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Blue Grotto
Photo: Wikimedia Commons
poi · IT

Blue Grotto

Getting around: On the island of Capri, reached by ferry or hydrofoil from Naples or Sorrento (about 40-80 minutes) to Capri or Marina Grande, then a boat trip around the island to the grotto entrance, or a bus/taxi plus rowboat from land.
Hours: Entry depends on sea conditions and tide; typically accessible roughly 9am-5pm in season, closed entirely when the sea is too rough for safe entry, which happens fairly often.

The Blue Grotto (Grotta Azzurra) is a sea cave on Capri famous for the intense blue glow that fills the water, caused by sunlight refracting through an underwater opening and a small entrance passage. Visitors transfer from a larger boat into a small rowboat to pass through the low, narrow entrance, lying flat as the boatman pulls the boat in by a chain.

Access is entirely weather- and tide-dependent; the cave's entrance is barely a meter high, so even moderate swell can close it for the day, and visitors sometimes arrive only to find it inaccessible.

Because of this unpredictability, and given that reaching it requires a boat trip from Naples or Sorrento to Capri plus a further boat transfer, it's worth checking current conditions before setting out, and treating a viewing as a possibility rather than a guarantee.

Blue Grotto FAQs

Why might the Blue Grotto be closed when I visit?

Its entrance is very low, so anything beyond calm seas or high tide can make it too dangerous or physically impossible to enter, closing it for the day.

How do I get inside the grotto?

You transfer from a larger boat into a small rowboat and lie flat as the boatman pulls you through the low entrance by a chain.

How long does the actual visit inside take?

Just a few minutes inside the cave itself, though the overall excursion including boat transfers takes much longer.

Can I visit independently or do I need a tour?

You can reach it independently via Capri and a local boat, though many visitors book an organized boat tour from Naples or Sorrento that includes it.

What causes the blue color?

Sunlight enters through a small underwater opening and refracts through the water, creating the vivid blue glow inside the cave.

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