La Guardia, Spain offers 8 beaches perfect for sunbathing, surfing, swimming, and more. La Guardia, Galicia, Spain, is known for the Monte de Santa Trega, an archaeological site with ancient Celtic ruins and panoramic views. The best time to travel to La Guardia, Spain, is from May to September, with average air temperatures around 70-80°F (21-27°C) and water temperatures around 68-75°F (20-24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!