Cienega del Sur, Mexico offers 1 beach perfect for sunbathing, surfing, swimming, and more. Cienega del Sur is known for its proximity to the Los Tuxtlas Biosphere Reserve, a significant ecological and tourist attraction. The best time to travel to Cienega del Sur, 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!