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

Koločep’s Blue Cave is the star here. You swim through a narrow entrance into a cool chamber lit by turquoise reflections, then spend the day moving between sea caves, clear water, and a proper sandy beach. It is a lively way to see the Dubrovnik islands without committing to a full-day boat cruise.

I like the mix of adventure and downtime. You get snorkeling at the Blue Cave and Three Green Caves, then about 90 minutes at Šunj Beach, with beer, wine, soft drinks, and water included. Guides such as Ivan, Rino, Mario, and Dora add plenty of energy with music and friendly help.

The main drawback is that the caves can be crowded in summer, and the speedboat ride may feel rough if you suffer from seasickness. This is also a swimming tour first, so it is not a good fit for non-swimmers or anyone wanting a quiet sightseeing cruise.

At a glance

• Swim into Koločep’s Blue Cave: The cave is reached through a narrow entrance, so you need basic swimming ability.
• Explore three different cave openings: The Three Green Caves offer two broad snorkeling areas and one narrow passage through the island.
• Finish at sandy Šunj Beach: You get about 1.5 hours for swimming, sunbathing, food, or a drink under a beach umbrella.
• Enjoy drinks during the cruise: Local beer, white wine, iced tea, cola, Fanta, and water are included.
• See Dubrovnik from offshore: The return route gives you a strong view of the Old Town walls and red rooftops from the Adriatic.
• Expect a social boat atmosphere: Music, swimming, and a small shared group make this better for fun-seeking couples, friends, and families than for solitude.

Why this half-day cruise works so well

At $71 per person, this is priced as a midrange Dubrovnik excursion, but the value comes from how much it fits into four to five hours. You are not paying only for a boat ride. The fare covers speedboat transport, a guide, snorkeling equipment, several drinks, two cave stops, and time at one of the area’s best-known sandy beaches.

I especially like the balance. Many short boat trips give you one swim stop and a quick look at an island. This one gives you three different kinds of water time: the enclosed glow of the Blue Cave, the open rock formations around the Green Caves, and the shallow shore at Šunj.

The experience is not polished in a formal, luxury-yacht way. It is more relaxed and playful. Guides often put on music, check if you need a drink after swimming, and help less confident swimmers with lifejackets or noodle floats. Ivan receives repeated praise for his humor, music, and easygoing manner, while Rino, Mario, Dora, Peter, Leo, and others have also led trips.

That personality matters. A speedboat tour can feel rushed if the crew treats every stop like a timed transfer. Here, the best part is the informal rhythm: ride, swim, climb back aboard, grab a drink, and move on to the next cove.

Leaving Dubrovnik for the Koločep coast

Departures are available from Dubrovnik Old Town port, Cavtat, Mlini, and Srebreno, depending on the option you book. Check the exact meeting point carefully because it can vary. The Old Town departure is listed around Porat Dubrovnik, and the return includes a pass by Dubrovnik’s Old Port.

The first ride lasts about 25 minutes. This is more than a transfer. From the water, Dubrovnik’s medieval walls rise above the sea, backed by terracotta roofs. The view is especially useful if you have already walked the Old Town, because you see how dramatically the city sits above the Adriatic.

A speedboat also changes the feel of the outing. You cover the distance to Koločep quickly, with wind, spray, and a lively ride instead of a slow ferry crossing. The tradeoff is motion. Several people have found the return ride bouncy, and anyone prone to seasickness should consider taking appropriate medication before setting out.

Boat layouts and exact group sizes can vary. This is a shared small-group tour, not a private charter. One party described a boat carrying around 14 people, but you should not treat that as a guaranteed capacity. If you want complete control over the route and timing, book a private boat instead.

Swimming into Koločep’s Blue Cave

The Blue Cave is the most memorable stop for good reason. You do not simply look into it from the boat. You swim through a narrow opening, with a mask and snorkel provided, and enter a darker chamber where sunlight filters through the sea.

The famous blue glow depends on the sun and water conditions. It is not a light show, and the color may change with the time of day, weather, and the position of the sun. The captain can adjust the order of the stops for this reason. On some departures, the Green Caves come first and the Blue Cave later.

You get about 30 minutes here. That sounds brief, but it is enough for a swim, a look inside the cave, and some time floating outside. The water is clear, and the rock walls make this feel very different from ordinary beach snorkeling.

The entrance is the practical issue. You must be able to enter the water, resurface, float, turn, and swim to safety. Lifejackets are available, and noodle floats can help, but safety equipment does not replace swimming ability. If waves are running, getting into the water may require care, especially with several boats nearby.

Cliff-jumping may also be possible from the surrounding rocks for confident participants, but it is optional. You should never feel pressured to do it. The main attraction is swimming into the cave, not proving how brave you are.

Bring a waterproof phone case if you want pictures from inside. Regular cameras and phones are not useful once you are in the water, and there is no guarantee you will have time for elaborate photography.

The Three Green Caves and their three levels of adventure

A short ride of about 10 minutes brings you to the Three Green Caves, also on Koločep. You have roughly 30 minutes here, with three different ways to enjoy the stop.

Two caves are broad and relatively approachable. They work well for easy snorkeling and looking around from the water without committing to a tight passage. The third cave is narrower. Swimmers can pass through the island and come out on the other side, which gives the stop a little more adventure.

This arrangement is useful for mixed groups. One person can stay near the boat with a float, another can snorkel around the wider openings, and a stronger swimmer can attempt the passage. You do not all need to choose the same level of activity.

Still, the narrow route is not for everyone. You need to be comfortable in the water and able to judge your own limits. Cave entrances can also feel busy when several boats arrive together. Keep aware of nearby swimmers and moving boats, particularly around the first stop, where summer congestion has been noticeable.

The cave stops are primarily about swimming and scenery, not a formal nature talk. Your guide may provide information about the area, but the main experience is physical: clear water, rock walls, and short bursts of exploration. If you prefer land-based sightseeing, this will feel too active.

Šunj Beach gives the tour a proper finish

After the caves, the boat travels about 15 minutes to Šunj Beach on Lopud. This is the relaxing part of the day, and I think it makes the tour more satisfying than a cave-only outing.

Šunj is known for its long stretch of pale sand and shallow turquoise water. The sea remains shallow for nearly 100 meters from shore, making it easier to wade and swim than from many of Dubrovnik’s rockier beaches. The boat anchors as close as conditions allow, but you should still expect to get into the water for the final approach.

You receive about 1.5 hours here. That is enough time to dry off, walk along the sand, swim without a mask and snorkel, or find a drink and something to eat. Lunch is not included, so budget for food if you expect to be hungry after the cave stops.

A useful beach detail is the sunbed arrangement. At the beachfront bar with blue umbrellas, buying a drink can come with a complimentary sunbed and umbrella. The precise price and arrangement can change, but one recent experience put the drink at about €15. Ask before ordering so you know what is included.

The beach is not a deserted cove. In the summer season, other boats and beachgoers are part of the scene. That is the price of having a sandy shore with bars and services. In May, the beach facilities begin operating, while from November through April the stop may be changed to Lopud village or Koločep village because the beach businesses may be closed and the sea is colder.

Drinks, music, and the boat atmosphere

Drinks are one of the tour’s practical strengths. Local beer, white wine, iced tea, cola, Fanta, and water are included. After swimming in salt water and sitting in the sun, having something cold ready on the boat is genuinely useful.

The crew often pours drinks between stops, and the atmosphere can become party-like on the ride back. Music is a regular feature. Some people enjoy the festive soundtrack, while one person found the volume a little high. If you want silence and a guide speaking constantly, this is probably not your ideal boat trip.

The food situation is simple. Lunch is not included, and the boat is not presented as a meal service. You can buy food at Šunj when the beach businesses are open, or bring whatever the booking instructions allow. At minimum, bring swimwear and a towel.

Toilets are usually available only at Šunj Beach. Sometimes a speedboat with a toilet is used, but you should ask the crew on the day rather than count on it. That matters on a four to five-hour outing, especially for families.

What the speedboat ride is really like

The ride is quick and scenic, but it is not always gentle. On calm water, the speed makes the tour exciting and efficient. On rougher water, you may bounce over the waves, particularly on the return to Dubrovnik.

Hold onto hats, phones, and loose belongings. Sit securely and listen to the skipper’s instructions when approaching caves or swimming areas. The crew can change the order of stops if weather or sun position makes another plan safer or more attractive.

This flexibility is a plus, not a failure to follow the schedule. The Blue Cave’s color depends on light, and sea conditions can make a cave entrance awkward. A good skipper may reverse the order or substitute a nearby swimming spot. One spring trip changed course to favored cliff-jumping locations when the sea was not suitable for the planned route.

The tour requires basic swimming skills. It is not suitable for non-swimmers, people with serious back problems, wheelchair users, people prone to seasickness, or people over 80. The boat may be difficult to board if you have a disability, although crew members have helped some passengers. Contact the provider before booking if boarding or swimming is a concern.

Timing, season, and who gets the best value

A four to five-hour trip fits neatly into a morning or afternoon in Dubrovnik. It leaves room for a meal, Old Town sightseeing, or an evening plan. An early start can give you cooler conditions and a calmer feel, while later departures may suit people who want to sleep in or spend the morning in the city.

The most reliable beach experience is from May through the warmer months, when Šunj’s bars and services operate. Outside that period, the route may shift to a village stop, and the sea may be too cold for the same kind of swimming day.

I think the $71 price is fair if you plan to swim at every stop and will use the included drinks and snorkeling gear. Paying separately for a boat ride, equipment, drinks, and a visit to Šunj could quickly approach the same amount. The value is weaker if you dislike swimming, rarely drink soft drinks or alcohol, or mainly want to photograph Dubrovnik from the water.

This suits active couples, families with capable swimmers, and friends who like a social outing. It also works well for a first visit because you see the city walls, nearby islands, caves, and a sandy beach in one compact trip.

It is less suitable for a slow, quiet day. You will share the boat, encounter other boats at popular cave sites, and follow the captain’s timing. The experience is about variety and energy, not solitude.

Should you book the Blue Cave speedboat tour?

Book it if you want a lively half-day on the water with real swimming, cave exploration, and a comfortable beach finish. The Blue Cave is the highlight, the Green Caves add variety, and Šunj gives you time to relax rather than rushing from one photo stop to the next.

Skip it if you are a non-swimmer, get seasick easily, need guaranteed toilet access, or want a private and quiet boat. Also think twice if your visit falls outside the beach season and the sandy beach is a major reason for booking.

For most capable swimmers, this is a strong use of four to five hours in Dubrovnik. Pack a towel, swimwear, sun protection, and a waterproof phone case. Then let the crew handle the route, keep an eye on the weather, and enjoy the Adriatic at water level.

FAQ

Where does the Blue Cave speedboat tour depart from?

Departure options are available from Dubrovnik Old Town port, Cavtat, Mlini, and Srebreno. The exact meeting point depends on the option booked, so check your selected departure location carefully.

How long does the tour last?

The tour lasts approximately four to five hours. The listed route includes about 30 minutes at the Blue Cave, 30 minutes at the Three Green Caves, and 1.5 hours at Šunj Beach, along with the speedboat rides.

Is snorkeling equipment included?

Yes. Masks and snorkels are included, and lifejackets and noodle floats are available for safety and support. You still need basic swimming skills.

What drinks are included?

Included drinks are local beer, white wine, iced tea, cola, Fanta, and water. Lunch is not included.

Can non-swimmers join the tour?

No. Basic swimming ability is required. You must be able to enter the water, resurface, float, turn, and swim to safety. The tour is not suitable for non-swimmers.

Is Šunj Beach open all year?

Šunj Beach bars and services begin operating in May. From November through April, the stop may be changed to Lopud village or Koločep village, depending on which cafés, restaurants, and shops are open.