Perth Amboy, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Perth Amboy is known for its historic waterfront, including the Perth Amboy Ferry Slip and Proprietary House. The best time to travel to Perth Amboy, United States, is during late spring to early fall (May to September) when the average air temperature ranges from 60°F to 80°F and the water temperature is around 60°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!