Salt River, Jamaica offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Salt River, Clarendon, Jamaica, is known for the Salt River Mineral Spa. The best time to travel to Salt River, 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!