The Italian thermal island Capri's day-trippers never reach. When to go, where to stay across three budget tiers, the thermal-spa tradition, the seafood tavernas in Sant'Angelo, and how to get there.
Ischia sits in the Bay of Naples, the largest of the three islands in the bay (the other two being Capri and the much smaller Procida). It is volcanic — Mount Epomeo at its centre rose from the sea around 33,000 years ago and is still technically active — and the entire island is studded with 100+ hot springs, some natural pools and grotte you can walk to, some piped into the thermal spas that have defined the island's tourism since the 1950s.
For Northern European travellers, the case for Ischia is straightforward: it has roughly the same climate as Capri, the same Tyrrhenian sea, the same volcanic geology, but a quarter of Capri's prices and approximately zero day-trippers. Capri is a yacht-and-day-tripper economy; Ischia is a residential Italian holiday island where the same families have spent the same August week for sixty years.
The window is late April through October, with three meaningfully different sub-seasons.
Late April to mid-June is the calibrated sweet spot. Sea temperatures climb from 18°C in mid-April to 22°C by mid-June; air sits at 22–26°C with low humidity; the thermal spas are open and uncrowded; the wisteria blooms across the island in late April; the tourist economy is fully operational but not peaked. This is the window we'd book.
Mid-July to late August is Italian holiday season. Ischia is full but not in the Mykonos way — it's families of Italians who've been coming for generations. Temperatures hit 30–33°C with high humidity; sea reaches 26°C; restaurants take reservations seriously. The 2021 Cerberus heatwave that produced Europe's all-time 48.8°C record in Sicily didn't reach Ischia (the Bay of Naples is cooler than Sicilian interior), but August routinely produces 38°C+ days now.
Mid-September to late October is the second sweet spot. Sea still at 24–25°C through mid-October; air comfortable 22–27°C; prices drop 30–40% from August; the wine harvest happens in mid-October and the smaller wineries pour their previous year's Forastera and Biancolella at the cantine.
November through March is a different Ischia — most hotels close, the thermal spas mostly close, the island reverts to its residents. Mild but not a sun trip.
There is no airport. Ferries from Naples (Beverello and Calata di Massa) and Pozzuoli are the entry points. Three operators run the route:
From Naples airport (NAP), the easy connection is: Alibus to Beverello (€5, 25 min), then hydrofoil. Allow 2.5 hours airport-to-Ischia. If you're arriving on a late flight, stay one night in central Naples and catch the morning hydrofoil — it's cheaper than panicking onto the last 21:00 boat.
The island has a circular bus system (the EAVbus) that runs continuously and costs €1.30 per ride. Don't rent a car — the roads are narrow, parking is impossible in the villages, and the bus network is honestly fine. A scooter is more useful (€25–35/day from Ischia Porto operators).
Ischia is divided into six communes: Ischia (port), Casamicciola Terme, Lacco Ameno (the spa hub), Forio (the sunset side), Serrara Fontana, and Barano. The cliché advice is to stay in Forio for sunset views or Lacco Ameno for the thermal spas. Both clichés are right.
A 16th-century coastal tower converted into a 57-room adults-only hotel with private cliffside thermal pools cut into the volcanic rock. The thermal water itself is hot at the source. Adults-only; quiet; the kind of place where breakfast runs until noon and no one minds.
Around €520/night in shoulder season, €750+ in August. The Capri equivalent of this is €1,200/night.
A classic Italian grand hotel on the Lacco Ameno seafront — the family that built the Regina in the 1950s essentially built the modern Ischia tourism economy. Multiple thermal pools, a working spa, an operatic breakfast room, a clientele that runs from international guests to Italian families on their twentieth visit.
Around €320/night in shoulder season. The value-pick for Ischia — generous thermal-spa access at a price tier where Capri would give you a budget room.
A family-run hotel inside a working vineyard, 200m above the sea, 30 minutes' walk down to Sant'Angelo. The owners produce their own Biancolella and Forastera and serve it at dinner. Pool, sea view, the kind of place where the host insists you stay an extra hour at breakfast.
Around €110/night in shoulder season. About as cheap as Ischia gets without dropping to bed-and-breakfast level.
The thermal-spa tradition is Ischia's main differentiator. There are several scales.
Public parks charge €30–50 for a day and offer multiple pools at different temperatures, mud-bath rooms, and outdoor relaxation areas. The classics:
Free natural pools — Ischia's volcanic geology produces hot water that emerges into rock pools on several beaches. The best-known is Sorgeto Bay (south coast, accessible by a long stone staircase or by boat) — hot springs bubble directly into the sea, and the entire experience is genuinely free. Bring shoes; the rocks are sharp.
Private hotel thermal pools at Mezzatorre, Regina Isabella, and Miramare e Castello (Ischia Porto) are open to non-guests for €50–80/day if your accommodation doesn't have its own.
Ischia's food is Neapolitan with a thicker seafood emphasis. Coniglio all'ischitana (rabbit in tomato, white wine, herbs) is the iconic land dish — Ischia has more wild rabbits than Capri because the island is bigger. Spaghetti alle vongole, the simplest possible expression of seafood pasta, is at its best here.
The restaurants:
The wines are the under-appreciated part. Biancolella is the white grape that defines Ischia — fresh, mineral, a touch saline from the volcanic soil. Forastera is the heavier alternative; Per'e Palummo is the red. Visit Casa D'Ambra (in Forio) for tastings — the largest of the serious producers.
The picture-postcard fishing village on the south coast is genuinely worth a base. No cars are allowed in Sant'Angelo itself — you park or are dropped at the upper village and walk down. The piazza has six restaurants pressed against the harbour; the beach is reached by boat shuttle to nearby Maronti or by walking 15 minutes east. The thermal sources at Cavascura — a slot canyon you walk into for the natural mud rooms — are 10 minutes' walk from Maronti.
If you only have one beach day on Ischia, do Maronti. If you have three, add Citara on the west side (sunset) and San Montano on the north (calmest water).
Ischia Porto's symbol. A medieval castle on a rocky islet connected to the main island by a stone causeway. Open daily, €12 admission, two hours minimum to walk through. The view from the upper terrace is the iconic Ischia photograph — Castello in the foreground, Vesuvius on the horizon across the bay.
Book a flight to Naples, a hydrofoil to Ischia, and four nights at one of the three hotels above. Walk into Sant'Angelo for dinner one night, eat at Da Ciccio one night, spend one full day at Negombo or Poseidon, and leave one day for Sorgeto Bay's free hot springs and the Castello Aragonese. That's a week that costs roughly a third of the same week on Capri and produces materially better photographs of Vesuvius across the water.