Heroica Guaymas, Mexico offers 1 beach perfect for sunbathing, surfing, swimming, and more. Heroica Guaymas is known for its beautiful beaches like San Carlos, the historic San Fernando Church, and the annual Carnival of Guaymas. The best time to travel to Heroica Guaymas, Mexico, is from November to April, when the average air temperature is around 70-80°F (21-27°C) and the water temperature is approximately 70-75°F (21-24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!