Although Port Jefferson Harbor was mainly industrial in the middle 20th Century, a revitalization effort in the 1980s brought back the old fishing village charm. Today, Port Jefferson Harbor is a great stop-over for travelers by sea or land, offering great restaurants, interesting shops, a popular hotel and conference center, and quick access to the harbor.

Port Jefferson Harbor has a humid continental climate with warm summers that can get hot and humid and cold winters that can be severely cold. Temperatures in Port Jefferson Harbor range from an average high of 24°C (75°F) in July and August to an average low of 0°C (32°F) in January and February. Rainfall is about 10 centimeters (four inches) each month except February, when in falls to 7.6 centimeters (three inches). Snow comes to Port Jefferson Harbor from November through April and is heaviest in January (almost 18 centimeters or seven inches). Humidity levels range from 70% in December and January to 80% in September and October.

In the heart of Port Jefferson Harbor's downtown is a beautiful and historic residential village. Built with transient boaters in mind, Port Jefferson Harbor's restaurants, boutiques, art galleries, antique shops are within an easy walk of the docks. Port Jefferson Harbor is well protected, and boaters can drop anchor anywhere in the deep-water harbor outside the channel.

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