Spathi, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Spathi, South Aegean, Greece, is known for its beautiful beaches and proximity to the ancient ruins of Delos. The best time to travel to Spathi, Greece, is from June to September, with average air temperatures around 75-85°F (24-29°C) and water temperatures around 73-79°F (23-26°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!