Hope Bay, Jamaica offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Hope Bay, Portland, Jamaica, is known for its proximity to the Blue Mountains and the beautiful Frenchman's Cove. The best time to travel to Hope Bay, Jamaica, is from December to April, with average air temperatures around 77-86°F (25-30°C) and water temperatures near 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!