Sinnariolo, Italy offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sinnariolo, Sardinia, Italy, is known for its proximity to the stunning beaches of the Costa Smeralda and the archaeological site of Nuraghe La Prisgiona. The best time to travel to Sinnariolo, Italy, is from May to September, with average air temperatures ranging from 70-85°F (21-29°C) and water temperatures around 70-75°F (21-24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!