Ermoupoli, Greece offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Ermoupoli is known for its stunning neoclassical architecture, the Apollo Theater, and the Miaouli Square. The best time to travel to Ermoupoli, 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!