Santa Gadea, Spain offers 1 beach perfect for sunbathing, surfing, swimming, and more. Santa Gadea, Asturias, Spain, is known for the Santa Gadea Monastery and its picturesque natural surroundings. The best time to travel to Santa Gadea, Spain, is in late spring or early fall when the average air temperature is around 20°C (68°F) and water temperature is approximately 18°C (64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!