Ag Dimitrios, Greece offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Ag Dimitrios, South Aegean, Greece, is known for its proximity to the stunning beaches of the island of Tinos and the famous Church of Panagia Evangelistria. The best time to travel to Ag Dimitrios, Greece, is from late May to early October, with average air temperatures ranging from 75-85°F (24-29°C) and water temperatures around 73-79°F (23-26°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!