Lackawaxen, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Lackawaxen is known for the Zane Grey Museum and the Roebling's Delaware Aqueduct. The best time to travel to Lackawaxen, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature in the Delaware River is approximately 70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!