Leonidio, Greece offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Thach Hai is known for Thach Hai Beach, a serene coastal destination in Ha Tinh, Vietnam. The best time to travel to Leonidio, Greece, is from May to September, with average air temperatures ranging from 25-30°C (77-86°F) and water temperatures around 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!