Rinia, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rinia, South Aegean, Greece, is known for its ancient ruins and proximity to the UNESCO World Heritage site of Delos. The best time to travel to Rinia, Greece, is from late May to early October, with average air temperatures ranging from 75°F to 85°F and water temperatures from 72°F to 78°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!