Elefsina, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Elefsina is known for the Eleusinian Mysteries and the Archaeological Site of Eleusis. The best time to travel to Elefsina, Greece, is from May to September, when the average air temperature ranges from 75°F to 90°F and the water temperature is around 72°F to 79°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!