Praia da Pedra da Nau

Leiria, Portugal

Remote 1km beach backed by Mata Nacional do Pedrogao dune forest. No facilities, frequented by fishermen.

Alcobaca, Portugal

Blue Flag beach in Pataias parish with wide sand backed by pine forest. Non-concessioned.

Aveiro, Portugal

Praia das Dunas de Sao Jacinto lies within the Reserva Natural das Dunas de Sao Jacinto, a protected 996-hectare nature reserve on a narrow sandy peninsula separating the northern arm of the Ria de Aveiro from the Atlantic Ocean. This 3.8-kilometre stretch of pristine, almost wild beach is one of the most spectacular and unspoiled on Portugal's entire coast. Dogs are permitted on the non-concessioned sections year-round under Portuguese law, making it a popular choice for dog owners in the Aveiro and central Portugal region. The beach offers crystal-clear waters and a dramatic backdrop of stabilised sand dunes covered in marram grass, seaside eryngo, and maritime pine forest planted in the late 19th century to prevent sand erosion. Access adds to the sense of adventure: a ferry crossing from Forte da Barra to Sao Jacinto is followed by a 1.5-kilometre walk west through the reserve to reach the beach. The reserve is primarily dedicated to protecting marine birds, including several migratory species, so dogs must be kept on leash to minimise disturbance to wildlife. This is an entirely natural beach with zero facilities — no lifeguards, no showers, no restaurants, and no shade. Bring all supplies including water, food, sun protection, and waste bags. The Atlantic waves here can be powerful, attracting surfers and bodyboarders, so supervise dogs carefully in the water. For a calmer swimming option, the Ria de Aveiro lagoon on the eastern side offers sheltered waters.