Why the Blue Grotto
Why the Blue Grotto
The most magical sea cave in Italy
The Blue Grotto — Grotta Azzurra — is Capri's signature wonder: a low sea cave you enter by lying back in a small rowboat, where sunlight passing through a submerged opening lights the whole cavern an unreal, glowing blue and makes the water seem lit from within. It's brief, a little chaotic, and genuinely unforgettable.
A whole coastline of caves and cliffs
The grotto is the headline, but the joy is the boat ride around the island. Capri's coast is a run of dramatic limestone cliffs, hidden coves and other sea caves — the White and Green grottoes — culminating in the Faraglioni, the three towering rock stacks that are the island's emblem, which the boat glides right between.
Swim in impossibly clear water
Between the sights, small-group boat tours pull into sheltered coves for swimming and snorkelling in some of the clearest water in the Mediterranean, often with drinks, snacks and a taste of Capri's famous limoncello on board. It's the way the island is best seen — from the sea, at your own pace.
The route, cove by cove
The route, cove by cove
A Capri boat tour loops the island, weaving between its caves and cliffs. Routes and order vary with the sea and the operator, but a day usually takes in these.
- Set off
Out from the coast
You board at Sorrento (or Capri's Marina Grande) and cruise across toward the island, the cliffs rising ahead. The skipper sets the day's plan around the sea conditions, which decide whether and when the Blue Grotto can be entered.
- Around Capri
Caves and the Faraglioni
The boat follows the coastline past sea caves, natural arches and secluded beaches, sailing up to — and through the gap in — the Faraglioni stacks, the island's iconic rock towers, with time to photograph the famous views.
- The grotto
Into the Blue Grotto
Sea permitting, you transfer to a small rowboat at the grotto entrance and are rowed inside, ducking low through the tiny opening, to see the water glow electric blue. This is run by the local grotto boatmen and usually carries a separate entry fee.
- Swim stop
A dip in a hidden cove
Away from the crowds, the boat anchors in a sheltered cove for a swim and snorkel in crystal water. Many tours serve drinks, snacks and limoncello here — the relaxed heart of the day.
- Return
Back across the bay
After a final look at the coast the boat cruises back, usually with the sun lower and the cliffs golden. Half-day tours return by afternoon; full-day options add free time in Capri town.
The grotto & how it works
The grotto & how it works
The Blue Grotto is wonderful but weather-dependent and often misunderstood. Here's how it actually works, so you book with open eyes.
Why the water glows blue
The cave has a second, larger opening below the waterline. Sunlight enters through it, and as it passes through the seawater the red light is filtered out, leaving an intense blue that fills the cavern and lights the water from beneath. It's brightest around midday when the sun is high.
It can close — and often does
Entry is through a very low opening, so the grotto only opens when the sea is calm and the tide low enough. In wind, swell or high tide it closes, sometimes at short notice, and no tour can guarantee entry. This is the single most important thing to understand before you book.
How entry works
You can't take the tour boat inside. At the entrance you transfer to a small rowboat operated by the local grotto boatmen, who row a few people in at a time through the gap. There's usually a separate entrance fee for this, often not included in the boat-tour price, and a wait in peak season.
Where tours start
Boat tours run from Sorrento and from Capri's Marina Grande, and some from Naples or Positano. From Sorrento it's a short crossing. The listing states the departure point and whether the grotto entry fee and hotel pickup are included.
Capri and the Blue Grotto, in pictures
Capri and the Blue Grotto, in pictures
Electric-blue water, limestone cliffs and the Faraglioni stacks the tour sails between.
Tour options & what's included
Tour options & what's included
| Option | What it includes | Good to know |
|---|---|---|
| Small-group boat tour | A shared boat around Capri with caves, Faraglioni and swim stops | The best mix of sights, swimming and value; the Blue Grotto if the sea allows |
| Boat tour + Blue Grotto entry | The above with the grotto rowboat entry fee included | Convenient — but entry still depends on the sea being calm |
| Private boat tour | Your own boat and skipper, tailored to your pace | Pricier but flexible; ideal for families or a special day |
| From Sorrento / Naples / Positano | The same-style tour departing from different towns | Pick the departure nearest your base; crossing times vary |
Ways to book a Capri boat tour
Find a Capri & Blue Grotto tour for your dates
Each option below books through GetYourGuide with live availability, and the final price shows in your own currency before you pay.
Planning your Capri day
Planning your Capri day
Accept that the grotto may close
The Blue Grotto only opens in calm, low-tide conditions and can shut at short notice — no tour can promise entry. Book the boat tour for the whole Capri experience (caves, Faraglioni, swimming), treat the grotto as a wonderful bonus, and you'll never be disappointed. Free cancellation protects you if the sea forecast looks rough.
Go in the morning, and early season if you can
The grotto is brightest around midday and calmest in the morning before the wind builds, and queues there are long in peak summer. May, June and September are lovely and less crowded than July and August. Whenever you go, an earlier start means smaller crowds on the water and at the grotto.
Know the grotto fee and the transfer
Entering the Blue Grotto means transferring to a local rowboat and usually paying a separate entrance fee, often not included in the tour price — check the listing. Bring some cash for this and for tips. The rowboat entry is quick and a little chaotic; that's part of the experience.
Bring for a day on the water
Pack a swimsuit and towel for the swim stops, sun protection and a hat, a light layer for the breeze, and a waterproof phone case for the boat. Soft-soled or bare feet are best on deck. If you're prone to seasickness, take something beforehand, as the open crossings can be choppy.
Booking flexibility
The GetYourGuide listing offers free cancellation up to 24 hours before and often reserve-now-pay-later, so you can hold a spot and adjust around the weather — especially useful given the grotto's sensitivity to the sea. The exact terms and inclusions are shown before you confirm.
Planning a Blue Grotto trip
Planning a Blue Grotto trip
FAQ
The Blue Grotto & Capri — your questions
What is the Blue Grotto?
The Blue Grotto (Grotta Azzurra) is a sea cave on the coast of Capri, in Italy's Bay of Naples. Sunlight enters through a large opening below the waterline, and as it passes through the seawater it lights the whole cavern an intense, glowing blue and makes the water appear lit from within. You enter by lying back in a small rowboat and passing through a very low opening — a brief but magical experience.
Can I be sure the Blue Grotto will be open?
No — and this is the key thing to know. The grotto's entrance is very low, so it only opens when the sea is calm and the tide low. In wind, swell or high tide it closes, sometimes at short notice, and no tour can guarantee entry. Book the boat tour for the full Capri experience and treat the grotto as a bonus; free cancellation helps if the forecast looks rough.
How do you actually get inside the grotto?
You can't enter on the tour boat. At the grotto entrance you transfer to a small rowboat operated by the local Capri grotto boatmen, who row a few passengers at a time in through the low opening. There's usually a separate entrance fee for this, often not included in the boat-tour price, and in summer there can be a wait. Bring some cash for the fee and tips.
What else does a Capri boat tour include?
Plenty — which is why it's worth booking even if the grotto is closed. Tours cruise the island's dramatic coastline past sea caves, natural arches and the iconic Faraglioni rock stacks, and stop in sheltered coves for swimming and snorkelling in beautifully clear water, often with drinks, snacks and limoncello aboard. Some full-day options add free time in Capri town.
When is the best time to go?
Late spring and early autumn (May, June, September) offer warm seas and lighter crowds than mid-summer. Whatever the month, mornings are usually calmer and less busy on the water, and the grotto is brightest around midday when the sun is high. Earlier starts also mean shorter queues at the grotto if it's open.
What should I bring?
A swimsuit and towel for the swim stops, sun protection and a hat, a light layer for the sea breeze, a waterproof phone case, and some cash for the grotto entry fee and tips. Soft or bare feet suit the deck. If you get seasick, take something beforehand, as the open crossings can be choppy.
Can I book with free cancellation?
Yes. The GetYourGuide listing offers free cancellation up to 24 hours before your tour and often a reserve-now-pay-later option, so you can hold a spot and adjust around the weather — particularly helpful given how much the Blue Grotto depends on calm seas. The exact terms are shown on the listing before you confirm.
Worried the Blue Grotto might be closed, or unsure which tour?
Leave your email and roughly when you're travelling — we'll send a short rundown of how the Blue Grotto works, why and when it closes, how the grotto entry fee works, and which Capri boat tours are worth booking.