Nascedios, Portugal offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Nascedios, Beja, Portugal, is known for the Alqueva Dam, the largest artificial lake in Western Europe. The best time to travel to Nascedios, Portugal, is from June to September, with average air temperatures around 75°F (24°C) and water temperatures near 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!