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Glowing blue water inside the Montenegro Blue Cave near Kotor
Croatia · Montenegro · Capri · 2026 comparison

Blue Cave Croatia vs Montenegro vs Capri: Which Should You Actually Visit?

All three caves glow for the same reason: sunlight passes through a submerged opening and reflects from a pale limestone seabed. The travel experience is completely different. Montenegro is the practical, swimmable choice from Kotor; Croatia is the famous island-hopping cave; Capri is the historic icon with the shortest visit.

Montenegro advantage the only one of the three where swimming inside is the normal experience

Montenegro: swim inside Croatia & Capri: no swimming
Compare All Three Book Montenegro
  • MontenegroBest if swimming matters
  • CroatiaMost famous blue glow
  • CapriMost iconic, shortest visit
  • 11am-1pmBest glow window
  • Sunny dayEssential for all three
The short verdict

If You Are Already Near Kotor, Montenegro Wins

If you are in Kotor, Tivat, Budva, Herceg Novi or arriving by cruise ship, the Montenegro Blue Cave is the easiest and best-value option. It is a 40-70 minute speedboat ride from Kotor, it is usually part of a 3-hour route with Our Lady of the Rocks, the submarine tunnels and Mamula Island, and it is the only famous Blue Cave where swimming inside is the point.

Croatia's Blue Cave on Bisevo is spectacular but logistically heavier from Split, usually expensive as a full-day island tour, and swimming has been banned for years. Capri's Blue Grotto is historic and atmospheric, but the actual cave visit is often only a few minutes in a rowboat after a long queue.

Relevant Montenegro option

Kotor Blue Cave, Our Lady of the Rocks, Submarine Tunnels & Mamula Tour

The project tour data is strongest for Kotor-departing Montenegro Blue Cave tours. This 3-hour option fits the comparison because it is the practical choice for visitors near Kotor who want a swimmable Blue Cave rather than a brief no-swim cave visit.

Pоwered by GetYourGuide
Three-way comparison

Croatia vs Montenegro vs Capri Blue Cave

FactorMontenegroCroatiaCapri
Nearest hubKotor / Herceg NoviSplit / Hvar / VisCapri / Naples / Sorrento
Typical route3-hour Kotor speedboat tourFull-day island-hopping tour or ferry via VisFerry to Capri, then rowboat transfer
Swimming insideYes, sea conditions permittingNo, swimming is bannedNo during opening hours
Time at caveUsually 15-30 minutesOften 10-15 minutesOften about 5 minutes inside
Best forSwimmers, Kotor visitors and cruise passengersSplit/Hvar island-hopping itinerariesCapri first-timers who want the classic rowboat moment
Main drawbackWeather and summer boat trafficLong travel day, high cost, no swimmingQueues, closures, layered costs, very short visit

Bottom line: choose Montenegro if you want to swim, Croatia if you are already island-hopping from Split or Hvar, and Capri only if the Blue Grotto is a specific bucket-list stop.

Montenegro Blue Cave

Why Montenegro Is the Best All-Round Blue Cave

Montenegro's Blue Cave, also called Plava Spilja, sits on the open-Adriatic side of the Lustica Peninsula, outside the Bay of Kotor. From Kotor, the boat ride is part of the experience: you pass Perast, Our Lady of the Rocks, the Verige Strait, Mamula Island and the Yugoslav submarine tunnels before or after the cave swim.

Since May 2025, motorized boats no longer enter the cave. Operators anchor outside and guests swim in with life jackets, which keeps the cave quieter and cleaner. This makes Montenegro different from Croatia and Capri: instead of viewing the glow from a licensed shuttle boat or tiny rowboat, you can be in the water.

Croatia and Capri

When Croatia or Capri Makes More Sense

Croatia: Modra Spilja, Bisevo

Best for Split and Hvar Island-Hopping

Croatia's Blue Cave is often the most intense blue visually, but it is not a quick cave stop from the mainland. From Split, it usually belongs to a long full-day tour through Vis, Bisevo, Stiniva and Hvar. Choose it if you want a Dalmatian island day and the no-swim rule does not bother you.

Italy: Grotta Azzurra, Capri

Best for Capri History and Icon Status

Capri's Blue Grotto is the most famous name, with the rowboat entrance, low cave mouth and Roman history. It is also the most vulnerable to closures and queues, and the time inside can feel very short for the price. Treat it as a Capri add-on, not the whole reason for the day. For costs, timing and closure planning, read the full Blue Grotto Capri guide.

Other experiences you might enjoy

Blue Cave and Coastal Cave Tours to Compare

If you are choosing between Montenegro's Blue Cave from Kotor, Croatia's Blue Cave on Bisevo Island, and Capri's Blue Grotto near Naples and Sorrento, also compare Bay of Kotor boat tours, Our Lady of the Rocks, Mamula Island, submarine tunnel tours, Hvar island-hopping and Capri boat tours.

Common questions

Blue Cave Comparison FAQ

Which Blue Cave is best: Croatia, Montenegro or Capri?
There is no single best Blue Cave for everyone. Capri's Blue Grotto is the most famous and is known for its intense blue light, Croatia's Blue Cave on Biševo is a spectacular natural attraction often combined with an island-hopping trip, while Montenegro's Blue Cave is a great choice for visitors staying in Kotor or elsewhere around the Bay of Kotor. Your best option usually depends on where you are travelling and what kind of boat trip you want.
What is the difference between the Blue Cave in Croatia, Montenegro and Capri?
The three caves offer quite different experiences. Capri's Blue Grotto is entered in small rowing boats through a very low entrance and is famous for its luminous blue interior. Croatia's Blue Cave is located on Biševo Island and is usually visited as part of a longer speedboat or island-hopping tour. Montenegro's Blue Cave is on the Luštica Peninsula near the entrance to the Bay of Kotor and is commonly visited on boat tours from Kotor, Herceg Novi and nearby resorts.
Which Blue Cave has the bluest water?
Capri's Blue Grotto is particularly famous for its dramatic electric-blue glow, created when sunlight enters through an underwater opening. Croatia's Blue Cave can also produce an intense blue and silvery light effect in favourable conditions. Montenegro's Blue Cave is known for clear turquoise and deep-blue water, although the appearance of all three caves varies with sunlight, weather and sea conditions.
Can you swim in the Blue Caves in Croatia, Montenegro and Capri?
Swimming rules are one of the biggest differences between the three experiences. Swimming is not permitted during standard visits to Capri's Blue Grotto or Croatia's Blue Cave on Biševo. At Montenegro's Blue Cave, swimming is commonly included on many boat tours when weather, sea conditions and local restrictions allow it.
Which Blue Cave is best for a boat tour?
Croatia and Montenegro are particularly good choices if you want the cave visit to be part of a larger boat trip. Croatian tours often combine the Blue Cave with islands, coves and swimming stops around Vis and the Adriatic. Montenegro tours can combine the Blue Cave with the Bay of Kotor, Our Lady of the Rocks, Mamula Island and former submarine tunnels. Capri's Blue Grotto is more focused on the famous cave experience itself, although it can be included in a boat tour around Capri.
Which Blue Cave is the least crowded?
Crowds vary considerably by season and time of day. Capri's Blue Grotto can have significant queues during the summer because visitors transfer into small rowing boats to enter. Croatia's Blue Cave is also extremely popular during peak summer months and access is carefully managed. Montenegro's Blue Cave can be busy in high season but generally offers a less formal cave-entry experience.
Is the Blue Cave in Montenegro worth visiting?
Yes, particularly if you are already visiting Kotor or the Montenegrin coast. The Blue Cave is easily combined with a boat trip through the Bay of Kotor, and many tours add attractions such as Our Lady of the Rocks, Mamula Island and the submarine tunnels. It is a good option for travellers who want both sightseeing and time on the water.
Is Croatia's Blue Cave worth visiting?
Croatia's Blue Cave is worth considering if you are visiting Split, Hvar, Vis or the surrounding islands and want a full-day Adriatic boat experience. The cave itself is usually only one part of the trip, so the experience is best suited to travellers who also want island scenery, boat travel and additional stops.
Is Capri's Blue Grotto worth visiting?
Capri's Blue Grotto can be worth visiting for its unusual glowing blue light and iconic status, but the experience inside the cave is relatively short and waits can be long during busy periods. It is most appealing to visitors who consider the grotto one of their must-see sights on Capri and are comfortable with the possibility of queues or weather-related closures.
Which Blue Cave is best for families?
The best choice depends on the children's ages and how comfortable they are on boats. Montenegro can be convenient for families staying around Kotor because Blue Cave excursions are available in different lengths. Croatia often involves longer speedboat journeys, while entering Capri's Blue Grotto requires transferring into a small rowing boat and lying low as the boat passes through the cave entrance.
Can Blue Cave tours be cancelled because of bad weather?
Yes. Access to all three Blue Caves depends on sea and weather conditions. Strong winds, waves or unsafe conditions can prevent boats from entering the caves, and conditions may change during the day. Travellers should check the cancellation policy when booking and avoid planning an entire trip around guaranteed cave access.
Which Blue Cave should I visit if I can only choose one?
Choose Capri if seeing the world's most famous Blue Grotto is the priority. Choose Croatia if you want the cave to be part of a larger Adriatic island-hopping adventure. Choose Montenegro if you are visiting Kotor or the Bay of Kotor and want an easy-to-combine boat excursion with coastal scenery, historic sights and possible swimming stops.
Choose the swimmable cave

Ready to Visit Montenegro's Blue Cave from Kotor?

If you are already near Kotor, the 3-hour Blue Cave speedboat tour gives you the cave swim plus Our Lady of the Rocks, Mamula Island and the submarine tunnels in one route.

  • Only famous Blue Cave in this comparison where swimming inside is normal
  • Kotor waterfront departure, useful for cruise passengers and Old Town stays
  • Free cancellation up to 24 hours before on the main GetYourGuide options
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