Nuevo Belen, Mexico offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Nuevo Belen, Chiapas, Mexico, is known for its proximity to the Montes Azules Biosphere Reserve. The best time to travel to Nuevo Belen, Mexico, is from November to April, with average air temperatures around 75°F (24°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!