Possidi, Greece offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Possidi, East Macedonia and Thrace, Greece, is known for its beautiful Possidi Cape and the historic Possidi Lighthouse. The best time to travel to Possidi, Greece, is from June to September, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 24-26°C (75-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!