San Giovanni, Italy offers 2 beaches perfect for sunbathing, surfing, swimming, and more. San Giovanni, Sardinia, Italy, is known for its beautiful beaches and the nearby archaeological site of Tharros. The best time to travel to San Giovanni, Italy, is from May to September, with average air temperatures around 70-85°F (21-29°C) and water temperatures ranging from 70-77°F (21-25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!