Runaway Bay, Jamaica offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Runaway Bay is known for its beautiful beaches and the Green Grotto Caves. The best time to travel to Runaway Bay, Jamaica, is from November to mid-December, 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!