Guimbonan, Greece offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Guimbonan, South Aegean, Greece, is known for its stunning beaches, the ancient Temple of Aegon, and the annual Guimbonan Cultural Festival. The best time to travel to Guimbonan, Greece, is from May to September, with average air temperatures around 75°F (24°C) and water temperatures near 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!