El Duin, Mexico offers 1 beach perfect for sunbathing, surfing, swimming, and more. El Duin is known for its proximity to the Monarch Butterfly Biosphere Reserve, a UNESCO World Heritage site. The best time to travel to El Duin, Mexico, is between November and 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!