Selby On The Bay, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Selby On The Bay, Maryland, United States, is known for its proximity to the Chesapeake Bay and its scenic waterfront views. The best time to travel to Selby On The Bay, United States, is during late spring to early fall (May to September) when the average air temperature ranges from 65°F to 85°F and the water temperature is around 70°F to 80°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!