Community Links: Manhasset Chamber of Commerce Feel free to learn more about the Manhasset Area from the local chamber of commerce website for Manhasset. Port Washington Chamber of Commerce Feel free to learn more about the Port Washington Area from the local chamber of commerce website for Port Washington. TopHelpful Information: History of Long Island Learn more about Long Island from articles written by Newsday. TopWeather: Local Manhasset Weather Check out the latest weather forecast for the local area.