Dexter, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dexter is known for its proximity to the International UFO Museum and Research Center in nearby Roswell. The best time to travel to Dexter, United States, is in late spring (May), when the average air temperature is around 65°F (18°C) and water temperature is approximately 55°F (13°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!