Treasure Beach, Jamaica offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Treasure Beach is known for its laid-back atmosphere, beautiful beaches, and the annual Calabash International Literary Festival. The best time to travel to Treasure Beach, 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!