Long Cay, Belize offers 1 beach perfect for sunbathing, surfing, swimming, and more. Long Cay, Belize, is known for its proximity to the Belize Barrier Reef, a UNESCO World Heritage Site popular for snorkeling and diving. The best time to travel to Long Cay, Belize, is from late November to mid-April, with average air temperatures around 75-85°F and water temperatures near 80°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!