Rianxo, Spain offers 36 beaches perfect for sunbathing, surfing, swimming, and more. Rianxo is known for its beautiful beaches and traditional Galician charm. The best time to travel to Rianxo, Spain, is during late spring to early autumn (May to September), when the average air temperature ranges from 18°C to 25°C (64°F to 77°F) and the water temperature is around 17°C to 21°C (63°F to 70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!