Whether you drive into Port Jefferson or come by the ferry, walking is the best way to get around and to see Port Jefferson. If you come by car, park behind the stores on the west side of Main Street and forget your car for the rest of the day.
Main Street is the commercial part of Port Jefferson. Here you will find restaurants, coffee shops, the Gap, and many other modern stores interspersed with a few speciality shops.
On East Main Street you will find the heart of Old Port Jefferson. Here is the heart of the historic area with antique and craft shops, book store, library, and many speciality shops.
There are a number of crosswalks in Port Jefferson, however they are poorly marked and difficult for drivers to see so be careful crossing, especially Main Street at East Main.
One can get to Port Jefferson by car, train or boat. If you plan on going into the Village during the summer, especially on a Friday or Saturday night, be prepared to drive around for up to and yes sometimes more than 30 minutes to find a parking space. Watch the parking signs. If the sign says 'parking for residents only', they mean it and you will geta ticket if you park there.
Once you park your car just walk around. Everything is within walking distance.
Keep in mind when driving in the Village...they do have cross walks...town law states that drivers MUST stop for anyone crossing the street in the cross walk. This is probably one of the few places I know of that the cars usually do stop. Again, there are cops waiting to ticket the driver that doesnt stop.