Iliya, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Iliya, Central Greece, Greece, is known for its proximity to the archaeological site of Olympia, the birthplace of the ancient Olympic Games. The best time to travel to Iliya, Greece, is from May to September, with average air temperatures ranging from 75°F to 85°F and water temperatures from 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!