Kotor: Blue Cave Swim Stop, Lady of the Rocks & Submarine Base

The best blue glow comes after a fast ride. This three-hour Kotor boat tour packs several of the bay’s signature sights into one trip, and I like its excellent mix of scenery and history. I also like the chance to swim near the Blue Cave, a cool reward after cruising past old villages, mountains, forts, and military sites.

The main catch is that the Blue Cave depends on the sea. Rough water can cancel the swim or change the route, and commentary varies by skipper. You should also expect wind, spray, and a boat ladder that may feel awkward if you have limited balance.

Key points before you book

• Blue Cave swim: The cave’s blue water is the star, but the swim may be skipped in rough conditions or look less impressive after 6 pm.
• Our Lady of the Rocks: The €3 admission covers the church and museum, with about 20 minutes on the island.
• Military history: You cruise past Mamula Island and enter a former submarine tunnel in Tivat Bay.
• Fast, scenic format: Three hours is efficient if you have limited time in Kotor, though the ride can feel windy and chilly.
• Small shared boat: Capacity is limited to 25 people, but comfort and viewing space depend on the boat and how full it is.
• Meeting point: Allow extra time to find the operator near Park Slobode, and arrive at least 30 minutes early.

Why this Kotor boat trip is worth considering

Kotor Bay is too large to understand from the old town alone. From the water, you see how steep mountains frame the bay, how small settlements cling to the shoreline, and how the route once connected Venetian ports, naval stations, and fortified islands.

At $39.91 per person, the tour offers a good amount for a half-day outing. Fuel, insurance, water, an English-speaking skipper, and the boat ride are included. You pay an extra €3 for Our Lady of the Rocks, while food and other drinks are not included.

I see this as a strong value for a first visit, especially if you have only one day in Kotor or are visiting from a cruise ship. A private boat would give you more space and control, but it would cost much more. The shared tour keeps the price low while covering places that are difficult to connect on your own.

The rating is 4.8 from 1,914 ratings, and 95 percent of people recommend it. That reflects the tour’s main strength: even when one stop changes, you still get a fast ride through some of Montenegro’s best-known coastal sights.

Starting near Kotor’s cruise port

You make your own way to the meeting point at Park Slobode, close to the Port of Kotor. This is convenient once you find it, but the location can be confusing because the directions may refer to an overpass rather than a bridge.

Give yourself extra time. Roadworks and heavy traffic can slow cars near the park, and the operator’s stall may not be obvious at first. A practical approach is to arrive 30 minutes early, look for the last stall in the park area, and confirm the boat before departure.

The tour returns to the same point, so you do not need to arrange a separate ride back. There are several departure times, which helps if you are fitting the trip around a walking tour, lunch, or a ship schedule.

The boat is a speedboat, not a slow sightseeing vessel. That makes the route exciting and efficient, but it also means strong wind when the boat is moving. Bring a light jacket even in warm weather, and use layers in spring and autumn.

Cruising the Bay of Kotor

The first stretch is a scenic ride of about 20 minutes through the Bay of Kotor. You pass small fishing villages, stone houses, Mediterranean greenery, and steep mountain slopes that rise sharply from the water.

This is the part where the boat itself adds value. Road travel around the bay can be slow, while the boat gives you a clean view of the shoreline without traffic or parked cars getting in the way. The wind can be chilly, but it keeps the ride lively.

The amount of spoken information depends on the skipper. Some guides give personal explanations and local stories, while others rely partly on recorded commentary. Guides named George, Aki, and his partner received particularly warm praise for being friendly, funny, helpful, and careful with safety.

If learning the details of every village matters to you, ask questions early. Some visitors found the commentary too limited, especially when landmarks were not clearly pointed out. The scenery is easy to admire, but a little extra explanation would make the ride more meaningful.

Our Lady of the Rocks and the €3 church visit

The first main stop is Our Lady of the Rocks, or Gospa od Škrpjela, a manmade island near Perast. Local seafarers built it over generations, creating an island that is closely tied to maritime customs and local faith.

You have about 20 minutes here. The small church dates from the 17th century and contains paintings, votive offerings, handcrafted objects, and a museum. The island is compact, so that short stop gives you enough time to hear its origin story and look inside, but not enough time for a slow visit.

Admission is not included and costs €3. Bring cash if needed, though the supplied details do not confirm payment methods. You cannot swim or use a drone at the island.

Dress properly before entering the church. Swimwear is not permitted inside, so you need at least a T-shirt over your bathing suit. Comfortable sandals or shoes are useful because you will move between the boat, the island, and later swimming stops.

The visit can feel rushed, especially if you want to study the artwork. Still, the island is one of the most distinctive cultural stops in the bay, and it adds something that a pure swimming trip would miss.

A brief look at Perast from the water

The boat passes Perast, a former Venetian-era maritime center. Its baroque palaces, old churches, and narrow stone streets give it a very different feel from Kotor’s fortified old town.

You may not get a full walking visit here on the standard route. That matters because Perast deserves more time than a quick boat view if you want to explore its streets or architecture. The advantage is that you see it without giving up the Blue Cave and submarine tunnel stops.

When weather prevents the Blue Cave visit, Perast may become a replacement stop. That is a sensible adjustment, though it does not provide the same thrill as swimming in the cave. If the cave is your main reason for booking, keep your expectations tied to weather conditions.

The Blue Cave swim near Luštica

The Blue Cave, or Plava Špilja, is the tour’s big payoff. Sunlight enters through the cave opening and reflects off the pale bottom, giving the water a strong blue glow. The color can look almost unreal from inside the boat.

The boat reaches the cave by water, then you usually have a short chance to swim nearby or inside, depending on conditions and the boat’s access. The swimming time is around 20 minutes, though several people wished it lasted longer.

This is not a beach stop. You jump or climb from the boat, then use the ladder to get back aboard. The ladder has narrow steps, so water shoes or secure sandals are useful. You should be comfortable in open water and able to manage boarding with crew assistance.

Life jackets are standard equipment and available when needed, but you should ask the crew rather than assume one will be handed to you automatically. The crew can help people in and out of the boat, yet getting aboard still requires some dexterity.

The cave is not guaranteed. High waves, storms, or other difficult sea conditions can make entering unsafe, and the skipper may replace it with another stop. This is an important part of the booking decision. The boat crew has to put safety first, even if the change is disappointing.

Timing also matters. The water and light after 6 pm are not the same as during daylight. Earlier departures are the better choice if the Blue Cave is your priority, especially for the strongest blue effect.

Bring your own towel. Water, sunscreen, and a swimsuit are obvious choices, but a towel is not supplied. A dry bag or waterproof phone case would also be sensible, although those items are not listed as included.

Mamula Island and its uneasy past

The boat passes Mamula Island, a small fortified island at the entrance to the bay. Built as a military fort in the 19th century, it later served as a prison during World War II.

The island is best viewed from the water, with the skipper explaining its military role and wartime past. Make sure you know when the boat reaches it, since one person found it unclear if Mamula had been pointed out.

This is a short sightseeing passage rather than a landing. Its value comes from seeing how the fort used the island’s position to guard the entrance. After the bright water of the Blue Cave, the solid walls of Mamula add a darker historical note.

Inside the former submarine tunnel

The final major stop is a former submarine tunnel in Tivat Bay. To reach it, the boat passes through Verige, the narrowest point of the Bay of Kotor, then enters the bay on the other side.

The tunnel was once a secret military site used during the Cold War. Today, the boat can cruise inside for roughly five minutes while you hear about its purpose and Montenegro’s military past.

Do not expect a long museum visit. This is a quick, atmospheric stop, and the contrast is the point: one moment you are moving through open water, and the next you are inside a dark concrete passage built for naval operations.

The tunnel is especially useful for anyone who wants more than postcard views. It gives the outing a sense of place and shows that the bay was not just a scenic setting. It was also a strategic naval base.

Boat comfort, commentary, and group size

The maximum group size is 25 people. That keeps the tour from becoming a huge excursion, though comfort can vary. One person found the boat too crowded for easy viewing, while others described the boat as well kept, smooth, covered, and comfortable.

Seating and sight lines matter on a boat. If you want clear photos, arrive early and listen to crew instructions rather than trying to claim a risky position. The rear of the boat may offer a more relaxed ride on the return, but seating is not guaranteed.

Music is sometimes part of the experience. Some skippers play a lively playlist, and one guide even timed a song with the approach to the cave. That can make the ride feel fun rather than formal, but it will not suit you if you want a quiet, lecture-style cruise.

The guide style is not fully consistent. You might get an entertaining local storyteller, or you might hear mainly recorded information. I would treat the tour as a scenic boat trip with historical commentary, not as a detailed guided course in Montenegrin history.

What to pack for the three hours

Pack lightly, but cover both a boat ride and a swim.

• Swimsuit and towel
• Sunscreen, sunglasses, and a hat
• Light jacket or warm layer
• Comfortable shoes or sandals
• Flip-flops or water shoes
• Water and any snacks you want
• Camera or phone protection for spray

Spring and autumn can feel cold on the water, even when Kotor is pleasant on land. Summer brings stronger sun, and the boat offers little protection once it is moving.

Children must be accompanied by an adult. Most people can take part, but the boat ladder, uneven movement, and open-water swim require reasonable balance and confidence.

Free cancellation is available up to 24 hours before departure. A cancellation caused by poor weather results in either another date or a full refund. Changes made less than 24 hours before departure are not accepted, so keep that deadline in mind.

Who should book this boat tour?

I would choose it if you want a compact introduction to the bay and do not have time for separate trips to Perast, Our Lady of the Rocks, the submarine tunnel, and the Blue Cave.

It suits active couples, families with older children, cruise passengers, and anyone who enjoys a fast ride followed by a short swim. It is also a good match for photographers, since the route gives you mountain views, old stone settlements, island churches, forts, and unusual military sites in one outing.

You may want a different plan if you dislike wind, boat spray, open-water swimming, or quick stops. It is also not ideal if you want long visits at each landmark or detailed commentary throughout.

Should you book it?

Yes, if you see the Blue Cave as a bonus rather than a guarantee. At $39.91, the combination of boat transport, scenery, Our Lady of the Rocks, Mamula, and the submarine tunnel is good value for a three-hour trip.

Book an earlier departure when possible, arrive 30 minutes ahead, bring a jacket and towel, and wear secure footwear. If the sea is calm and your skipper is as engaging as George or Aki, this can be one of the most memorable short outings from Kotor. If the Blue Cave is closed, you will still get a worthwhile bay cruise, but you should not book this trip expecting a guaranteed swim.

FAQ

How long is the Kotor boat tour?

The tour lasts approximately three hours and returns to the original meeting point in Kotor.

What is the tour price?

The listed price is $39.91 per person. Fuel, insurance, water, and an English-speaking skipper or guide are included.

Is admission to Our Lady of the Rocks included?

No. Entry to the church and museum costs €3 and is paid separately.

Can I swim in the Blue Cave?

Swimming is normally offered during the Blue Cave stop, but the swim can be shortened or skipped when weather or sea conditions are unsafe.

Is the Blue Cave better at a certain time?

The water after 6 pm does not have the same appearance as it does during daylight. An earlier departure is better if the blue color is your main reason for booking.

Do I need to bring a towel?

Yes. A towel is not listed as included, so bring your own if you plan to swim.

What should I wear to Our Lady of the Rocks?

You must wear at least a T-shirt inside the church. Swimwear alone is not permitted.

Where does the tour start and finish?

It starts at Kotor Boat Tours near Park Slobode 1, close to the Port of Kotor, and ends at the same meeting point.

What happens if bad weather cancels the tour?

You will be offered a different date or a full refund if the operator cancels because of poor weather.