Eldorado, Mexico offers 1 beach perfect for sunbathing, surfing, swimming, and more. Eldorado, Sinaloa, Mexico, is known for its proximity to the scenic beaches of Altata Bay and the cultural richness of Culiacan. The best time to travel to Eldorado, Mexico, is from November to April, with average air temperatures around 75°F (24°C) and water temperatures near 72°F (22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!