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

The best moment comes when you swim through the narrow entrance of Koločep’s Blue Cave and the water around you takes on a soft turquoise glow. This is not a cave you simply view from a boat. You enter it by swimming, which makes the short visit feel like a small expedition.

I like the smart mix of cave swimming and beach time, and I like that beer, wine, soft drinks, and water are included instead of being an afterthought. The main thing to consider is that this is an active trip on open water. Busy summer conditions, strong waves, a bouncy ride, and limited toilet access may not suit everyone.

Key points at a glance

• Swim into the Blue Cave: Koločep’s narrow entrance leads to glowing sea-colored light and clear water.
• Choose your Green Cave route: Two caves are easy for swimming, while a third offers a narrow passage through the island.
• Enjoy 90 minutes at Šunj Beach: Lopud’s sandy shore has shallow water, beach bars, and optional sunbeds.
• Ride with drinks included: Local beer, white wine, water, cola, Fanta, and iced tea are available on the boat.
• See Dubrovnik from offshore: The return route gives you a fine view of the Old Town walls and red roofs.
• Expect a shared outing: Boats generally carry a small group, but popular cave stops can still feel crowded in summer.

Why this half-day boat trip works

For about $71 per person and four to five hours, this tour gives you three different tastes of the Dubrovnik coast. You get a fast ride across the Adriatic, swimming in sea caves, time on one of the area’s best sandy beaches, and a coastal view of Dubrovnik that you cannot get from the Old Town walls.

I see the value in the variety. A cave-only boat trip could feel short, while a full-day island cruise might be too much if you have limited time. This outing keeps the pace moving, but it still leaves a generous 90 minutes at Šunj Beach.

The atmosphere is informal. Guides such as Ivan, Rino, Mario, Dora, Peter, Leo, and Tommy have been praised for friendly service, music, and keeping drinks available. The exact guide depends on the departure, but you can expect English, Croatian, Bosnian, or Serbian to be spoken.

This is not a quiet sightseeing cruise. The speedboat moves quickly, music may play on board, and the trip back can become a lively ride over the waves. If you want a calm boat with long explanations, this may not be your best choice. If you want swimming, scenery, and a bit of fun, it is a strong fit.

Setting out from Dubrovnik or Cavtat

Departures are available from Dubrovnik Old Town port, Cavtat, Mlini, and Srebreno, though the exact meeting point depends on the option you book. Confirm your pier before setting out, since Dubrovnik has several waterfront access points and a wrong assumption can make the start needlessly stressful.

The boat ride to Koločep takes about 25 minutes. That first stretch gives you time to settle in, take in the islands, and see the coast from a low position on the water. Bring a towel and swimwear, and keep anything you cannot afford to soak in a dry bag or secure place.

The boats are shared rather than private. Several trip times may operate, and group size can vary, but the experience is built around a small-group speedboat rather than a large sightseeing vessel. One recent trip carried about 14 people, a size that leaves the outing social without feeling like a full ferry.

The ride can be rough if the sea is active. People prone to seasickness should think carefully about this choice and consider appropriate precautions. The boat has lifejackets, and noodle floaters may also be available, but you still need basic swimming ability.

Koločep’s Blue Cave is the main event

The Blue Cave stop lasts about 30 minutes. The boat anchors near the entrance, and you swim through a narrow opening to reach the interior. There is no standard walk-in access, so you need to be comfortable entering the sea, resurfacing, floating, turning, and swimming to safety.

Inside, sunlight filtered through the water creates the cave’s blue-green glow. The effect changes with the position of the sun, which is one reason the captain may change the order of the stops. On some departures, the Green Caves come first and the Blue Cave later, depending on weather and light.

Snorkeling equipment is included. You receive a mask and snorkel, and the clear water makes this a good place to look below the surface as well as around the cave walls. You may also be able to try a cliff jump from the nearby rocks, but that is optional and depends on conditions and your own comfort.

This is the point where the tour feels most adventurous, but it is also where you should pay attention. The Blue Cave area can become crowded with other boats and swimmers in July and August. One useful tip is to stay alert when entering and leaving the water, since boats may be moving nearby and waves can push swimmers toward the entrance.

If you do not swim confidently, this stop will be more stressful than magical. Lifejackets are provided for safety, but they do not replace swimming skills. The crew may provide floats, and some guides are careful to help less confident swimmers, but this remains a water-based activity.

Three Green Caves, three different swims

After roughly 10 minutes by boat, you reach the Three Green Caves, also on Koločep. The stop lasts about 30 minutes and offers more choice than the Blue Cave.

Two of the caves are broad and easy to enter. They suit you if you want to snorkel, look into the clear water, and enjoy the rock formations without taking on a narrow passage. The third cave is the more unusual option. You swim through a tight channel and come out on the other side of the island.

That passage is a memorable feature, but it is not for anyone who dislikes confined spaces. Conditions also matter. Your guide may change what you do if the sea is rough, and the order of the cave visits can shift with the weather and sun.

I like this stop because it gives the group several ways to take part. Confident swimmers can try the passage or jump from the rocks. You can also stay with the wider caves and still get a proper swim and snorkel. The trip does not require everyone to choose the most daring option.

The water is the star here. It is clear enough for swimming and snorkeling, and several guides provide floats as well as masks. Still, do not expect solitude in high season. The caves are popular, and the water around the boats can become busy.

Šunj Beach gives the trip breathing room

The final major stop is Šunj Beach on Lopud, reached after about 15 minutes on the speedboat. You get around an hour and a half here, which is enough time to swim, lie on the sand, eat, or simply stop moving for a while.

Šunj is known for its long stretch of fine pale sand and shallow turquoise water. The sea remains shallow for nearly 100 meters from shore, making it easier to wade in and out than at many rocky Croatian beaches. The boat anchors as close as possible to the beach, but you should still expect to disembark into the water rather than step straight onto a pier.

The shallow water suits relaxed swimming and families who prefer an easy entry. It also means the beach can feel warm and busy in summer. This is not a remote cove. It has beach bars, umbrellas, and a social holiday atmosphere.

A useful local arrangement is available at the beach bars with blue umbrellas. If you buy a drink, you can receive a complimentary sunbed and umbrella. The cost of the drink is not included in the tour, and one reported price was €15, so ask before ordering if you are watching your budget.

Lunch is not included. You can buy food at the beach if services are operating, but do not assume every café will be open outside the main season. From May onward, Šunj’s bars and services begin operating. From November through April, the beach stop may change to Lopud village or Koločep village, depending on which cafés, restaurants, and shops are open.

That seasonal detail matters. In warm months, Šunj is a proper beach break. In cooler months, the tour becomes more about the islands and villages, and the sea may be too cold for a comfortable swim.

The ride back includes Dubrovnik’s best angle

The return journey takes about 25 minutes, followed by a scenic pass near Dubrovnik’s Old Port. You see the city walls from offshore, with the medieval fortifications rising above the water and the Old Town roofs behind them.

I consider this one of the tour’s best visual payoffs. From land, Dubrovnik’s walls can feel imposing and crowded. From the sea, you get a wider view of the fortifications, coastline, and roofs without having to fight for a viewpoint.

The ride home can be lively. Music is common, and some guides turn the boat into a small floating party. Several guides, including Ivan and Rino, have been praised for their music choices and friendly manner. That can be a pleasure after a day in the water, though music may feel too loud if you prefer quiet.

Hold onto your hat and your phone. The speedboat can bounce over the waves, especially on the return, and anything loose can slide or get wet.

What the $71 price really covers

At $71, the price is reasonable if you plan to use the included equipment and drinks. You are paying for boat transport between several islands, a guide and skipper, the cave stops, beach time, snorkeling gear, and a selection of drinks.

The drinks have real value on an active outing. Local beer, white wine, iced tea, cola, Fanta, and water are available, and guides often offer them after the swimming stops. You do not need to carry a large supply of drinks, though you still need food money if you want lunch at Šunj.

The price is less attractive if you do not swim or if you only want a scenic cruise. Much of the experience is built around entering the water, snorkeling, and moving between caves. For a non-swimmer, the beach and views alone may not justify the fare.

I also would not compare this with a private charter. This is a shared boat, so you trade privacy for a lower cost and a more social mood. A group of roughly a dozen people can feel comfortable, but busy cave areas will still include people from other boats.

Who should book this experience

I would choose this tour if you want a four-hour coastal adventure rather than a full-day island visit. It suits couples, friends, and families with older children who can swim and are happy with a fast boat.

It is especially good for you if:

• You want to swim in caves rather than only photograph them.
• You prefer sandy Šunj Beach to Dubrovnik’s usual rocky swimming spots.
• You like music and a friendly, social boat atmosphere.
• You want drinks included and do not need a formal lunch.
• You have limited time but still want to see Koločep and Lopud.
• You enjoy a little speed and movement on the water.

I would hesitate if you have back problems, are prone to seasickness, use a wheelchair, cannot swim, or are over 80. Boarding a speedboat can also be difficult with some disabilities, though crew members may offer help. Ask about your specific needs before booking rather than relying on the boat crew to solve everything at the pier.

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. Plan accordingly before leaving the port.

Practical ways to enjoy the day

Wear your swimwear under your clothes and bring a towel. A waterproof phone pouch is useful if you want pictures inside the caves, but keep your phone secure during the faster sections.

Bring sun protection, though only the listed drinks are included. Food is not part of the price, so you may want to eat before departure or budget for something at Šunj. If you want a sunbed and umbrella, remember that you generally need to buy a drink from the beach bar.

Arrive with enough time to find the correct meeting point. The departure may be from the Old Town port, Cavtat, Mlini, or Srebreno, and the meeting location changes with the option booked.

Keep your plans flexible if the weather looks unsettled. The captain can reverse the cave order or adjust the route. That is not a flaw in the operation. It is the sensible way to handle sun position, waves, and swimming conditions.

The tour offers free cancellation up to 24 hours before departure, and you can reserve now and pay later. Those terms help if the forecast is uncertain, but they do not change the need to choose an activity suited to your swimming ability.

Should you book the Blue Cave and Šunj Beach tour?

Book it if you want the biggest variety in a short outing: a fast ride, two cave stops, snorkeling, drinks, beach time, and a fine view of Dubrovnik from the sea. The Blue Cave is the clear highlight, while Šunj Beach keeps the day from becoming one long sequence of wet and energetic stops.

Skip it if you want peace, privacy, easy access for limited mobility, or a tour that does not depend on swimming. For most confident swimmers visiting Dubrovnik in the warmer months, though, the combination of glowing cave water and a sandy island beach makes the $71 price a fair deal.

FAQ

How long does the Blue Cave speedboat tour last?

The tour lasts about four to five hours, depending on the departure time, sea conditions, and route adjustments.

Where can I join the tour?

Departure options include Dubrovnik Old Town port, Cavtat, Mlini, and Srebreno. The exact meeting point depends on the option you book.

Is snorkeling equipment included?

Yes. Masks and snorkels are included, and lifejackets and noodle floaters may also be available for use.

What drinks are included?

The boat provides local beer, white wine, water, iced tea, cola, and Fanta.

Do I need to know how to swim?

Yes. Basic swimming ability is required because the cave stops involve entering the sea. You need to be able to enter the water, resurface, float, turn, and swim to safety.

Is lunch included?

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

Can the itinerary change?

Yes. The captain may change the order of the Blue Cave and Green Caves, or adjust the stops, because of weather, waves, or the position of the sun.