Messini, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Messini is known for the Ancient Messene archaeological site. The best time to travel to Messini, 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!