Santa Marina, Spain offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Santa Marina, Galicia, Spain, is known for the Camino de Santiago pilgrimage route. The best time to travel to Santa Marina, Spain, is in late spring or early fall when the average air temperature is around 70°F (21°C) and the water temperature is approximately 66°F (19°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!