Blue Cave Dubrovnik: Complete Guide 2026 — How to Visit, What to Expect, Prices
The Blue Cave near Dubrovnik (locally called Modra Špilja) is a natural sea cave on Koločep Island where sunlight creates an otherworldly blue glow. This guide covers everything from a local skipper's perspective — including the things other websites won't tell you.
What is the Blue Cave Dubrovnik?
The Blue Cave Dubrovnik (Modra Špilja in Croatian) is a natural sea cave on the eastern coast of Koločep Island, one of the three main Elafiti Islands. Located just 7 km — or a 15-20 minute speedboat ride — from Dubrovnik Old Town Port, it's the most accessible sea cave experience in Croatia.
What makes it special: sunlight enters the cave through a submerged opening in the rock, refracts off the white limestone seabed, and illuminates the entire chamber with a luminous blue glow. The effect is strongest between 10:00 and 14:00 when the sun is directly overhead.
Unlike the more famous Blue Cave near Hvar (on Biševo island), the Dubrovnik Blue Cave allows swimming inside. You enter through a narrow opening, swim about 10-20 metres, and find yourself floating in a chamber lit entirely by blue refracted light. It's one of the most photographed natural phenomena on the Croatian coast.
Blue Cave Dubrovnik vs Blue Cave Hvar (Biševo) — Key Differences
This is the most common question we get. Tourists see "Blue Cave Croatia" and assume there's only one. There are actually several, but the two most visited are on Koločep (near Dubrovnik) and Biševo (near Hvar). Here's the honest comparison from someone who's seen both:
| Factor | Dubrovnik (Koločep) | Hvar (Biševo) |
|---|---|---|
| Distance from city | 7 km (20 min) | 55 km (4-5 hours) |
| Can you swim inside? | Yes — you swim 10-20m in | No — rowboat only, no swimming |
| Time inside the cave | 30-45 minutes | 5 minutes (rowboat in/out) |
| Crowds | Small groups (max 7) | Very crowded, long queues |
| Tour price | €50 | €80-120 |
| Total tour duration | 4 hours (half-day) | 10-12 hours (full day) |
The Hvar cave is more "famous" because it's been promoted longer. But in terms of actual experience — being able to swim inside, spending real time there, smaller crowds — the Dubrovnik Blue Cave is better for most visitors. Especially if you're already in Dubrovnik and don't want to waste an entire day traveling.
How to Get to the Blue Cave from Dubrovnik
The only way to visit the Blue Cave is by boat. There's no public ferry that stops at the cave itself — the Jadrolinija ferry goes to Koločep village, which is on the opposite side of the island from the cave.
Your options:
- 01Small-group speedboat tour (recommended) — Departs from Dubrovnik, takes you directly to the cave, includes Green Caves and Šunj Beach. €50/person. This is what we operate.
- 02Private boat charter — Rent a boat with a skipper for your group. More flexible but more expensive (€300-500 for the boat). Good for larger groups.
- 03Kayak — Technically possible from Dubrovnik but it's 7km of open water. Only for experienced sea kayakers. Not recommended for most visitors.
Best Time to Visit the Blue Cave Dubrovnik
Best months: May, June, September. Warm weather (24-28°C), warm sea (21-24°C), fewer crowds than July-August. The blue glow is visible all season.
Best time of day: 10:00-14:00 when sunlight is directly overhead and the blue refraction is strongest. Our morning tour (departing 09:30) arrives at peak glow time — this is deliberate.
Season: April through October. The cave is accessible year-round but tours only operate when sea conditions and weather allow safe swimming.
What to Expect Inside the Blue Cave
You approach the cave entrance by boat. The opening is about 2 metres wide and 1.5 metres high — just large enough to swim through. You enter the water with a mask (we provide all gear) and swim approximately 15 metres through the entrance passage.
Once inside, the cave opens into a chamber roughly 20 metres long and 10 metres wide. The ceiling is about 4 metres high. And the water — the entire volume of water inside the cave — glows blue. Not a faint tint. Vivid, electric blue. Your skin looks blue. Other swimmers look blue. Cameras struggle to capture how intense it actually is.
You can float, swim, dive under (the bottom is about 4-5 metres deep), take photos, or just float on your back and stare at the light. Most groups spend 30-45 minutes inside. There's no rush.
Blue Cave Dubrovnik Price — What Should You Pay?
In 2026, prices for Blue Cave tours from Dubrovnik range from €50 to €85 per person for group tours, depending on the operator.
Our price is €50 per person — the lowest in Dubrovnik for a licensed operator with proper boats. This includes the speedboat, drinks (beer, soft drinks, water), snorkeling gear, life jackets, and a licensed local skipper. There are no hidden extras.
Why are some operators more expensive? Because they sell through platforms like GetYourGuide or Viator which charge 20-30% commission. The operator needs to inflate the price to cover that. When you book direct with us, you skip the middleman.
What's Included in Our Blue Cave Tour
- ✓ Speedboat transfer (Quicksilver 675 Open Active)
- ✓ Blue Cave swim (30-45 min inside)
- ✓ Three Green Caves with snorkeling
- ✓ Šunj Beach free time (45 min)
- ✓ All drinks (beer, soft drinks, water)
- ✓ Snorkeling masks, fins, life jackets
- ✓ Licensed local skipper
- ✓ Free cancellation (24h notice)
Tips from Your Skipper
- → Wear your swimsuit under your clothes — you'll be in the water within 20 minutes of departure.
- → Waterproof phone case is essential — the light inside the cave is incredible for photos.
- → Bring reef-safe sunscreen — you'll need it at Šunj Beach.
- → Non-swimmers are welcome. We provide float noodles and life jackets. You can float through the entrance.
- → Book the morning tour (09:30) for the strongest blue glow.
Ready to visit the Blue Cave?
€50/person · Max 7 guests · Daily departures · Free cancellation
Book your Blue Cave tour →