Tivat: Blue Cave and Old Submarine Tunnel Speedboat Tour

Blue water, fast boat, big views. This 100-minute trip from Donja Lastva packs Boka Bay, Mamula Island, the Blue Cave, and a former submarine tunnel into a short coastal outing. I like the easy waterfront meeting point at St. Roko church and the chance to swim in the cave’s glowing water. I also like that fuel, bottled water, snorkeling gear, and rain coats are included, so the $41 price covers the useful basics.

The tradeoff is time. You get only about 20 minutes at the Blue Cave and five minutes at the submarine tunnel, and one October booking found the whole outing rushed. This is best understood as a quick scenic speedboat ride with a swim, not a slow sightseeing cruise.

Quick reasons to consider this boat trip

• The Blue Cave is the main event: You have about 20 minutes to swim and snorkel in water turned bright blue by reflected sunlight.
• The ride covers several kinds of scenery: You pass coastal villages, old houses, churches, palaces, mountain slopes, Luštica Peninsula, and Mamula Island.
• The submarine tunnel adds a military-history stop: You pause for five minutes at a Yugoslav-era tunnel cut into Luštica’s steep shore.
• The meeting point is simple: The boat collects you from the dock in front of St. Roko church in Donja Lastva, a suburb of Tivat.
• It is good value for a short outing: At $41 per person, the cost includes fuel, water, snorkeling equipment, and rain coats.
• The ride is genuinely fast: You spend much of the tour moving between stops, which makes it exciting but leaves little spare time.

Starting at St. Roko church in Donja Lastva

You meet the boat at the dock in front of St. Roko church in Donja Lastva. This is not central Tivat proper, so check your route to the suburb before setting out. Hotel pickup and drop-off are not included, and the boat is scheduled to collect you at the waterfront meeting point.

That location works well once you arrive. There is no long check-in routine or ticket queue to deal with. You simply need to be at the dock at the expected time, ready to board. The operator, Sea Horizon, uses English and Serbo-Croatian, and one recent booking described clear WhatsApp contact and convenient organization before the trip.

The boat ride itself is part of the attraction. This is not a large sightseeing vessel where you sit quietly behind glass. You are on a speedboat, so expect wind, spray, engine noise, and quick changes in scenery. That makes the trip fun for you if you enjoy the feeling of moving across open water. If you want a quiet cruise with long commentary, this probably is not the right format.

The first 35 minutes through Boka Bay

The opening ride lasts about 35 minutes, broken into a 20-minute speedboat section and a further 15-minute run toward the cave. It gives you a broad look at Boka Kotorska, one of the Adriatic’s longest and deepest bays. The bay is often called Europe’s southernmost fjord, although its shape comes from submerged river valleys rather than the same glacial process that formed Norway’s fjords.

Keep your eyes on the shoreline. The route passes small settlements with stone houses, churches, palaces, and other buildings pressed between the mountains and the sea. You get the pleasure of seeing the bay as a whole, with steep slopes rising behind calm water and small coastal communities appearing around each bend.

This part is scenic rather than highly narrated. The information provided does not promise a long guided explanation at every sight, so I would treat the boat ride as a visual introduction. Bring your camera, but keep it secure. On a fast boat, spray and wind are practical concerns, especially near the outside seating areas.

You also get views toward Kotor Old Town from the water. The exact viewing angle can vary with the route and conditions, but the bay setting gives you a different sense of the old city than a street walk does. Instead of focusing only on walls and lanes, you see how the settlement fits into the larger coastal setting.

Passing Mamula Island and Luštica Peninsula

The boat passes Mamula Island during the outward journey, with about three minutes set aside for that section. Mamula sits at the entrance to Boka Bay and is known for its round stone fortress. You should think of this as a passing view, not an island visit. There is no extended stop or time to go ashore.

That limitation matters. If Mamula is your main interest, this tour will only give you a glimpse. If you want a broader sense of the coast and are happy to see several places from the water, the pass-by works well. The speedboat lets you cover more ground than a walking tour, and the approach from the sea gives the fortress a strong visual setting.

Luštica Peninsula provides the backdrop for the most unusual stops. Its steep banks hold both the Blue Cave and the old submarine tunnel, so the route connects natural scenery with military remains in a compact way. I like that combination because the outing is not just a swim trip. You get a little coastal geography, a little twentieth-century history, and plenty of open-water scenery.

Swimming in Montenegro’s Blue Cave

The Blue Cave receives about 20 minutes. This is the one stop where you leave the boat for a direct experience of the water. Snorkeling equipment is included, and the stop is designed for swimming and snorkeling in the cave itself.

The cave covers roughly 300 square meters. Its arched ceiling rises about 25 meters, and the water is generally three to four meters deep inside. It has two entrances, allowing sunlight to enter and reflect off the walls and water. That light creates the famous blue glow, making the surface appear to shine from below.

Photos rarely explain why the cave feels different from an ordinary swimming stop. The color depends on sunlight, water conditions, and the angle from which you see it. You might find the blue strongest near the entrances or along the cave walls. The effect is natural, not produced by lighting.

Twenty minutes is enough for a swim and a look around, but it is not generous. You will need to board promptly when the captain signals. If you want to float, snorkel, take photographs, and admire the cave without watching the clock, the stop may feel short. One recent booking specifically found the trip rushed, and that is the main practical criticism to keep in mind.

Still, this is where the tour earns much of its price. A separate cave excursion would take more time and might cost more, while this trip combines the Blue Cave with several other sights. I would bring a swimsuit, towel, sunglasses, and sun cream during summer. A waterproof phone case is not listed as included, so protect your phone if you plan to take pictures near the water.

The five-minute stop at the former submarine tunnel

On the return leg, the boat makes a five-minute photo stop at one of the old submarine tunnels on Luštica. Three such tunnels were built during Yugoslavia. They were used to hide and repair submarines and ships, and they were cut directly into the steep coastal banks.

The tunnel described here can reach about 50 meters in length and seven meters in width. The average water depth inside is around eight meters, increasing to about 30 meters near the exit. Those measurements help explain its purpose: this was more than a small harbor or simple mooring shelter. The tunnel offered a concealed place for military vessels.

You should expect to view the tunnel from the boat rather than explore it on foot. Five minutes is enough for photographs and a quick explanation, but not for a detailed historical visit. That short stop works best as a surprising extra. You get a glimpse of a piece of Cold War-era infrastructure that many people would miss if they only came for the cave.

If military history is your chief interest, look for a longer, dedicated visit elsewhere. On this tour, the tunnel is a compact photo stop between the main swimming experience and the return ride.

The return to Donja Lastva

After the tunnel, you have about 15 minutes on the speedboat back to Donja Lastva. The published timing also allows roughly 10 additional minutes to enjoy the views before returning to the starting point, though exact timing can depend on the boat and sea conditions.

This final stretch gives you a last look at Boka Bay from the water. It is also when you may appreciate the route’s compact design. In 100 minutes, you see the bay, Mamula Island, Luštica, the Blue Cave, and a submarine tunnel without committing half a day.

The downside is simple: there is little room for delays. Boarding, swimming, photographs, and travel time all have to fit into a tight schedule. A calm day with smooth coordination should feel energetic and efficient. A crowded cave, slower boarding, or rougher conditions could make the schedule feel even more compressed.

Is $41 good value?

At $41 per person, I think the tour offers solid value if you want several highlights in one short outing. Fuel alone is included, along with bottled water, snorkeling equipment, and rain coats. You are also paying for a speedboat route that reaches places not practical to cover quickly on foot.

The value is strongest for people with limited time in Tivat. You can sample the coastline, see Mamula from the sea, swim in the Blue Cave, and photograph a former submarine shelter before returning to the same dock. It is an efficient way to add a sea excursion without losing a full day.

The value is weaker if you measure a tour by time spent at each attraction. Twenty minutes in the cave and five minutes at the tunnel will not satisfy you if you prefer slow exploration. The trip is designed around movement and variety, not long stays.

A rating of 4.8 from 10 posted ratings reflects the strong overall response, but the lower 3 out of 5 assessment points to a real issue rather than a mystery. Some people will love the speed and variety. Others will feel hurried. The right choice depends on which group sounds more like you.

Who will enjoy this best?

I would recommend this tour to you if you enjoy fast boat rides, coastal views, swimming, and a compact schedule. It suits a first visit to Tivat when you want a quick introduction to the bay rather than a full-day cruise.

It also fits couples, friends, and active families who can swim and are comfortable boarding a speedboat. The snorkeling equipment makes the Blue Cave more than a look-from-the-boat stop, although the tour data does not specify age limits or swimming requirements.

You may want a different option if you dislike wind and spray, need a great deal of time at each stop, or mainly want to explore Kotor Old Town on foot. Kotor is viewed from the water here, not visited as a walking stop.

The boat received especially warm praise for its speed, music, new appearance, pleasant captain, and smooth organization in one September booking. Those details suggest the atmosphere can feel modern and relaxed, but music and boat condition may vary by departure. Do not book this expecting a silent nature cruise.

Practical tips before you go

Wear your swimsuit under your clothes if you plan to swim. Bring a towel, sunglasses, and sun cream in summer. In colder weather, choose warmer clothes and a cap, since the speedboat ride can feel cool even when the shore is mild.

Keep your belongings compact and secure. The tour includes rain coats, which are useful protection from spray as well as sudden weather, but the boat remains an open-water ride. Bottled water is supplied, so you do not need to buy a drink for the trip.

Arrive at the dock in front of St. Roko church with enough time to find the correct waterfront spot. Since hotel transfers are not included, allow extra time to reach Donja Lastva. The operator offers free cancellation up to 24 hours before departure and lets you reserve first and pay later, which helps if your bay plans depend on weather.

Should you book the Blue Cave speedboat tour?

Book it if you want a short, lively coastal trip with one memorable swim. The Blue Cave is the star, while Mamula, Kotor views, Luštica, and the submarine tunnel give the ride more variety than a simple cave outing.

Skip it if you want long stops, extensive history, or a leisurely cruise. At $41, the tour is good value for seeing several places quickly, but the pace is part of the bargain. For many people based in Tivat, that is exactly the point: a fast boat, striking bay views, and blue cave water before lunch or dinner.

FAQ

Where does the tour start?

It starts at the dock in front of St. Roko church in Donja Lastva, a suburb of Tivat.

How long does the tour last?

The experience lasts 100 minutes.

How much time do I get in the Blue Cave?

You get about 20 minutes for swimming and snorkeling in the Blue Cave.

Is snorkeling equipment included?

Yes. Snorkeling equipment, bottled water, fuel, and rain coats are included.

Does the tour visit Mamula Island?

The boat passes by Mamula Island during the route. The tour information does not include time to go ashore there.

How long is the submarine tunnel stop?

The boat makes a five-minute photo stop at a former submarine tunnel on Luštica.

Is hotel pickup included?

No. Hotel pickup and drop-off are not included. You need to reach the meeting point in Donja Lastva yourself.

What languages are available?

The driver speaks English and Serbo-Croatian.