Delos, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Delos is known for its UNESCO World Heritage Site, the Archaeological Site of Delos. The best time to travel to Delos, Greece, is from May to October, with average air temperatures ranging from 70°F to 85°F and water temperatures from 70°F to 77°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!