The Rio Alva is one of Portugal's lesser-known river gems. Rising in the Serra da Estrela above 1,400 metres, it flows for some 110 kilometres through the Beira Interior before joining the Mondego — and along the way, between the municipalities of Oliveira do Hospital and Arganil, it offers some of the most beautiful river beaches in the country.
What makes the Rio Alva special
The river's almost implausible emerald-green colour comes from the purity of the water and the granite riverbed. The surrounding landscape of granite boulders, schist villages and dense riparian woodland gives each beach a character quite different from the Atlantic coast. Water quality is consistently excellent — several beaches hold Blue Flag status — and the scenery is dramatic without being inaccessible.
The key beaches
Vila Cova de Alva is the showpiece: emerald pools, a Roman bridge, and a well-organised beach with lifeguard cover in summer. Coja — the "Princess of the Alva" — has a small dam that creates a calm mirror of water, perfect for families. Fragas de São Simão is a geological spectacle of giant granite boulders framing crystal-clear pools on the Rio Alge tributary. Boeiro, near Oliveira do Hospital, is the quietest of the group — ideal for those seeking solitude with Serra da Estrela views.
Practical information
The official bathing season runs from June to September. Water temperatures are refreshingly cool (18–22°C) even in peak summer. All beaches are signposted from the national roads in the area. Combine the trip with a meal in one of the nearby schist villages — the local cuisine (roast kid, chanfana lamb stew) is outstanding.
