São Félix da Marinha is a Portuguese town and a parish in the municipality of Vila Nova de Gaia, in the district of Porto, in Northern Portugal. The population in 2011 was 12,706, in an area of 7.93 km2.It includes Praia da Granja, a seaside resort beach famed by Sophia de Mello Breyner Andresen, a Portuguese writer and poet who spent part of her childhood there. The local beach and the sea provided inspiration for the maritime themes on her writings.