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

Croatia looks best from the water. This four to five-hour speedboat trip links Dubrovnik’s sea walls, Koločep’s Blue Cave and Three Green Caves, and sandy Šunj Beach on Lopud. I especially like the mix of active swimming stops and relaxed beach time, plus the included beer, wine, soft drinks, and snorkeling gear.

The tour is also good value at $71 per person, particularly if you want several highlights in half a day without arranging boats, equipment, and drinks separately. The main catch is that the caves can become crowded in summer, and the boat ride may feel rough if you are prone to seasickness.

Key points to know before you book

• Swim into Koločep’s Blue Cave: The narrow entrance is reached from the water, and sunlight gives the cave its blue-green glow.
• Three Green Caves offer different levels of adventure: Two are easy for relaxed snorkeling, while the third is a narrow swim-through passage.
• Šunj Beach gives you a proper sandy break: You get about 90 minutes for swimming, food, sun, and a break from the boat.
• Drinks are included throughout the trip: Beer, white wine, water, cola, Fanta, and iced tea are available after the swimming stops.
• Dubrovnik’s walls look different from offshore: The return route gives you a broad sea view of the Old Town and its red roofs.
• This is a swimming tour first: Basic swimming ability is required, and the experience is not suitable for non-swimmers, wheelchair users, or people with serious back problems.

Why this boat trip works so well in Dubrovnik

Dubrovnik is famous for its stone walls and Old Town lanes, but the city can feel crowded and hot in summer. This excursion gives you a change of pace. For a few hours, your main concerns are clear water, warm sun, a good swim, and finding a comfortable place to sit on the beach.

The route also makes practical sense. You get the city panorama at the beginning and end, then spend most of the outing around Koločep and Lopud. That means less time sitting in the harbor and more time in the water.

I like the balance here. The caves provide the adventure, while Šunj Beach gives you time to slow down. You are not rushed from one photo stop to the next. The cave stops last about 30 minutes each, and the beach stop lasts about an hour and a half.

It is a shared small-group trip rather than a private charter. Boats commonly carry a manageable group, with one recent outing described as having no more than 14 people. That size allows a social atmosphere without turning the boat into a packed ferry, though several boats may gather at the most popular caves.

Setting off from Dubrovnik or Cavtat

Departure options include Dubrovnik Old Town port, Cavtat, Mlini, and Srebreno, depending on the booking selected. The exact meeting point can vary, so check your confirmation carefully rather than assuming every boat leaves from the same pier.

The ride out takes about 25 minutes. This is when the speedboat begins to earn its place. You cover water quickly, and the open views arrive almost at once. Keep your camera ready as Dubrovnik’s fortifications come into view from the sea.

From offshore, the Old Town has a different character. Its thick walls rise above the water, with terracotta roofs behind them and the Adriatic spread in front. The sight is especially useful for putting the city’s position into context: Dubrovnik is not simply a walled town beside the sea, but a historic port built around a dramatic rocky coast.

The ride can be lively. Speedboats bounce more than larger sightseeing boats, especially when waves pick up. Sit securely, keep loose hats and phones under control, and bring seasickness medication if you know you need it.

Swimming into the Blue Cave on Koločep

The Blue Cave is the main event for many people. You do not walk into it. You swim through a narrow entrance, so you need to be comfortable entering the sea, resurfacing, floating, turning, and swimming back to safety.

Inside, sunlight reflects through the water and gives the cave its blue-green shine. The effect depends on the sun, sea conditions, and the number of people in the water, but the short swim through the entrance is the memorable part. Snorkeling equipment is provided, and the water is clear enough to make floating near the cave entrance enjoyable even if you are not a strong underwater explorer.

Lifejackets and noodle floats are available. Still, a flotation aid is not a replacement for swimming ability. If you feel uncertain, tell the crew before entering the water and use the equipment provided.

There can be traffic around the cave. Boats arrive and leave, and swimmers share the same entrance. Pay attention to the captain’s instructions and avoid lingering in the path of moving boats. The conditions may also change during the day. If weather or the sun’s position makes the usual order less suitable, the crew can visit the green caves first and the Blue Cave second.

Cliff-jumping may also be possible from nearby rocks for confident swimmers. This is an optional extra, not the main purpose of the stop. You should only do it if the crew indicates it is safe and you are comfortable with the height and water conditions.

Choosing your route through the Three Green Caves

Ten minutes after the Blue Cave, the speedboat reaches the Three Green Caves. This stop lasts about 30 minutes and gives you a little more choice than the first cave visit.

Two caves are wide and relatively easy to enter for swimming and snorkeling. The third has a narrow passage that lets you swim through the island and come out on the other side. It is a fun challenge for confident swimmers, but you should not feel pressured to attempt it.

This is one of the strongest parts of the trip for mixed groups. A confident swimmer can try the passage, while someone who prefers a gentle float can stay in one of the wider caves. The guides also provide snorkeling gear, lifejackets, and noodle floats.

The tradeoff is crowding. In July and August, several boats can arrive at once. You might need to wait for space near the cave entrance, and swimmers need to keep their heads up for boat traffic. That does not ruin the stop, but it does make the experience less quiet and secluded than the photographs may suggest.

If you want the calmest possible cave visit, an early morning departure may help. One early outing was praised for its comfortable timing, clear water, and relaxed feel. Still, the captain controls the final order based on conditions.

Taking a proper break at Šunj Beach

After the cave stops, the boat travels about 15 minutes to Šunj Beach on Lopud. This is a welcome change from rocky swimming areas. Šunj is known for its long stretch of fine pale sand and shallow water.

The shallow section extends nearly 100 meters from shore, so the boat anchors as close as conditions allow. You may still need to walk through shallow water to reach the beach, so sandals or secure water shoes can be useful, though swimwear and a towel are the essential items.

You get around 90 minutes here. That is enough time for a swim, a little sun, and a drink or meal at the beachfront area. The beach bars and services operate from May, so conditions are more limited outside the main season.

A useful detail is the sunbed arrangement. At the beach bar with blue umbrellas, buying a drink can include a complimentary sunbed and umbrella. One drink has been priced at €15 in a recent account, so treat this as a convenience rather than a completely free beach setup. If you were planning to buy a drink anyway, it can be worthwhile. If not, bring realistic expectations about beach costs.

Lunch is not included. You can buy food at the beach, but the exact options and opening hours depend on the season. From November through April, Šunj may not be operating in the usual way, and the stop can change to Lopud village or Koločep village, where cafés, restaurants, and shops are open that day.

The return ride and Dubrovnik panorama

The journey back takes about 25 minutes, followed by a scenic pass along Dubrovnik’s Old Port and city walls. This is a good moment to look back at the route and enjoy the coast without needing to swim.

The atmosphere on the boat can be lively. Guides such as Ivan, Rino, Mario, Dora, Leo, Peter, and Tommy have been praised for keeping the mood friendly and helping with drinks, equipment, and timing. Music is often played on board, and some crews turn the return ride into a small floating party.

That style will suit you if you enjoy music and a social group. It may not suit you if you want a quiet nature excursion. One useful detail from the feedback is that the music can be loud for some people, so do not expect a silent cruise.

Drinks include local beer, white wine, iced tea, cola, Fanta, and water. The supply is a real benefit after two swimming stops, although the exact amount can vary. You should not expect a full meal or a bar with endless choices. Think of the drinks as simple refreshments included with the trip.

What the $71 price really covers

At $71 per person, this is not the cheapest way to reach the islands, but it covers several elements that add up quickly if arranged separately. You get speedboat transport, a guide and captain, snorkeling equipment, access to two cave areas, beach time, and a range of drinks.

The value is strongest if you want an active half-day and would otherwise book a boat trip plus equipment rental. It is also useful for a first visit to Dubrovnik because you see the Old Town from the sea while visiting nearby islands in one outing.

The value is weaker if you mainly want a quiet beach day. In that case, the cave stops and speedboat travel may feel like more activity than you need. You also pay for a shared boat, not a private experience, and summer crowds can affect the cave visits.

The highly positive rating, 4.8 from 502 ratings, reflects a consistent formula: friendly guides, clear water, music, drinks, and a good mix of stops. The strongest praise goes to the crew, especially guides named Ivan and Rino, who are often credited with creating an easygoing mood and helping less confident swimmers.

Practical advice for a smoother outing

Bring swimwear and a towel. You may also want sunscreen, a waterproof phone case, sunglasses with a strap, and a small bag that closes securely. The cave colors are difficult to capture with an ordinary phone, so an underwater case is useful if you want photographs.

Wear something that stays secure during the speedboat ride. Loose hats and unsecured belongings can be a problem when the boat hits waves.

Toilets are usually available only at Šunj Beach. Sometimes a speedboat with a toilet is used, but you should ask the crew at the start rather than count on it.

The tour is not suitable for people over 80, people with back problems, wheelchair users, non-swimmers, or people prone to seasickness. Getting on and off a speedboat also requires balance and mobility. One person with a disability received help from the crew, but the general setup is not designed for wheelchair access.

The captain can change the route in bad weather. That is sensible on an open-water trip, but it means the exact order and even the final stop may vary. From November through April, the sea may be cold and Šunj’s services may be closed, so the route can shift to a village stop instead.

You can cancel up to 24 hours before departure for a full refund, and the reserve-now-pay-later option keeps the booking flexible. Starting times vary by date.

Who will enjoy this most?

I would recommend this trip to you if you like swimming, snorkeling, music, and a friendly group atmosphere. Families with older children who can swim, couples wanting an active afternoon, and friends looking for a scenic break from Dubrovnik all fit the tour well.

It is especially good for people who want several experiences in one half-day: city views, island scenery, caves, a sandy beach, and drinks. The pace is active but not exhausting, with enough time at Šunj to recover between water stops.

I would be more cautious if you dislike boats that move quickly, get seasick, prefer quiet tours, or want a completely private outing. The caves are beautiful, but they are popular. You should also be comfortable swimming in open water and sharing the stops with other boats.

Should you book the Blue Cave and Šunj Beach tour?

Book it if you want an easy, well-priced introduction to Dubrovnik’s nearby islands and you are happy to spend much of the outing in the water. The Blue Cave is the visual highlight, the Green Caves add variety, and Šunj Beach gives the day a comfortable finish.

For the best chance of calmer conditions, consider an early departure and bring your own towel, sunscreen, and waterproof phone case. If you are visiting outside the main beach season, check the planned substitute stop before booking.

This is not a peaceful island cruise. It is a sociable speedboat outing with swimming, music, drinks, and a little adventure. For the right kind of day, that is exactly why it works.

FAQ

How long does the Blue Cave and Šunj Beach tour last?

The tour lasts about four to five hours, depending on conditions, timing, and the selected departure option.

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 booked.

Is snorkeling equipment included?

Yes. Masks and snorkels are included, along with lifejackets and noodle floats for use when needed.

What drinks are included?

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

Do I need to know how to swim?

Yes. Basic swimming ability is required. You must be able to enter the water, resurface, float, turn, and swim to safety.

Is lunch included?

No. Lunch is not included, but food may be available for purchase at Šunj Beach when its bars and services are operating.

Are toilets available during the tour?

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

Can the route change?

Yes. The captain may change the order or itinerary because of weather or the position of the sun. From November through April, the Šunj stop may be replaced by Lopud village or Koločep village when beach services are closed.