Port Washington, United States offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Port Washington is known for its picturesque Port Washington Marina and the historic 1860 Light Station. The best time to travel to Port Washington, 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 is approximately 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!