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

The Blue Cave is the headline here, but the boat ride across Boka Bay is nearly as memorable. You speed past old fishing villages, steep shores, and pockets of thick greenery before reaching the cave after about 1 hour and 10 minutes. Inside, sunlight turns the water a striking blue, and you may get time to swim or snorkel nearby.

I like two things in particular: the strong mix of sights packed into three hours, and the way a speedboat lets you cover the long stretch from Kotor to the open Adriatic without spending all day on the water. Skippers such as Andrej have also made the ride fun with clear explanations, music, and help with photos.

The trade-off is the pace. The sea can be rough, the ride can feel very bumpy at the front, and the Blue Cave may be crowded with other boats. If you need a quiet, slow cruise or extra help climbing a boat ladder, this may not be the right outing.

Key points to know before booking

• About 1 hour and 10 minutes to the Blue Cave: The first stretch is scenic but long, and rough water can make it tiring.
• Swimming is part of the fun: You may swim near the cave or at a nearby cove, but the boat may stop offshore rather than at a beach.
• Mamula and submarine tunnels add history: These stark military sites give the trip more substance than a simple sightseeing cruise.
• Our Lady of the Rocks costs an extra €1.50: The church entrance is not included in the $42.41 tour price.
• Speedboat seating matters: The bow gets the biggest bumps, while the ride can feel smoother farther back.
• The trip returns to Kotor after three hours: That makes it practical for a short visit or a cruise stop.

Why this three-hour speedboat trip works

At $42.41 per person, this is priced as an easy way to see a large part of Montenegro’s coast without arranging several separate rides. You get a boat, an English-speaking crew, bottled water, and a route linking Kotor Bay with the outer bay near Herceg Novi.

The real value comes from the distance covered. Kotor is tucked far inside Boka Kotorska, while the Blue Cave and Mamula sit much closer to the bay’s Adriatic entrance. By speedboat, you can see both areas in one outing and still return to the same meeting point in roughly three hours.

You should think of this as an active sightseeing ride, not a relaxed yacht cruise. The boat moves quickly, the stops are short, and the sea may be choppy. In exchange, you get wide views, fresh air, several unusual sites, and time in the water.

The group limit is 20 people, though some departures may be much smaller. One reported boat carried nine people including the operator, while another had around eight passengers. A smaller group gives you more room and makes it easier to hear the skipper.

Crossing Boka Bay from Kotor

The trip begins at CQG9+H6W in Kotor and ends back at the same point. The meeting place is close to the waterfront and easy for many cruise passengers to reach, though finding the exact pickup spot can take a little attention if you arrive from the tender dock.

The first part follows the Bay of Kotor, with its old fishing villages, lush slopes, and stone buildings pressed close to the water. This is not simply transport to the cave. The crossing gives you a moving view of the bay’s changing character, from the enclosed inner waters near Kotor toward the wider, more exposed entrance.

After around 1 hour and 10 minutes, you reach the Blue Cave. That timing matters. If you are hoping for a quick look at the cave with most of the trip spent at the stops, adjust your expectations. Nearly half the excursion is spent getting there and back, although the views make the ride worthwhile.

The water can turn rough as the boat approaches the open sea. Several passengers found the ride exciting, while others found it too bumpy. Sit toward the rear if you want a gentler ride. The front gives you the most spray and movement, which may suit you if you enjoy a proper speedboat run.

Entering the Blue Cave near Luštica

The Blue Cave is the main reason most people book this trip. It has two entrances: one is broad but low, and the other is narrow but tall. The boat reaches the cave from the water, and the changing openings help explain why the interior feels so dramatic.

Light enters beneath the surface and gives the water its famous blue color. This is a good place for photos, though you should keep your phone secure and be ready to work quickly. The cave can attract several boats at once, so your visit may be brief and crowded.

The scheduled stop lasts about 20 minutes. That is enough for a look, some photos, and perhaps a short swim, but it is not a long cave visit. One important point: the boat may not take you onto a beach. On some departures, swimming has taken place from the boat in deep water or at a nearby cove.

That setup suits confident swimmers. If you are not comfortable in open water, tell the crew clearly before anyone enters the sea. One passenger reported difficulty getting back up the ladder and felt that the crew did not provide enough assistance. Another wanted a life jacket for swimming and had a very unpleasant exchange with the skipper.

Those incidents do not describe every departure, but they point to a sensible rule: ask about swimming arrangements before you leave the dock. If you need flotation support or help boarding, make that clear at the start. Bring a swimsuit only if you are comfortable with the possibility of entering from the boat.

Boat traffic is another factor. The cave is popular, and several speedboats may be maneuvering in the same small area. At busy times, you may get only a couple of minutes inside before the boat moves on. The cave is still striking, but the experience is less private than photographs might suggest.

Mamula Island and its round stone fort

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, and measures roughly 200 meters across.

The island’s appeal is its isolation and military character. Its stone fort gives the stop a stern, weathered feel, quite different from the churches and villages around the inner bay. From the boat, you can take in the round shape of the islet and its position guarding the entrance to the bay.

The supplied route does not give a separate duration for Mamula, so you should not expect a long shore visit unless the crew specifically confirms one. The tour is designed around a sequence of views and short stops, not extended time on each island.

Mamula is especially worthwhile if you like places that show Montenegro’s strategic past without requiring a full museum visit. It also breaks up the water time between Kotor and the cave. The sight is more about atmosphere and setting than a detailed guided tour of the fort.

The submarine tunnels along the coast

The old submarine hideouts are one of the most unusual parts of the route. Built into the coast, these tunnels were made to shelter submarines. Seeing them from a small boat gives you a sense of how easily the rocky shoreline could hide military craft.

The tunnels are dark, plain, and practical rather than ornate. That is precisely their appeal. They provide a glimpse of twentieth-century military infrastructure in a region more often associated with medieval towns, churches, and fishing villages.

The available details do not specify how long the boat spends inside the tunnels or whether every departure enters them fully. Weather, boat traffic, and sea conditions may affect the approach. Listen for the skipper’s instructions and keep your camera ready, since the view may pass quickly.

This stop adds useful context to the excursion. Without it, the outing would be mainly a scenic ride with swimming. With Mamula and the submarine tunnels, you get reminders that Boka Bay has long been a place of defense, naval movement, and careful control of the sea entrance.

Our Lady of the Rocks in Perast

The final major stop is Our Lady of the Rocks, the artificial island opposite Perast. It was built over centuries by piling up rocks and sinking old ships loaded with stone. That origin makes it unlike a natural Adriatic islet and gives the church setting a distinctly human story.

The Roman Catholic Church of Our Lady of the Rocks is the largest building on the island. A museum is attached, and there is also a small gift shop and a navigation light at the western end. You get a short visit of about 20 minutes, so plan to focus on the church and the island’s compact setting rather than trying to see every detail.

Entry to the church costs €1.50 and is not included in the tour. The fee is modest, but you should carry some cash or confirm accepted payment methods before you go. If you prefer not to pay, you can still appreciate the island from the boat and enjoy the views across the bay.

This stop gives the trip a calmer finish after the speedboat ride and swimming. The church and museum provide a cultural counterpoint to the Blue Cave’s natural color and Mamula’s military appearance. You see three very different sides of the coast in a short time.

The 20-minute stop is enough for a quick visit, but not for a slow museum inspection. If Our Lady of the Rocks is your main goal, book a dedicated trip to Perast instead. If you want a broad sampler of the bay, this short stop works well.

What the crew adds to the ride

The skipper has a large effect on this experience. The best departures have included clear explanations at each stop, help with photographs, smooth handling through the waves, and a relaxed sense of fun. Andrej is one captain specifically praised for friendly service and useful information, and another skipper kept the ride lively with a varied music selection.

You should expect the amount and quality of commentary to vary. Some passengers received engaging explanations in English, while another found the guide’s speech too fast and difficult to understand. One trip relied partly on a recording rather than direct conversation.

That difference matters because the ride covers several sites quickly. A good explanation helps you understand why Mamula matters, how Our Lady of the Rocks was formed, and what the submarine tunnels were built for. Without it, you may mainly get scenery and a fast boat ride.

The crew has also shown flexibility when weather or cruise schedules caused problems. One departure adjusted plans after a cruise ship changed its timing, and another crew provided rain gear when the weather turned wet. Still, service is not perfectly consistent. Pay attention to safety instructions and speak up if you need help boarding or swimming.

Weather, water, and what to bring

This experience depends on good weather. If poor conditions force a cancellation, you can receive a different date or a full refund. Even when the tour runs, the sea may be rough, especially on the route toward the Blue Cave.

Wear clothing that can handle spray. A swimsuit, towel, sun protection, and secure footwear are sensible if you plan to swim. Bottled water is included, but food and other drinks are not, so eat before departure or bring something suitable if allowed.

Keep loose hats, phones, and sunglasses secure. The boat moves fast, and the wind can be strong. If you are prone to motion sickness, the long outward run and choppy water are worth considering before booking.

The tour suits most people, but swimming and climbing a boat ladder require some physical effort. The operator states that most participants can take part, yet that does not guarantee personal assistance in the water. Families with older children and teenagers may enjoy the pace, while very young children or anyone uneasy on open water may prefer a slower boat.

Is $42.41 good value?

For $42.41, you get three hours of transport and sightseeing across a large section of the coast. You also get bottled water and an English-language service, with no separate charge for the boat ride to the Blue Cave, Mamula, or the submarine tunnels.

The extra cost is small at Our Lady of the Rocks: €1.50 for church entry. Food and drinks are not included, but the short duration means you can manage that easily with a meal before or after.

I consider the price good for a visitor who wants variety and has limited time. You would otherwise need to arrange transport toward the outer bay and a separate visit to Perast or the island. The tour keeps the planning simple and returns you to Kotor on schedule.

The value drops if you dislike fast boats or want long visits at each site. You are paying for coverage and speed, not a slow, detailed tour of every location. If the Blue Cave is crowded or weather shortens the swimming time, the outing may feel more like a scenic transfer with brief stops.

Who should book this Kotor boat tour?

I would choose this trip if you want to see a lot in one morning or afternoon, enjoy being on the water, and like a little speed. It is especially practical for cruise passengers, since the meeting point is close to the waterfront and the tour returns after about three hours.

It is also a good fit for families with teenagers. The boat ride, cave, tunnels, and swimming provide enough change to keep the outing moving. One family with teenagers aged 13 to 18 found the pace a strong match.

You may want another option if you need a beach stop, cannot swim confidently, or want a quiet boat with plenty of room. The Blue Cave can be crowded, the sea can be choppy, and the front seats can be rough. Ask about life jackets, swimming depth, boarding help, and the expected route before departure.

The tour is offered in English and has a maximum group size of 20. Confirmation arrives when you book, and free cancellation is available up to 24 hours before the start time. Changes made inside that 24-hour window are not accepted, so keep your schedule firm.

Should you book the Blue Cave and Mamula tour?

Book it if your ideal outing is a fast, varied coastal sampler. You will see the Blue Cave, Mamula Island, submarine tunnels, and Our Lady of the Rocks, while the ride itself shows off the full sweep of Boka Bay.

Do not book it expecting a private cave visit, a long church tour, or a sandy beach swim. The best reason to go is the combination: dramatic water, old military sites, an unusual artificial island, and a lively speedboat ride at a fair price.

For most active visitors with only a few hours in Kotor, I think the mix is worth it. Just sit toward the back for a smoother ride, bring swim gear only if you are comfortable in open water, and budget the extra €1.50 for the church.

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.

Is transportation included?

The speedboat transportation between the listed sites is part of the experience. Bottled water is included.

Is the Blue Cave entrance fee included?

There is no separate admission ticket listed for the Blue Cave. The cave is reached by boat.

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

Entry to the church costs €1.50 and is not included in the tour price.

Is swimming available?

Swimming may be offered near the Blue Cave or at a nearby cove. Some departures involve swimming from the boat, so ask the crew about the exact conditions before entering the water.

Is the tour offered in English?

Yes. The activity is offered in English.

What happens if bad weather cancels the tour?

If poor weather causes cancellation, you will be offered a different date or a full refund. If the minimum number of participants is not met, you will also be offered another date, another experience, or a full refund.