Blue cave, Mamula island, Submarine tunnels and Our lady of the Rocks (3h)

The Adriatic saves its best color for caves. This three-hour speedboat trip from Kotor packs the Blue Cave, Mamula Island, submarine tunnels, and Our Lady of the Rocks into one lively outing. I like the strong mix of swimming, scenery, and history, and I like the price: at $42.41 per person, it offers a lot for a short morning or afternoon. The tradeoff is simple: you spend about 70 minutes reaching the cave, and open-water conditions can make that ride rough.

I also like the small-group format, capped at 20 people, and the crew’s generally friendly approach. Captains such as Andrej have earned praise for clear explanations, smooth boat handling, and helping with photos. Still, the experience is not ideal if you dislike speed, need a quiet tour, or expect a leisurely beach stop rather than swimming directly from the boat.

Key things to know before booking

• The Blue Cave is reached after about 1 hour and 10 minutes: The ride is part of the experience, but it takes up a large share of the three hours.
• Swimming is possible near the cave: You may swim from the boat, and snorkeling has also been offered, but there is no guarantee of calm water or a beach with an easy shore entry.
• The cave has two entrances: One is broad but low, while the other is narrow and tall, creating different views as the boat moves inside.
• Our Lady of the Rocks costs an extra €1.50: The island visit is included, but entry to the church is not.
• The speedboat can be bumpy: Sit toward the back if you want a smoother ride, based on the practical advice from past participants.
• The tour returns to its starting point: You meet at CQG9+H6W in Kotor and finish back there, useful if you are visiting from a cruise ship.

Leaving Kotor across the Bay

The tour begins at CQG9+H6W, a meeting point close to Kotor’s waterfront. Finding it is usually straightforward, though one person found the pickup point slightly tricky despite its proximity to the cruise tender area. If you are arriving by ship, allow a little extra time to get off the tender and walk to the meeting point.

Once aboard, the opening run carries you across the Bay of Kotor. This is not just a transfer from one stop to another. The bay is lined with old fishing villages, stone buildings, steep hills, and thick plant growth. From the water, the shoreline makes more sense than it does from a road. You see how the villages fit into narrow coastal pockets and how the bay opens gradually toward the Adriatic.

The speedboat changes the feel of the outing. You cover a lot of water quickly, with wide views in every direction, but you also feel every wake and wave. Several people enjoyed the excitement, while others found the ride choppy. The front seats take the hardest jolts, so the back is the safer choice if you have a sensitive back, young children, or simply prefer comfort over speed.

The boat carries no more than 20 people, although some departures have been much smaller. One group had only nine people, including the operator. A smaller load gives you more room and makes it easier to hear the guide, but the exact atmosphere depends on the departure.

The guides vary in style. Some captains provide lively explanations about the bay and its sights. Andrej has been singled out for being friendly and informative, while other passengers found the commentary too fast or difficult to understand. It is worth treating the narration as a bonus rather than the sole reason to book. The scenery does most of the work.

The Blue Cave after 70 minutes on the water

After roughly 1 hour and 10 minutes, the boat reaches the Blue Cave. This timing matters. The cave is the headline attraction, but the trip is not a quick excursion from Kotor. You should be comfortable spending a long stretch on open water before the main stop appears.

The cave can be entered through two openings. One entrance is wide and low. The other is narrow and tall. Sunlight enters through the water and openings, producing the blue glow that gives the cave its name. The effect changes with the weather, the angle of the sun, and the number of boats moving around inside.

You may have time for photographs and a swim near the cave. Some departures include a stop at a nearby cove, while others have passengers swim directly from the boat. That difference is important. You should not assume you will step onto a sandy beach or find a railing in the water. One account describes swimming about 100 meters offshore in water around 25 meters deep, so confident swimming matters.

There may be no convenient handhold once you enter the water. If you are not a strong swimmer, ask the crew about safety arrangements before getting in. One family wished they had brought a flotation aid because the children tired quickly. Another passenger reported difficulty climbing back up the boat ladder and felt the crew offered too little help.

This is also the busiest part of the trip. Boats may queue near the entrance, and several can be maneuvering at once. One person felt that boats were reversing too close to swimmers, which made the water feel less relaxed. The cave can still be beautiful and exciting, but you may spend only a few minutes inside if traffic is heavy.

Bring swimwear, a towel, and a waterproof case for your phone. Bottled water is supplied, but food and other drinks are not. Rain gear may be available from the crew when weather changes, though you should not rely on that instead of carrying a light waterproof layer.

Mamula Island and the old sea defenses

Mamula, also called Lastavica, is an uninhabited circular islet at the entrance to Boka Kotorska. It lies between the Prevlaka and Luštica peninsulas, about 6.3 kilometers from Herceg Novi. The island is only about 200 meters across, but its position gives it real importance.

The key feature is the fortress, built to guard the bay entrance. The setting is striking because the small island sits alone between open sea and the protected waters of the bay. You get a useful sense of Montenegro’s maritime defenses without needing a long museum visit.

The tour may not provide a long walking stop on Mamula. The schedule gives a detailed visit to the Blue Cave and Our Lady of the Rocks, but no fixed duration is listed for Mamula. Expect the island to be part of the boat route and sightseeing rather than a full independent exploration. Ask the skipper how much time your departure will spend there.

This stop works best for people who enjoy seeing historic places in context. From the boat, the fortress, island, and surrounding channels form one clear picture. If you want to walk through the fort or spend time ashore, confirm what is planned before departure.

The submarine tunnels cut into the coast

The submarine tunnels are among the tour’s most unusual sights. They were built into the shoreline to hide military vessels, and the boat can take you close enough to see these dark openings in the rock.

They lack the polished look of a major monument. That is exactly why they are interesting. You are looking at practical military infrastructure, not a decorated church or a carefully restored old town. The tunnels also make the boat essential, since their meaning is tied to the coast and the water.

The provided schedule does not list a set time for this stop. The captain may point them out during the coastal run or make a short approach. Keep your camera ready, but do not expect a long shore visit unless the crew specifically confirms one.

Our Lady of the Rocks in Perast

The final major stop is Our Lady of the Rocks, the artificial island off Perast. It was built over centuries by piling rocks into the water and sinking old ships loaded with stones. That origin gives the island a very different character from natural islets such as Mamula.

The church is the largest building on the island and has an attached museum. There is also a small gift shop and a navigation light at the western end. You get about 20 minutes here, which is enough to see the island, take photos, and enter the church if you choose.

Church admission costs €1.50 and is not included in the tour price. Carry a little cash in euros so the extra fee does not catch you off guard. The visit is short, so you will need to choose between looking around the island, visiting the museum and church, and browsing the shop.

The island is especially rewarding after the open-water ride because it slows the pace for a moment. You can see the nearby Sveti Đorđe Island and look back toward Perast from the water. The small scale is part of the charm. This is not a place for a long wander, but it is a memorable stop with a strong local story.

What the $42.41 price really gets you

At $42.41 per person, this is a strong-value way to see several coastal sights in one outing. You receive transport by speedboat, a captain or guide, bottled water, swimming time, and return transport to Kotor. A private boat would cost far more, while a slower public boat would not give you the same range in only three hours.

The value depends on your priorities. If you want to see the Blue Cave, Mamula, the submarine tunnels, and Our Lady of the Rocks in a single half-day, the price is hard to criticize. You avoid arranging several separate boat rides and keep the rest of your day free.

The cost does not include food, drinks beyond the supplied water, or the €1.50 church entry. It also does not buy a private experience. Music may be played on board, commentary may vary, and you share the boat with other passengers.

The tour has a 4.8 rating from 575 ratings, with 96 percent of people recommending it. That high approval fits the strongest parts of the experience: beautiful scenery, capable boat handling, an efficient route, and a lot packed into three hours. It does not erase the practical cautions about rough water, swimming safety, and uneven guide communication.

Who will enjoy this speedboat trip most

I would recommend this outing to you if you want a fast introduction to the bay and coast rather than a slow, quiet cruise. It works well for cruise passengers, couples, families with older children, and anyone with only a few hours in Kotor.

Teenagers may especially enjoy the speed, swimming, and frequent changes of scenery. One family with children aged 13 to 18 found the format a good fit. The trip also suits photographers because the cave, islands, fortress, villages, and open-water views provide many different subjects.

You should think twice if you get seasick, dislike loud music, or want long visits at each site. The boat can move quickly, the sea can turn rough, and the schedule leaves little room for lingering. If you cannot swim confidently, ask about the water stop before you book, since swimming from the boat may involve deep water and a ladder climb.

The group limit of 20 is reasonable, but the actual boat may feel crowded if the departure fills. Past departures have ranged from small groups to larger loads. The experience is most comfortable when the captain leaves enough room for everyone to sit safely and hear the instructions.

Timing, weather, and practical planning

The tour lasts about three hours and returns to the original meeting point. That makes it easy to fit around a day in Kotor, but keep a buffer if you have a ship departure or another fixed appointment. The boat is scheduled to return on time, yet weather and sea conditions can affect the pace.

Good weather is required. If poor conditions cancel the trip, you are offered another date or a full refund. You can also cancel for a full refund up to 24 hours before the start time. Changes or cancellations inside that 24-hour window are not accepted.

Wear clothes that can handle spray. Secure hats and phones, and choose footwear that feels safe on a moving boat and a ladder. Sunscreen is sensible, but bring a light rain layer too. The crew has supplied rain gear during sudden showers, but conditions can shift quickly over open water.

The meeting point is near public transportation, and confirmation arrives when you book. Most people can participate, but the tour is not presented as fully accessible. The ladder back into the boat and the possibility of swimming from deep water are the main physical concerns.

Should you book the Blue Cave and Mamula tour?

Book it if you want maximum scenery in minimum time and you are happy with a fast, weather-dependent boat ride. The Blue Cave delivers the visual highlight, Our Lady of the Rocks adds culture and local tradition, and Mamula and the submarine tunnels give the route a military edge.

I would skip it if your ideal outing involves a calm ride, a guaranteed beach, or extended time at one place. Also skip the swim if you are not comfortable in deep water unless the crew can offer an option that suits you.

For most active visitors with three spare hours, this is a worthwhile buy. Go for the scenery and the range of stops, not for a slow guided tour. Sit toward the rear, bring swim gear and a waterproof layer, carry €1.50 for the church, and ask about swimming arrangements before the boat leaves.

FAQ

How long does the tour last?

The tour lasts approximately three hours and ends back at the meeting point in Kotor.

Where does the tour start?

It starts at CQG9+H6W in Kotor, Montenegro.

What places does the boat visit?

The route includes the Bay of Kotor, the Blue Cave, Mamula Island, submarine tunnels, and Our Lady of the Rocks.

Is swimming included?

Swimming may be offered near the Blue Cave, sometimes from the boat or at a nearby cove. The tour does not promise a beach stop, and swimming conditions can vary.

Is entry to Our Lady of the Rocks included?

The island visit is included, but entry to the church costs an additional €1.50.

What is included in the price?

Bottled water is included. Food and other drinks are not included.

How many people can join the tour?

The maximum group size is 20 people.

Can I cancel the booking?

You can cancel up to 24 hours before the start time for a full refund. Poor weather or failure to meet the minimum number of participants may also lead to a rescheduled tour or full refund.