Pessegueiro Island (Portuguese: Ilha do Pessegueiro), literally island of the Peachtree, is a small island/islet located along the southwest coast of the civil parish of Porto Covo in the municipality of Sines. The island and the adjacent coast are part of Southwest Alentejo and Vicentine Coast Natural Park, but Pessegueiro island is also notable for the 15th-16th century fort located at its centre and Roman ruins along the coast.