Phthiotis, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Phthiotis is known for its thermal springs and historical sites, including the ancient city of Thermopylae. The best time to travel to Phthiotis, Greece, is from May to September, with average air temperatures ranging from 20°C to 30°C and water temperatures around 22°C to 26°C. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!