BOAT-COMPARATOR Guide

Gaeta, Sperlonga and Ponza: the Secret Gulf Between Rome and Naples

Less crowded than the Amalfi Coast, the Gulf of Gaeta opens onto Sperlonga, Circeo and the Pontine Islands: real distances, best season and tips for renting a boat out of Lazio.

Between Rome and Naples, the Gulf of Gaeta remains one of the best-kept secrets of the Italian coastline: less crowded than the Amalfi Coast, just over an hour's drive from the capital, it still packs a 13th-century fortress, an imperial grotto and volcanic islands within day-trip reach — with noticeably fewer boats at anchor in high season than around Capri or Positano. Here's how to plan it.

Gaeta, a port beneath the ramparts

The marina at Gaeta sits right below the walls of the Angevin-Aragonese castle that overlooks the old town: the lower section, built under the House of Anjou, and the upper section, fortified on the orders of Charles V, together form one of the best-preserved defensive complexes in Lazio. Modern marina facilities — berths, fuel, showers, wifi — make it a comfortable base for exploring the gulf.

Montagna Spaccata, the cleft that overlooks the town

Just above the harbour, a deep rocky cleft splits the cliff of Mount Orlando into three parts: local legend has it that it opened at the moment of Christ's death, as recounted in the Gospel of Matthew. The Sanctuary of the Trinity, founded in 930 by Benedictine monks on the ruins of a Roman villa, still clings to the split rock today — a curiosity worth the short walk from the port, before or after the day on the water.

Sperlonga and Tiberius's grotto, a short hop away

A handful of miles south, Sperlonga is worth the detour for its sea cave alone: Emperor Tiberius had a villa with a nymphaeum built there, and the monumental sculptures found on site — now displayed in the archaeological museum next door — rank among the finest pieces of ancient Roman sculpture. The coast alternates limestone cliffs and small white-sand beaches, easily covered between two anchorages in a single day. The name Sperlonga is thought to come from the Latin spelunca, meaning cave — a reminder, as you arrive by sea, of what made the site famous long before beach tourism did.

Circeo, a stop before the open sea

Halfway to the islands, the Circeo headland closes off the gulf to the north: this isolated limestone outcrop, linked since antiquity to the sorceress Circe from the Odyssey, also marks the entrance to a protected national park. A logical stop to break up the crossing before heading offshore, or a day trip in its own right if the Pontine Islands feel too far.

Ponza, Palmarola and Ventotene: the Pontine Islands

Count on just over 35 nautical miles between Gaeta and Ponza, the busiest of the Pontine Islands — a crossing for experienced crews only, best done in calm seas with a following wind, in the spirit of our guide to Mediterranean winds. Palmarola, uninhabited and ringed with tuff cliffs shaped by erosion, often rounds out the trip for faster boats. Ventotene, further out still, is better suited to a multi-day stay than a single day trip: beyond its still partly visible Roman-era harbour, the island owes some of its fame to the manifesto written in 1941 by anti-fascist prisoners held there, regarded as one of the founding texts of the idea of European unity.

A direct link from Rome

Unlike most Italian destinations in this guide, Gaeta is an easy drive from Rome: just over an hour via the A1 motorway and the SS7, without going through Naples. That makes it a realistic base for a boating weekend out of the capital, without the crowds of the Amalfi Coast or the prices that come with them.

When to sail

From May to early October the Tyrrhenian Sea here is generally mild, with a crowd peak in July-August on the Sperlonga-Circeo stretch alone; the more exposed Pontine Islands are best attempted from June to September, when calm-sea weather windows are most reliable.

In practice

A RIB or a motorboat is plenty for a day trip to Sperlonga and Circeo; heading to Ponza, you'll want a boat capable of handling open water and, without offshore experience, a skipper who knows the crossing. Plan somewhere sheltered to anchor for a swim stop too — the coves around Circeo and Sperlonga suit a lunch on board well — and budget for fuel over the distance covered (our guide to fuel budget helps estimate it). Above all, check your booking's weather-cancellation policy before aiming for the islands: a day of rough seas can shut the crossing down overnight, as covered in our guide to weather guarantees. Further south, the Bay of Naples and its islands offer a comparable playground, already well covered on Boat-Comparator in our guide to Naples, Ischia and Procida by boat.

Compare the platforms now →

Also worth reading

• How much does it cost to rent a boat in 2026? Real prices
• License-Free Boat Rental in France: Rules, Prices & Where to Book
• Renting with or without a skipper: how to choose