Praia de São Marcos is a 700-meter golden-sand beach in Peniche, Portugal, bathed by the Atlantic Ocean.
Known for its crystal-clear waters and proximity to the dramatic Cabo Carvoeiro peninsula, it offers a mix of relaxed sunbathing and water sports opportunities.
The beach has a strong local vibe, with visitors praising its spacious sand area and accessibility to Peniche's historic town center[1][2][5].