Giglio Porto is located on the eastern side of the island of Giglio, where it serves as the island’s only port. As the first settlement visible to ferries arriving from Porto Santo Stefano, Giglio Porto was the island’s first civilian settlement during the Roman era.

Today, Giglio Porto is a small, very picturesque village, whose defining features are the small, colorful houses that stand close together in parallel rows along the entire hillside facing the sea, creating narrow alleys. Even inside the port, the water is incredibly clear.

Giglio Porto is protected by two outer breakwaters, called Molo Verde and Molo Rosso. At the heads of these two breakwaters, it is easy to spot two lighthouses: on the northern breakwater, facing almost due east, stands a green lighthouse with a range of 7 mg; on the eastern breakwater, which is angled and oriented along a north-south axis, the light—also with a light range of 7 mg—emits a bright red beam.

Within the port complex, there is a masonry pier reserved exclusively for scheduled ferries. The seabed is sandy, and its depth varies considerably: along the docks—with the exception of the ferry pier—the seabed is 1.5 meters deep; at the harbor entrance, however, it reaches a depth of 7–8 meters.

It is highly inadvisable to drop anchor inside the ports because of the many dead bodies and catenaries used for moorings.

The marina offers 196 berths (including 20 for transit) for boats up to 20 meters in length and with a maximum draft of 2.5 meters. However, the total number of available berths varies greatly from season to season; for example, during the summer, the port is very congested with ferry traffic and vessels in transit.

All moorings are managed by the Local Maritime Office. Within the harbor, mooring is available almost everywhere, with the exception of the rocky outcrop extending from the Levante pier and the pier reserved exclusively for ferry traffic. Vessels up to 15 meters in overall length are permitted to dock.

Under normal conditions, Giglio Porto is generally well protected from almost all winds; the predominant ones blow from the north, northeast and southeast.

A number of basic services are made available to boaters who moor at this port, such as garbage collection (by the municipality) and electricity at the dock or the use of toilets, bathrooms and showers.

There is also a gas station on the pier, roughly near the ferry terminal; its hours of operation vary depending on the season. Water refilling is possible but very limited, as the island receives only a limited amount of water from the mainland.

Other services offered are dock lighting, the presence of a slipway and private cranes, and the possibility of using a telephone booth.

Since Giglio Porto is predominantly considered a transit point, little recreational boating is assisted within the port.

There are nearby, safe anchorages located within the Gulf of Campese and in Cala delle Cannelle.