Riumar, Spain offers 1 beach perfect for sunbathing, surfing, swimming, and more. Riumar is known for the Ebro Delta Natural Park, a popular destination for birdwatching and nature tourism. The best time to travel to Riumar, Spain, is from June to September, when the average air temperature is around 75-85°F (24-29°C) and the water temperature is approximately 72-79°F (22-26°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!