Blue Cave Dubrovnik: A Complete Visitor's Guide
2 September 2024 · 2 min read · Group Boat Tours Dubrovnik · Last updated: 18 April 2026
Ask a dozen visitors where the “Blue Cave near Dubrovnik” is and you’ll get a dozen answers — partly because there’s a more famous Blue Cave on the island of Biševo, hours up the coast. The one you can actually reach on a half-day from Dubrovnik is on Koločep, the closest of the Elaphiti Islands. This guide clears up the confusion and tells you how to make the most of it.
Where the Blue Cave actually is
The Blue Cave we visit sits on the southern edge of Koločep, about 20 minutes by boat from Dubrovnik’s harbour. It’s a low sea cave where sunlight bounces off the white seabed and back up through the water, turning the whole cave a luminous blue. Because the entrance is right at the waterline, the only way in is by boat and then a short swim — there’s no road, no path and no entrance gate.
How to get there
The simplest way is a Blue Cave & Elaphiti Islands group boat tour, which pairs the cave with two or three swim stops around the islands. If you’d rather take your time, the full-day Elaphiti tour adds Šipan and a lunch stop. Either way you’ll leave from Gruž harbour or the Old Town Port.
The best time to go
Two things make or break a cave visit: light and crowds.
- For the brightest blue, go mid-morning to early afternoon, when the sun is high enough to flood the seabed with light.
- For fewer boats, go early. The first departures often have the cave almost to themselves before the day-trip flotillas arrive around midday.
- For calm water, late spring and early autumn tend to be settled, though July and August are reliably warm for swimming.
What it’s like inside
You’ll moor just outside, grab a mask, and swim in through the low mouth of the cave. Inside it’s cool, quiet and impossibly blue — bring an underwater camera if you have one, because photos genuinely don’t oversell it. Non-swimmers can stay close to the boat with a float; the skipper keeps everyone in sight.
What to bring
Keep it simple: swimsuit under your clothes, a towel, reef-safe sun cream, water and a waterproof phone pouch. We provide snorkelling gear and drinking water on board. For a full checklist, see our guide to what to pack for a Dubrovnik boat tour.
Ready to see it for yourself?
The Blue Cave is the highlight of our most popular trip. Check availability and book your seats, or message us if you’re not sure which departure suits your day.
Sources & useful links
Frequently asked questions
Is the Blue Cave near Dubrovnik free to visit?
There's no entrance fee for the Blue Cave on Koločep itself — you simply pay for the boat that gets you there and back. It's only reachable from the water, so a group boat tour is the usual (and cheapest) way to go.
How long do you spend in the Blue Cave?
On our tours you get around 20–30 minutes in and around the cave to snorkel and swim, plus more swim stops nearby. Going early means fewer boats and clearer, calmer water inside.