From Kotor: Boat to Blue Cave & Lady of the Rocks &Submarine Base

The Blue Cave is the main event: sunlight slips through the sea and turns the water an astonishing shade of blue. You also get a fast, scenic ride across Kotor Bay, a swim stop, the tiny island of Our Lady of the Rocks, submarine tunnels, and a look at Mamula Fortress.

I like the mix of nature and history, especially the chance to ride inside a former military submarine tunnel. I also like the three-hour format, which gives you a taste of the bay without consuming your whole day. The catch is that the ride can be rough, the boat can feel crowded, and Blue Cave entry depends heavily on weather and boat traffic.

Key points to know before booking

• Blue Cave access is never guaranteed: Rough seas, high water, or boat congestion can prevent entry.
• The ride is fast and often bumpy: Sit securely, expect spray, and bring sunscreen.
• Swimming usually happens outside the cave: Captains may use a nearby swimming spot when the cave is unsafe or too busy.
• The submarine tunnel is a memorable stop: You enter the old military passage by speedboat and hear stories about its past.
• The boat may feel full: Actual group sizes described in the trip details range from about 11 to 16 people, while the overall activity allows up to 80 bookings.
• Cruise ship timing needs care: Kotor is a tender port for many ships, and the boat leaves on schedule.

A fast way to see the outer bay

This tour is built around speed. You meet at Hawaii Boat Tours Kotor near Park Slobode, then head out from the harbor in a small motorboat. The trip lasts about three hours, including travel time, so you spend a good portion of it moving between stops.

That format works well if you want several highlights in one outing. You will not get a long, slow harbor cruise with detailed commentary at every bend. Instead, you get a brisk ride, short stops, and a chance to see parts of the bay that are difficult to reach on foot.

The scenery changes quickly. Around Kotor, the mountains rise sharply from the water. Farther out, the bay opens toward the Adriatic, and the ride becomes more exposed. That change is part of the thrill, but it also explains why the boat can bounce more once you leave the sheltered inner bay.

I would arrive early, even though some departures appear to gather well before the stated start time. The operator asks for about 30 minutes before departure, and the meeting area can be busy with several boat companies using nearby docks. If you arrive by cruise ship, allow extra time for tendering. A delay of only a few minutes may mean missing the boat, and last-minute changes are not accepted under the stated policy.

The Blue Cave, beautiful but weather-dependent

The Blue Cave is reached after a long run across the water, often around 45 minutes to an hour depending on conditions and traffic. The cave sits open to the sea, which gives it its magical light but also leaves it exposed to waves.

Inside, sunlight enters through an underwater opening and gives the water its glowing blue color. The effect is strongest when the sea is calm and the light is right. This is the moment that makes the long ride worthwhile.

You may have about 30 minutes allocated to the stop, but that does not mean 30 minutes inside the cave. Several boats can arrive at once, and the captain may stay only a few minutes before moving out. In especially busy periods, you may not enter at all, even if the weather is otherwise fine.

Sea conditions can also close the cave. Rain the night before, rough water, high waves, or a high water level may make the entrance unsafe. In that case, the boat may go to the entrance, turn around, and stop at a nearby swimming area instead.

That alternate swim can still be enjoyable. The water is clear and scenic, but it is not the same as swimming inside the glowing cave. If Blue Cave access is the single reason you want this trip, keep that uncertainty in mind before paying.

Bring a swimsuit, towel, sunscreen, and something to protect your phone. You may get wet from spray even before the swimming stop. Snorkeling equipment may be limited, so bring your own mask if that matters to you.

Our Lady of the Rocks and a short look at Perast

The boat then heads toward Our Lady of the Rocks, the small man-made island opposite Perast. Its church and island setting make this one of the most distinctive sights in Kotor Bay.

The stop lasts about 20 minutes. That is enough to see the island and church area, though it is a compact place and can feel crowded when several boats arrive together. The island is tied to local legend and centuries of seafaring tradition, so it adds a human story to the day’s natural scenery.

The itinerary also describes a cruise past Perast, the old town on the mainland. Perast has Baroque buildings, old palazzos, Catholic churches, and defensive towers along a very short waterfront road. You should not expect a full walking tour here. The boat offers a view of the town and its architecture rather than time to explore every lane.

That distinction matters. If you want to visit the church interior or spend time in Perast itself, plan a separate trip by road or local boat. On this excursion, the stop is brief and the emphasis remains on seeing several sights from the water.

Inside the former submarine tunnels

The submarine tunnel is one of the most unusual parts of the outing. These military passages were cut into the mountains so submarines could hide from view. The speedboat enters the tunnel, giving you a close look at the narrow opening and the solid stone walls inside.

The stop lasts about 10 minutes, but it has more character than its short duration suggests. The dark passage, the boat’s engine echo, and the sense of entering an abandoned military shelter make this feel different from the usual bay cruise.

Commentary can vary by captain. Some departures include stories about the tunnels, while others provide only limited information about the sites. If your captain is giving a fuller explanation, this is a good time to ask questions. The tunnel is easy to photograph, but the light is low and the boat may not remain inside for long.

I especially like this stop because it gives the tour a sense of place. You are not simply looking at pretty water and old buildings. You are seeing a practical remnant of Montenegro’s military past, built into the coast itself.

Mamula Fortress from the water

The boat makes a short stop of about 10 minutes near Mamula Fortress on the island of Lastavica. The circular fortress was built as a defensive structure and later used as a prison island.

You view the fortress from the boat rather than taking a long shore visit. The captain may explain its wartime and prison history, but the amount of commentary depends on the departure. The stop is best understood as a photo opportunity and brief historical introduction.

Mamula is not as visually delicate as Perast or as dramatic as the Blue Cave. Its appeal is its isolation and severe stone form. From the water, you can see how the fortress controlled the approach to the bay.

Since the stop is short, do not expect time to inspect every wall or room. If you are interested in military sites, it is a worthwhile addition. If your priority is swimming or old-town architecture, it is a smaller part of the day.

What the boat ride feels like

A speedboat makes the route possible in three hours, but speed has tradeoffs. The ride can be bumpy, especially beyond the more sheltered parts of Kotor Bay. Boat traffic can add extra chop, and some people may find the repeated bouncing uncomfortable.

You should sit securely and keep loose belongings close. One account describes a passenger being struck by a boat bumper, while other accounts praise the captain’s handling in rough water. Those contrasting experiences point to the main issue: conditions and driving style can make a big difference.

Some departures have had around 11 to 14 people aboard, while other accounts describe 16 people and limited seating. The operator states that boats have licensed capacities, but the comfortable space can feel smaller than the legal capacity suggests. If you want room to stretch, a private boat is likely worth the extra cost.

Shade is not guaranteed at every departure, and one trip began without the sun cover in place. Take sunscreen and a hat. A light jacket is useful in May or on a windy day, even when the air feels warm on land.

Water is not advertised as included, so carry your own bottle. There have also been reports of a fuel stop adding time, though this should not be treated as a normal feature of the trip. The stated duration is approximately three hours, and actual time can shift with sea conditions, traffic, and operational delays.

Commentary and the captain can shape the day

The quality of guiding appears to vary. Some departures have a captain who explains the sights, handles the waves well, and keeps the schedule on track. Captain Boben is specifically praised for making a family group’s outing enjoyable. Other accounts describe little commentary, recorded information, or a language gap.

That matters because the sights pass quickly. Without explanation, the submarine tunnels and Mamula Fortress can look like brief photo stops rather than meaningful historical places. If you care about context, ask at the start how much narration will be provided.

The captain’s primary job is boat handling and safety, not delivering a full walking-tour lecture. That distinction helps set expectations. You are booking an active boat excursion with historical highlights, not a detailed cultural tour of Montenegro.

Safety feedback is also mixed. Many departures describe skilled handling and careful navigation around other boats. A few complaints raise concerns about speed, missing safety instructions, or how minor injuries were handled. I would listen carefully to the pre-departure instructions, locate the life jackets, and speak up if the ride feels too fast or uncomfortable.

Is $32.53 good value?

At $32.53 per person, the tour is priced as an affordable shared boat outing. You get several major sights, a swimming opportunity, and transportation across a large area of the bay without arranging separate boats.

The price is strongest when the Blue Cave is accessible, the boat is comfortably filled, and the captain provides useful commentary. On a calm day, you get a lot for three hours. The submarine tunnel alone gives the route a point of difference from a basic scenic cruise.

Value drops if the cave is closed, the ride is delayed, or the boat feels packed. You still see the bay, Our Lady of the Rocks, the submarine tunnel, and Mamula, but the Blue Cave is the headline attraction. If it is missed, the experience can feel less distinctive for the money.

A private boat costs more but may solve the main complaints: limited seating, lack of personal space, and a less flexible pace. For a family or a group splitting the cost, that upgrade could be sensible. For one or two people watching the budget, this shared trip remains a reasonable way to cover a lot of ground.

The score of 4.9 from 1,104 ratings and a 97 percent recommendation rate suggests many people enjoy the basic experience. Still, the low ratings point to real risks, especially around crowding, weather, timing, and communication. I would treat the headline rating as a guide, not a guarantee.

Who should choose this excursion?

I would recommend it to you if you:

• Want a short, active outing rather than a full-day cruise.
• Enjoy fast boats, sea spray, and a little bouncing.
• Want several attractions in one trip.
• Are happy to swim outside the Blue Cave if entry is not possible.
• Have limited time in Kotor and want to reach the outer bay.
• Value scenery and unusual sites more than long historical talks.

I would think twice if you:

• Get motion sick or have back problems.
• Need a smooth, quiet boat ride.
• Want guaranteed cave swimming.
• Expect a detailed guide throughout the journey.
• Dislike crowded boats.
• Are arriving on a cruise ship with a tight port schedule.

The tour is generally suitable for most people, and service animals are allowed. Children have taken part, including a seven-year-old and a 13-year-old, but the fast ride and rougher water still require good judgment from parents.

Cancellation is free up to 24 hours before the start time. Changes made inside that window are not accepted, and poor weather may lead to a new date or a full refund. The operator can also cancel if the minimum number of people is not reached.

Should you book the Blue Cave boat tour?

Book it if you want an energetic three-hour sampler of Kotor Bay and you can accept uncertainty. The best version includes calm seas, a manageable group, a confident captain, a proper Blue Cave visit, and enough time for a swim. The tunnel, Our Lady of the Rocks, and Mamula give the trip more substance than a simple cave ride.

I would not book it for a guaranteed Blue Cave swim, a quiet cruise, or a carefully narrated history tour. If you are visiting by cruise ship, leave a generous buffer for tendering and reach the meeting point early. If the cave matters more than the low price, compare private options and check the forecast before committing.

For most independent visitors with flexible timing, this is a good-value way to see the outer bay. Just board knowing that the sea, the crowds, and the captain will shape the day as much as the advertised route.

FAQ

Where does the boat tour start?

It starts at Hawaii Boat Tours Kotor near Park Slobode 1 in Kotor, Montenegro.

Where does the tour end?

The activity returns to the same meeting point in Kotor.

How long does the experience last?

The tour lasts approximately three hours, including travel time between stops.

How much does the tour cost?

The listed price is $32.53 per person.

Is the Blue Cave always open to the boat?

No. Entry depends on weather, water level, waves, and boat traffic. The captain may use a nearby swimming location if entering is unsafe or impractical.

Can you swim inside the Blue Cave?

Swimming inside is not guaranteed. Some departures swim at a nearby spot outside the cave instead.

How long is the stop at the Blue Cave?

The planned stop is about 30 minutes, but the actual time inside can be much shorter when the cave is crowded.

What other places does the tour visit?

The route includes Our Lady of the Rocks, a cruise past Perast, former submarine tunnels, and a short stop near Mamula Fortress.

Is the tour offered in English?

Yes. The experience is offered in English, though the amount of spoken commentary can vary by captain.

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.