Santa Eularia des Riu, Spain offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Santa Eularia des Riu is known for its beautiful beaches like Cala Llonga and the historic Puig de Missa. The best time to travel to Santa Eularia des Riu, Spain, is from May to September, with average air temperatures around 75°F (24°C) and water temperatures around 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!