Alentejo Coast

The Alentejo coast is Portugal's least-developed Atlantic shore — broad dune systems, fish-farming lagoons, and the port of Sines backed by one of Europe's largest oil refineries. The Vicentina Coast Natural Park protects most of the stretch between Comporta and Sagres, limiting coastal development and preserving habitats. Tidal character is semidiurnal Atlantic; mean spring range around Sines and Porto Covo is 2.8 to 3.2 metres — enough to shift beach access considerably across the day. The low-tide sand at beaches like Praia do Malhão and Praia de Odeceixe runs wide and flat, and the surf that arrives unimpeded from the North Atlantic makes this coast popular with longboarders and beginners outside the Algarve crowds. Fish from the cold-upwelling Canarian Current feeds the local seafood market in Sines — the lagosta (spiny lobster) and salmonete (red mullet) available here reflect a cold, productive Atlantic fishery. Porto Covo village, perched on low cliffs above a sheltered rock-bowl cove, is the classic accommodation base for the park section. For authoritative Portuguese tide data, consult Instituto Hidrográfico.