Alvor, Prainha & Três Irmãos

Where is it?

Alvor is in the municipality of Portimão. Praia dos Três Irmãos (“three brothers”) takes its name from three pierced rock formations; east of it, Prainha is a string of small coves below the cliffs, reached by stairs. Behind Alvor lies the Ria de Alvor estuary, a protected wetland.

How to visit

By boat: cave and coast trips leave from the Alvor estuary (Ria de Alvor) and from Portimão, visiting the caves between Alvor and Praia do Vau; whether boats go inside depends on sea and tide. Combined boat-and-kayak tours also run from Alvor. On foot: at low tide you can walk through rock tunnels from Três Irmãos towards Prainha. Departure towns: Alvor and Portimão.

Tides matter

At high tide the passages between the coves are cut off. If you plan to walk through the tunnels, check the Portimão tide table (IPMA) and go within about two hours either side of low tide, and turn back early if the tide is rising.

Safety & rules

Do not sit or sunbathe right under the cliffs — rockfalls happen on this coast. Wear the life jacket provided on boats and kayaks, and only paddle into caves with a guide in calm water.

Families & accessibility

Prainha is reached by steps, and the tunnels need some scrambling, so they are not suitable for wheelchairs or strollers. A boat trip from Alvor or Portimão is the easiest way to see the caves; check each operator’s accessibility and age notes (unknown where not published).

Photo credits (Wikimedia Commons)