Duncans Bay, Jamaica offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Duncans Bay is known for its proximity to the historic Good Hope Estate and the beautiful Silver Sands Beach. The best time to travel to Duncans Bay, Jamaica, is from December to April, with average air temperatures around 80°F (27°C) and water temperatures near 82°F (28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!