Vathy, Greece offers 37 beaches perfect for sunbathing, surfing, swimming, and more. Vathy, Ionian Islands, Greece, is known for the Archaeological Museum of Vathy and the picturesque harbor of Vathy Bay. The best time to travel to Vathy, Greece, is from May to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!