Guaymas, Mexico offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Guaymas is known for its beautiful beaches, the historic San Fernando Church, and the annual Carnival of Guaymas. The best time to travel to Guaymas, Mexico, is from November to April, with average air temperatures ranging from 68°F to 82°F and water temperatures around 70°F to 75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!