Green Island, Jamaica offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Green Island, Hanover, Jamaica, is known for its proximity to the famous tourist destination of Negril with its stunning Seven Mile Beach. The best time to travel to Green Island, Jamaica, is from December to April, with average air temperatures around 77-86°F (25-30°C) and water temperatures about 79-82°F (26-28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!