key staff and is being kept up to date over developments in the murder of Drummer Lee Rigby.
Looking relaxed and casual, the couple sipped coffee against a picturesque beachside backdrop.
Mr Cameron, in a dark shirt and open-toed sandals, and his wife, who was sporting a teal-coloured sun dress, were left undisturbed by nearby customers, including fellow Brits.
A No10 spokesman said: "The PM is on holiday with his family for the week. As always, whilst away, he remains in charge, and has office support with him."