Giglio Porto is located on the eastern side of Giglio Island, of which it is the only port. The first visible settlement for ferries from Porto Santo Stefano, in Roman times Giglio Porto was the first civilian settlement on the island.

Today, Giglio Porto is a very quaint little town whose hallmarks are the small colorful houses that rise close to each other in parallel lines all along the slope facing the sea, creating narrow alleys. Even within the ports, the sea is characterized by incredible clarity.

Giglio Porto is protected by two breakwater piers, called Green Pier and Red Pier. At the head of these two piers it is easy to spot two lanterns: on the North Pier, almost oriented to the East, a green-light lantern with a luminous range of 7 mg stands out; on the East Pier, with an elbowed course and positioned on a North-South axis, the lantern, again with a luminous range of 7 mg, has a bright red light.

Within the harbor structure there is a masonry pier exclusively reserved for scheduled ferries. The seabed is sandy and its depth varies widely: along the quays, with the exception of the ferry pier, there is a seabed of 1.5 mt; at the mouth, however, this seabed reaches a depth of 7-8 mt.

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

The port provides 196 berths (including 20 for transit) for boats up to a maximum length of 20 meters and a maximum depth of 2.5 meters. The total availability of berths, however, varies greatly from season to season; for example, during the summer period the port is very congested with ferry and transit boat traffic.

The moorings present are all managed by the Local Maritime Office. Within the port it is possible to find moorings almost everywhere, with the exception of the reef from the Levante Pier and the pier exclusively reserved for ferry traffic. Berths are allowed for vessels up to 15 meters in overall length.

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 fuel station at the dock, approximately near the ferry dock; the opening hours of this station change depending on the season. Water supply is possible but very limited as the island receives 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.

Nearby and safe anchorages are located within the Campese Gulf and in Cannelle Cove.