Os Rainas, Spain offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Os Rainas is known for its proximity to the Camino de Santiago pilgrimage route. The best time to travel to Os Rainas, Spain, is in late spring (May to June) when the average air temperature is around 68°F (20°C) and the water temperature is approximately 64°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!