From Dubrovnik/Cavtat: Blue Cave, Sunj Beach Speed Boat Tour

Dubrovnik’s best view may be from the water, where the old city walls and red roofs rise above the Adriatic. This fast-moving cave-and-beach trip gives you that view, then takes you swimming through Koločep’s Blue Cave and Three Green Caves before a long stop at sandy Šunj Beach.

I like the easy mix of adventure and downtime, plus the fact that drinks and snorkeling gear are included. The main thing to consider is the sea itself: the ride can be bumpy, cave entrances can be busy, and you need basic swimming skills.

Key points to know

• The Blue Cave is reached by swimming: You enter through a narrow opening and float into the turquoise-lit interior.
• Three Green Caves offer different levels of adventure: Two are open and easy to explore, while one is a narrow swim-through passage.
• Šunj Beach gives you a proper break: You get about 90 minutes for swimming, sun, food, or a rented sunbed.
• The speedboat ride is part of the fun: Music, sea views, and quick transfers keep the outing lively.
• Guides vary by departure: Ivan, Rino, Mario, Dora, Peter, Leo, and others have led recent trips.
• Weather can change the route: The captain may switch the cave order or substitute a village stop in the cooler months.

Why this half-day boat trip works

At $71 per person, this is a fairly packed 4 to 5-hour outing. You are not paying only for a boat ride. The fare combines transport between several islands, a guide, snorkeling masks and snorkels, drinks, cave visits, swimming time, and a beach stop.

I see the value most clearly if you have only a few days in Dubrovnik. In one afternoon, you get an offshore view of the old city, three different cave experiences, a speedboat ride, and one of the area’s most famous sandy beaches.

The atmosphere is social rather than quiet. Guides often play music, pour drinks, and keep the mood light. Ivan is frequently praised for his friendly hosting, while Rino, Mario, Dora, Peter, and Leo have also led well-liked departures. The exact style depends on your boat and guide, but this is aimed at people who want a fun day on the water, not a silent nature cruise.

The tour is shared, not private. One recent departure had no more than 14 people, though group size and boat assignment can vary. That keeps the price below a private charter, but it also means you cannot control the music, timing, or number of other boats at each cave.

Leaving Dubrovnik and seeing the walls from sea level

Departures are available from Dubrovnik Old Town port, Cavtat, Mlini, and Srebreno, with the exact meeting point depending on the option you choose. The boat ride to Koločep takes about 25 minutes from the listed Dubrovnik departure.

The first part of the outing is worth paying attention to. From the Adriatic, Dubrovnik looks different. The massive stone walls sit above the water, with the old roofs behind them and the coastline stretching away on either side. You get a broad view that is hard to find from inside the Old Town.

This is also the point when you learn what kind of boat day you have signed up for. A speedboat moves quickly and can bounce across the waves. Most people enjoy the rush, but anyone prone to seasickness should take that seriously and consider medication before setting off.

Sit securely, hold onto your belongings, and expect spray. The ride back can be particularly lively if the sea has picked up. Several people enjoyed the bouncing waves, but that same motion may be uncomfortable if you prefer a calm crossing.

Swimming into Koločep’s Blue Cave

The Blue Cave is the tour’s main visual prize. You do not walk into it or board a small cave shuttle. You swim through a narrow entrance, then look back toward the opening as reflected sunlight gives the water a blue-green glow.

You receive a mask and snorkel, and the water is clear enough for the cave effect to be the focus. The scheduled stop lasts about 30 minutes, so you have time to swim, look around, and try the entrance again if conditions allow.

This is not a dry sightseeing stop. You need to get into the sea from the boat and swim to the cave. A lifejacket is available, and noodle floats can help, but the crew makes clear that safety equipment is not a substitute for swimming ability.

Conditions can change the feel of this stop. In high summer, several boats may arrive at once, leaving swimmers and craft sharing the same water. Keep your head up near the entrance, follow the crew’s instructions, and do not assume the cave will feel private.

For confident swimmers, the setting is memorable. For weaker swimmers, the narrow entry and moving water can be stressful. If you can float, turn, resurface, and swim to safety, you meet the basic requirement. Non-swimmers should not book this particular outing.

Three Green Caves and a choice of swim-throughs

After roughly 10 minutes by boat, you reach the Three Green Caves, also on Koločep. The stop lasts about 30 minutes and gives you a different type of cave visit.

Two caves are wider and more welcoming. You can snorkel near the openings, look into the rock, and spend time in the water without committing to a tight passage. The third cave is the adventurous option. It has a narrow route that takes swimmers through the island and out the other side.

I like this stop because it gives the group some choice. You can stay in the open water, explore a cave entrance, or attempt the swim-through if you feel comfortable. It is not a one-size-fits-all activity.

The narrow passage is not suitable for anyone who dislikes confined spaces or feels unsure in the water. The boat crew can provide lifejackets and float noodles, but you still need to make your own safety judgment. Do not let the excitement of the group pressure you into the passage.

Some departures have changed the order of the caves. The captain may visit the Green Caves first and the Blue Cave second, depending on the weather and sun position. That is sensible, since the light inside the caves affects what you see.

Šunj Beach gives you time to slow down

The final major stop is Šunj Beach on Lopud, about a 15-minute speedboat ride from Koločep. You get around 1.5 hours here, which is long enough to make this more than a quick photo stop.

Šunj is known for its fine pale sand and shallow water. The sea stays shallow for nearly 100 meters from shore, so it is easier to wade in than at many rocky Adriatic beaches. The crew anchors as close as possible to the beach, but you may still need to cross a short stretch of water to reach land.

This is the relaxing part of the day. Swim, dry off, order food, or simply sit on the sand. Lunch is not included, so bring money if you want something from the beach bars or cafés.

A useful local arrangement can save you from carrying a towel and searching for shade. If you buy a drink at the beach bar with the blue umbrellas, you receive a complimentary sunbed and umbrella. The drink purchase may cost about €15, so treat this as a beach-bar offer rather than a completely free lounger.

The bars and beach services generally operate from May. From November through April, Šunj may not be open for beach service, and the sea is cold for a typical swim. At that time, the stop can change to Lopud village or Koločep village, depending on which cafés, restaurants, and shops are open.

That seasonal detail matters. In summer, Šunj is a strong finish. Outside the main season, you should book for the island scenery and village stop rather than expecting a classic beach afternoon.

Drinks, music, and the character of the boat

The boat carries local beer, white wine, iced tea, cola, Fanta, and water. After swimming, having a cold drink already available is a real convenience. It also saves you from buying refreshments at every stop.

The supply is generous enough for the trip, but the official inclusion is a selection of drinks, not a promise of unlimited service. Bring your own expectations into line with that. If you want a full lunch, coffee, or fresh fruit, plan to buy it at Šunj.

Music is part of the experience. Guides often play songs on the outward and return journeys, and some boats become especially lively on the way back. Ivan is repeatedly singled out for his music and good humor, while other guides such as Rino and Mario have created a similarly relaxed mood.

That will appeal to you if you want a cheerful group outing. It may not suit you if you are hoping for a quiet boat ride with long explanations about island geology. The guide speaks English, Croatian, Bosnian, or Serbian, and information is provided, but the tone is usually informal and social.

How the timing affects the day

The stated duration is 4 to 5 hours, with approximately these travel and stop times:

• About 25 minutes by speedboat to Koločep
• About 30 minutes at the Blue Cave
• About 10 minutes to the Three Green Caves
• About 30 minutes at the Green Caves
• About 15 minutes to Šunj Beach
• About 90 minutes at the beach
• About 25 minutes back toward Dubrovnik
• A final scenic pass by the Old Port and city walls

The schedule gives you enough time to swim at both cave areas without turning the day into a rushed checklist. Šunj receives the longest stop, which is the right choice. After an hour in the sea, you will want time to sit down, dry off, and eat.

The tradeoff is that the cave stops are fixed and relatively short. If the water is crowded, you may spend part of your 30 minutes waiting for a clear moment to enter. Busy summer conditions are not a flaw in the route itself, but they do reduce the peaceful quality of the caves.

Practical concerns before you book

Bring swimwear and a towel. A waterproof phone case is useful if you want photographs inside the cave, though you should keep your attention on the water and other boats.

Toilets are usually available only at Šunj Beach. Sometimes the speedboat has one, but you should ask the crew when you arrive rather than count on it.

This is not a good choice if you have serious back problems. Speedboat movement can be sharp, especially in rougher water. It is also unsuitable for wheelchair users, non-swimmers, people prone to seasickness, and people over 80 according to the stated restrictions.

Boarding can require a step or careful movement. One person with a disability found the crew helpful, but access is not described as wheelchair friendly. Ask before booking if you have any mobility concern.

The captain can change the itinerary in bad weather. That may mean switching the Blue and Green Cave order or replacing Šunj with a village stop in the colder season. I consider that a sensible safety decision, not a reason to expect every departure to follow the same sequence.

Cancellation is flexible up to 24 hours before departure for a full refund, and you can reserve now and pay later. Check the exact starting location carefully because Dubrovnik, Cavtat, Mlini, and Srebreno departures do not use the same meeting point.

Who will enjoy it most

I would choose this tour if you:

• Want to swim and snorkel rather than only look at scenery from the boat
• Have basic swimming ability and feel comfortable entering open water
• Prefer a lively small-group outing with music and drinks
• Have limited time in Dubrovnik
• Want both natural stops and a sandy beach
• Like a little speed and spray between stops

I would choose something slower if you want a quiet historical tour, a private boat, or more time at one location. I would also avoid it if seasickness is a serious concern or if you cannot swim confidently.

The strongest part of the tour is the combination. The Blue Cave gives you the striking visual moment, the Green Caves give you options, and Šunj prevents the day from becoming one long sequence of getting in and out of the water.

Should you book the Blue Cave and Šunj Beach tour?

For most active visitors looking for a half-day on the Adriatic, yes. At $71, the fare is reasonable when you count the speedboat transport, guide, cave stops, snorkeling equipment, drinks, and 90 minutes at Šunj Beach.

Book it for the mix of swimming, scenery, and easygoing boat fun, not for solitude. Summer crowds can gather around the caves, the ride can be rough, and the beach bars cost extra. If those limits suit you, this is one of the more efficient ways to see Dubrovnik from offshore and sample the nearby islands in a single outing.

FAQ

Where does the tour depart from?

Departures are available from Dubrovnik Old Town port, Cavtat, Mlini, and Srebreno. Your exact meeting point depends on the option you book.

How long does the tour last?

The experience takes about 4 to 5 hours. The listed schedule includes two cave stops, roughly 90 minutes at Šunj Beach, and the speedboat rides between locations.

What is included in the price?

The price includes snorkeling equipment, local beer, white wine, iced tea, cola, Fanta, and water.

Is lunch included?

No. Lunch is not included. You can buy food at Šunj Beach when the bars and services are operating.

Do I need to know how to swim?

Yes. Basic swimming ability is required. You need to be able to enter the water, resurface, float, turn, and swim to safety. Lifejackets and noodle floats are available, but they do not replace swimming ability.

Can I enter the Blue Cave without swimming?

No. The Blue Cave is reached by swimming through its narrow entrance.

Is Šunj Beach open all year?

The beach bars and services generally operate from May. From November through April, the stop may be changed to Lopud village or Koločep village, depending on which local businesses are open.

Are toilets available during the tour?

Toilets are usually available at Šunj Beach. Sometimes the speedboat has a toilet, so ask the crew on the day.

Can the itinerary change?

Yes. The captain may change the order of the cave visits in bad weather or adjust the stops during the cooler months.