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

The best part of this three-hour speedboat trip is the variety. You race past old fishing villages and steep shores, swim near the Blue Cave, peer into submarine tunnels, see Mamula fortress, and finish at the remarkable island church of Our Lady of the Rocks. It packs much of coastal Montenegro into one outing.

I like the strong value at $42.41 and the way the boat lets you cover sites that would take far longer by road. I also like the small-group format, with no more than 20 people, bottled water, and captains such as Andrej who explain the sights while keeping the ride lively.

The main catch is the time spent getting from one place to the next. The run to the cave takes about 70 minutes, and open-water conditions can be bumpy. If you want a slow, quiet cruise or need plenty of help getting in and out of the boat, this may feel rushed.

Key things to know before you book

• About 70 minutes to the Blue Cave: The ride is scenic, but the cave is not a quick hop from Kotor.
• Swimming is part of the fun: You may swim near the cave, though the boat can stop in deep water with nothing to hold.
• Mamula and submarine tunnels are viewed along the route: The old military sites add a strong historical edge to the trip.
• Our Lady of the Rocks costs extra: Church entry is €1.50, not included in the tour price.
• Expect speed and spray: The front seats are bumpier, especially when the sea is choppy.
• The tour returns to Kotor: The boat finishes at the same meeting point, useful if you are visiting from a cruise ship.

What this Kotor boat trip actually feels like

This is not a gentle sightseeing cruise. It is a fast coastal outing on a speedboat, with the engine working between stops and a soundtrack sometimes filling the ride. That makes the trip exciting, but it also means you should expect wind, spray, and a firm ride over the waves.

The route begins at CQG9+H6W in Kotor. The meeting point is close to the cruise tender area, though a few people have found the exact pickup spot slightly tricky to locate. Give yourself time to get your bearings, particularly if your ship is using tenders rather than docking directly.

The maximum group size is 20, though some departures may be smaller. One group had only nine people, while another had eight passengers on the speedboat. Smaller numbers make it easier to hear the guide and get a clear view, but the experience can vary by departure.

English is the offered language. Captains and guides explain the area, point out landmarks, and often help with photos. Andrej is one of the captains praised for clear explanations and a friendly manner. Commentary quality can vary, so do not book this solely for a formal history lecture. The boat ride and scenery are the main event.

The first 70 minutes across Kotor Bay

The opening run takes about 1 hour and 10 minutes. That sounds long on paper, but the bay gives you plenty to watch. The boat passes old fishing villages, thick coastal plant life, church towers, stone buildings, and small waterfront settlements.

Kotor Bay is often described as a fjord, though it is technically a submerged river canyon system. You do not need a geology lesson to appreciate it. The water narrows and widens as the boat heads toward the open Adriatic, and the views keep changing from enclosed bay to open sea.

This part of the journey is valuable because the boat gives you an unusual view of the shore. You see houses and small villages from the water, where their relationship with the bay makes more sense. Keep your phone ready, but protect it from spray. The boat can move quickly, and the best photo opportunity may last only a few seconds.

The ride is also where the main practical trade-off becomes clear. You are covering a lot of ground, so you spend a substantial share of the three hours in transit. Several stops help break up the journey, and recorded or live explanations may be offered, but this is not a tour with long stays in every village.

Sit toward the back if you want a smoother ride. The front can be the most exciting place to sit, but it is also where you feel the wake and waves most sharply. On rougher days, the crossing can be uncomfortable for anyone prone to motion sickness.

The Blue Cave: beautiful, brief, and weather dependent

The Blue Cave is the tour’s main attraction. It has two entrances, one wide and low, the other narrow and tall. Sunlight entering through the water gives the cave its blue glow, creating the kind of scene that works well in photographs and short videos.

You spend about 20 minutes at the cave. That is enough for a look, some photographs, and possibly a swim, but it is not a long beach stop. Boat traffic can be heavy, and several speedboats may arrive at the same time. You might have only a few calm minutes inside before another boat needs room to turn.

Swimming is often the most enjoyable part. Some departures include time in a nearby cove, while others stop offshore and let you swim from the boat. That distinction matters. If you are not a confident swimmer, ask the crew about the exact swimming arrangement before entering the water.

One practical point deserves attention: the boat may be moored in fairly deep water, with no platform or floating aid nearby. A passenger who tires easily found it hard to keep swimming without something to hold. The climb back up the ladder can also be awkward, especially after swimming. Crew assistance has not always been consistent, so take your time and use both hands.

Bring swimwear, a towel, sunscreen, and a waterproof phone pouch. Bottled water is included, but food and other drinks are not. A small flotation aid is useful for children or anyone who is not comfortable swimming in open water, though the supplied information does not state that the operator provides one.

Weather affects this stop more than any other. The water may be too rough for a comfortable visit, and the operator can change the route or cancel in poor conditions. If you get a rough-sea day, the captain may offer an alternative route rather than follow the plan exactly.

Mamula Island and the old fortress

Mamula, also called Lastavica, is a small round island at the entrance to Boka Kotorska. It lies between the Prevlaka and Luštica peninsulas, about 6.3 kilometers from Herceg Novi, and measures roughly 200 meters across.

The island is uninhabited, and its circular fortress gives it a stark appearance from the water. The fort was built as a defensive position, and later the island was used as a prison camp during the Second World War. The tour does not promise an extended shore visit, so expect to see Mamula from the boat rather than spend a long time exploring the fort on foot.

That limitation is worth knowing. Mamula is visually striking, but the stop is more about the setting and the story than a full museum visit. Your guide may explain the island’s past, and the boat gives you good angles for photographs. If you hoped to walk through the fortress, confirm the day’s route before booking.

Submarine tunnels carved into the coast

The old submarine tunnels are among the more unusual sights on this route. Built into the shoreline, these narrow openings once sheltered military submarines. From the water, they look plain at first, but their purpose becomes clear as the boat approaches the dark entrances.

This is a quick stop, not an underground tour. The boat may enter or pass close to the tunnels, depending on conditions and traffic. Their value is in seeing a piece of military infrastructure that is easy to miss from land.

The tunnels also give the trip a useful change of pace. The Blue Cave is a natural wonder and Our Lady of the Rocks is a religious and cultural site. Mamula and the submarine shelters show a more strategic side of the coast. Together, the stops make the route feel broader than a simple swimming trip.

Our Lady of the Rocks near Perast

Our Lady of the Rocks is an artificial island off Perast. Local tradition says the island grew over centuries as people placed rocks in the water and sank old ships loaded with stone. The church, museum, gift shop, and navigation light all sit on this small patch of land.

You have about 20 minutes here. That is enough to step ashore, look around, and enter the church if you choose. Admission costs €1.50 and is not included in the tour price. Bring a little cash for the fee and for the small gift shop if you want a keepsake.

The church is the largest building on the island, and the museum adds context to the paintings, objects, and traditions connected with the site. I consider this the most culturally distinctive stop on the tour. The Blue Cave is photogenic, but Our Lady of the Rocks tells you something about how communities shaped life on the bay.

Twenty minutes is still short. You will not have time for a long museum visit or an unhurried look at every detail. Move efficiently, and listen carefully when the guide explains the island. The small size of the site means it can feel crowded if several boats arrive together.

Price, timing, and what you get for $42.41

At $42.41 per person, this is a good-value way to reach several places that are spread around the bay and the coast. A private boat would cost far more, while a land-based outing would not give you the same access to the Blue Cave or the submarine tunnels.

The value comes from the route, not from long visits at each attraction. You are paying for a boat, a captain, transport across a wide area, commentary in English, bottled water, and a return to Kotor. The church fee, food, and drinks cost extra.

Three hours is enough to see a lot, but it is not enough to linger. Families with teenagers often appreciate the quick changes of scene, music, swimming, and speed. A couple wanting a relaxed afternoon may prefer a longer private cruise with fewer stops.

The tour is booked, on average, about 21 days ahead. That suggests you should reserve early if your Kotor visit falls during a busy season or a cruise call. Free cancellation is available until 24 hours before departure. Poor weather or a failure to reach the minimum number of participants can lead to a new date or a full refund.

Who will enjoy it most

I would choose this trip if you want maximum variety in limited time. It suits first-time visitors, cruise passengers, families with older children, and anyone who wants a mix of swimming, scenery, military sites, and culture.

You should be comfortable with a fast boat and some rough water. Most people can participate, but getting on and off may be difficult if you have limited mobility. The ladder after swimming can be slippery, and crew help may not always be available.

You will also enjoy it more if you treat the tour as an active sampler rather than a detailed guided visit. The English explanations add useful context, but the day is built around movement, views, photographs, and short stops.

Should you book this Blue Cave tour?

Book it if you want to see the Blue Cave, Mamula, submarine tunnels, and Our Lady of the Rocks in one compact outing for a reasonable price. The scenery is excellent, the route is varied, and the speedboat makes the distant stops practical.

Skip it if you dislike bumpy rides, need a long swimming stop, or want guaranteed assistance on the boat ladder. Check the sea forecast, sit toward the rear for a smoother ride, bring sun and swim gear, and allow extra time to find the meeting point.

For most active visitors with only a few hours in Kotor, this is a lively and worthwhile introduction to the bay and its outer coast.

FAQ

Where does the tour start?

The meeting point is CQG9+H6W in Kotor, Montenegro. The tour ends back at the same meeting point.

How long does the experience last?

The tour lasts approximately three hours.

What language is offered?

The activity is offered in English.

How many people can join the boat trip?

The maximum group size is 20 people.

Is bottled water included?

Yes. Bottled water is included in the tour price.

Is food included?

No. Food and other drinks are not included.

How much does entry to Our Lady of the Rocks church cost?

Church entry costs €1.50 and is paid separately.

Is swimming included?

Swimming may take place near the Blue Cave or from the boat, depending on the route and conditions. The tour information does not promise a specific beach stop.

Can the tour be canceled because of weather?

Yes. The experience requires good weather. If poor weather causes cancellation, you are offered another date or a full refund.

What is the cancellation policy?

You can cancel up to 24 hours before the start time for a full refund. Changes or cancellations made less than 24 hours before departure are not accepted.