Pachena, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Pachena, South Aegean, Greece, is known for its proximity to the ancient archaeological site of Akrotiri. The best time to travel to Pachena, Greece, is from late May to early October, with average air temperatures ranging from 75°F to 85°F and water temperatures around 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!