Las Arenitas, Mexico offers 1 beach perfect for sunbathing, surfing, swimming, and more. Las Arenitas is known for its proximity to the Culiacan River and the nearby Las Arenitas Ecological Park. The best time to travel to Las Arenitas, Mexico, is between November and April, with average air temperatures around 75°F (24°C) and water temperatures near 77°F (25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!