Maragnanu, Italy offers 1 beach perfect for sunbathing, surfing, swimming, and more. Maragnanu is known for its proximity to the stunning beaches of Costa Smeralda and the archaeological site of Nuraghe La Prisgiona. The best time to travel to Maragnanu, Italy, is from May to September, with average air temperatures around 75°F (24°C) and water temperatures near 72°F (22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!