Tomatlan, Mexico offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Tomatlan is known for its proximity to the lush Sierra de Vallejo Biosphere Reserve and the beautiful beaches of Costa Alegre. The best time to travel to Tomatlan, 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!