Constancia, Portugal offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Constancia is known for its picturesque riverside setting at the confluence of the Tagus and Zezere rivers, the Castle of Almourol, and its connection to the poet Luis de Camoes. The best time to travel to Constancia, Portugal, is in late spring (May to June) when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!