Spetses, Greece offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Spetses is known for its historic Poseidonion Grand Hotel, the Armata Festival, and the Anargyrios and Korgialenios School of Spetses. The best time to travel to Spetses, Greece, is from May to September, with average air temperatures ranging from 25-30°C (77-86°F) and water temperatures around 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!