Plettenberg Bay, South Africa offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Tuy An is known for Ganh Da Dia, a unique geological formation of hexagonal basalt columns. The best time to visit Plettenberg Bay, South Africa, is from November to March, with average air temperatures around 25°C (77°F) and water temperatures around 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!