Water Valley, Jamaica offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Water Valley, Saint Mary, Jamaica, is known for the picturesque Blue Hole mineral spring and its lush tropical surroundings. The best time to travel to Water Valley, Jamaica, is from December to April, with average air temperatures around 75-85°F (24-29°C) and water temperatures near 80°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!