Boston Bay, Jamaica offers 1 beach perfect for sunbathing, surfing, swimming, and more. Boston Bay is known for its beautiful beaches and excellent surfing conditions. The best time to travel to Boston Bay, Jamaica, is from December to April, when the average air temperature is around 82°F (28°C) and the water temperature is approximately 81°F (27°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!