Italy's largest Gulf island is famous for its volcanic thermal springs and spa resorts. Spend a day at Poseidon Thermal Gardens (13 pools in different temperatures) or Negombo Gardens, explore the Aragonese Castle, and enjoy fresher seafood than Capri at lower prices.
Ischia is the largest island in the Gulf of Naples, about 45 km from Naples in Campania, Italy, and famous for the volcanic thermal springs that have drawn spa-goers since Roman times. Ferries and hydrofoils run from Naples Molo Beverello and the slower car ferry from Calata Porta di Massa, taking roughly 45-90 minutes depending on the vessel (around €15-18 return); boats also connect from Pozzuoli and seasonally from Sorrento. The signature day out is the thermal park: Poseidon Thermal Gardens on the Bay of Citara near Forio has around 20 pools at varying temperatures, a sauna and a private beach (entry roughly €30-35), while Negombo Gardens at Lacco Ameno blends thermal pools with botanical landscaping. A relaxed one-day arc takes a morning ferry, a local bus or taxi to the chosen thermal park for several hours of soaking and lunch at the on-site restaurant, then an afternoon stop in town. Beyond the spas, the Aragonese Castle, reached by a stone causeway from Ischia Ponte, is the island's great monument, a fortified islet of churches, terraces and dungeons with superb sea views. Forio's Mortella Gardens, the village of Sant'Angelo and the long Maronti beach reward a return visit. Ischia's seafood is generally fresher and cheaper than Capri's, with the island dish coniglio all'ischitana (rabbit) a local speciality alongside grilled fish in the harbour trattorias. The island circuit bus (CS/CD lines) is the cheap way to get around. The best window is May-June and September, when the sea and thermal waters are warm but the summer crowds have eased; the thermal parks typically run from spring into autumn and close in winter. A swimsuit, towel, sandals and sun protection are the day's essentials, and an early boat maximises pool time before the afternoon return.
Highlights
- Poseidon Thermal Gardens (13 volcanic pools)
- Aragonese Castle
- Authentic seafood
- Less crowded than Capri
Tips for visiting
- Take a hydrofoil from Naples Molo Beverello for speed, or the cheaper car ferry from Calata Porta di Massa if time allows.
- Choose one thermal park for the day; Poseidon Gardens near Forio is the largest, Negombo at Lacco Ameno the most scenic.
- Use the island circuit buses (CS and CD lines) to get between the port, the spas and town cheaply.
- Pack a swimsuit, towel and sandals; the thermal parks charge for sun-lounger and locker hire.
- Pair a morning at the spa with an afternoon at the Aragonese Castle near Ischia Ponte.
- Go in late spring or September for warm water without the August crush; many parks close in winter.
When to visit
Late spring (May-June) and September bring warm sea and thermal waters with fewer crowds; take an early ferry to maximise pool time before the afternoon return.
Accessibility
The larger thermal parks such as Poseidon and Negombo offer some accessible pools, ramps and facilities, though terraced terrain and steps limit full access in places. The Aragonese Castle involves stairs and steep ramps and is difficult for wheelchair users.
Frequently asked questions
How long is the ferry from Naples to Ischia?
Hydrofoils take about 45 minutes and car ferries up to 90 minutes, costing roughly €15-18 return. Boats leave from Molo Beverello and Calata Porta di Massa.
Which thermal park is best for a day visit?
Poseidon Thermal Gardens near Forio has around 20 pools and a private beach, while Negombo at Lacco Ameno mixes thermal pools with gardens. One park easily fills a relaxed day.
Is Ischia cheaper than Capri?
Generally yes. Ischia tends to have lower prices and fresher, less expensive seafood, and feels less crowded than glamorous Capri.
Are the thermal parks open all year?
No. The major thermal gardens typically operate from spring into autumn and close over winter, so late spring to September is the reliable window.