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

The best part of this Kotor boat trip is the Blue Cave, where sunlight turns the water an intense blue and you can jump in for a short swim. The ride also packs in Our Lady of the Rocks, Perast, the former submarine tunnels, and a pass by Mamula Island in about three hours.

I like the efficient route and the chance to see so much of the bay without arranging several separate outings. I also like the friendly crews, who have handed out jackets in windy weather and helped people on and off the boat. The main caution is that this is a speedboat, not a leisurely harbor cruise. It can be windy, chilly, and bumpy, and the Blue Cave may be skipped if the sea turns rough.

Key points to know before you book

• The Blue Cave swim is the star attraction: Sunlight reflecting from the pale bottom creates the famous blue glow, but swimming is brief and weather dependent.
• Our Lady of the Rocks costs extra: Allow €3 for the church and museum, and wear at least a T-shirt inside.
• The boat covers a lot of ground: You cruise through Kotor Bay, pass Perast and Mamula Island, cross Verige Strait, and reach Tivat Bay.
• The former submarine tunnel is a quick but unusual stop: Expect about five minutes at this Cold War-era military site.
• The meeting point can take time to find: Arrive 30 minutes early at Park Slobode near Kotor’s port.
• Bring a jacket and towel: Wind on the moving boat can feel cold, and towels are not supplied.

Why this three-hour Kotor boat trip works

At $39.91 per person, this is a strong-value way to see several of the Bay of Kotor’s main sights in one outing. Fuel, water, insurance, and an English-speaking skipper are included, while the only stated admission fee is the €3 charge for Our Lady of the Rocks.

The value comes from the route. You are not simply taken to one swimming spot and returned to town. The boat threads through the fjord-like bay, passes old coastal settlements, crosses the narrow Verige Strait, and reaches open water near the Blue Cave. For a short stay in Kotor, that saves time and removes the need to organize separate boat rides.

The trip is best understood as a lively sightseeing ride with several short stops. It is not a full guided tour of every site, and the amount of spoken explanation can vary. Some skippers provide personal commentary, while others rely partly on recorded information. If you want detailed history at every turn, this may feel light. If you want scenery, speed, and a refreshing swim, the format makes good sense.

The boat holds a maximum of 25 people. That keeps the cost down, but it also means this is not a private or especially quiet outing. Seating and viewing can feel less comfortable when the boat is full, particularly during the fast sections.

Setting out through the Bay of Kotor

You meet the crew at the Kotor Boat Tours and Blue Cave stand near Park Slobode, close to the port. The location is practical once found, but the directions can be confusing. Arrive at least 30 minutes early, especially if you are coming from a cruise ship or arriving by car.

The park area can have heavy traffic and roadworks. One useful orientation tip is to leave the port area, turn right outside the station, cross the overpass, and look for the vendor in the park. Give yourself time to locate the correct stand rather than arriving at the last minute.

Once aboard, the opening cruise offers some of the finest views of the bay. You pass fishing villages, stone houses, churches, wooded slopes, and dramatic mountain walls rising straight from the water. The first scenic section lasts about 20 minutes, giving you time to settle in and take photographs.

A speedboat changes the feel of the bay. You cover distances quickly, and the wind increases as the boat gathers speed. On warm summer days, that breeze is welcome. In spring, autumn, or on a cloudy day, it can be surprisingly cold. Bring a cardigan, light jacket, or other warm layer even if the weather looks pleasant on shore.

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 islet near Perast. Local seafarers built it up over generations by placing rocks and sinking old vessels at the site. That origin gives the island a strong connection to the bay’s maritime traditions.

You have about 20 minutes here. The church dates from the 17th century and contains paintings, votive offerings, and handcrafted objects. A small museum adds context about the island, the church, and local seafaring life.

The €3 admission is not included, so carry some money for entry. The visit is short, which is enough for a quick look but not enough for a long museum visit or a slow examination of every painting. If you enjoy church interiors and local stories, you may wish the stop lasted longer.

Dress properly before stepping inside. Swimwear alone is not allowed in the church, so keep a T-shirt or cover-up handy. Swimming and drone use are forbidden at the island.

The crew may point out details as you go, but the level of explanation can vary. Some guides, including captains such as George and Aki mentioned in the tour information, have been praised for being funny, attentive, and helpful. On other departures, commentary may be brief or partly recorded. I would read a little about the church before boarding if this stop matters greatly to you.

Perast from the water

The boat passes Perast rather than treating it as a full walking stop. That is a sensible choice for a three-hour route, but it is important to know what you are getting.

Perast was once a Venetian maritime center. Its baroque palaces, old churches, narrow stone lanes, and waterfront setting make it one of the most appealing towns in the bay. From the boat, you get a broad view of its architecture and position between the mountains and the water.

This brief pass-by is useful if you have limited time, but it will not replace a visit on foot. If Perast is high on your list, plan a separate visit or look for an outing with longer time there. The boat trip gives you the postcard view, not the town experience.

The former submarine tunnel in Tivat Bay

After passing through Verige Strait, the narrowest part of the Bay of Kotor, the boat enters Tivat Bay. Here you reach a former submarine tunnel built as a secret military facility.

The tunnel is cut into the rock and was once used to hide submarines from view. Its Cold War setting adds a different note to the trip. Instead of churches and old villages, you see a stark reminder of Montenegro’s military past.

The stop lasts about five minutes. That is enough to cruise into the tunnel area and hear the basic story, but not enough for a detailed visit. The boat does not turn this into a long museum stop. Think of it as a quick, atmospheric encounter with an unusual piece of military infrastructure.

It is also one of the places where the boat itself matters. A road trip cannot offer the same approach from the water. The tunnel’s concealed entrance makes more sense when you arrive by boat and see how the coastline hides it.

Mamula Island and its wartime past

The route passes Mamula Island, a small fortified island at the entrance to the bay. Built in the 19th century, it later served as a prison during World War II. The round fortress, stone walls, and isolated position make it easy to understand why the site was chosen for military use.

You do not normally get a long landing here. The value is in seeing the fort from the water while the skipper explains its role in the area’s military story.

Pay attention when the island comes into view. If the guide gives little commentary, it may not always be clear which island you are passing. You can ask the crew to point it out. That small step helps you get more from the route.

The Blue Cave swim stop

The Blue Cave is the main reason many people choose this trip. It can only be reached by boat, and sunlight entering the opening reflects off the pale bottom, giving the water its bright blue color.

The boat may enter the cave or stop outside it, depending on the sea. When conditions are good, you get a short chance to swim in the clear water. The swim is refreshing rather than lengthy, so do not book this expecting a full beach afternoon.

There is no beach. You jump from the boat or use the ladder to enter the water, then climb back aboard. The ladder has narrow steps, and getting in and out requires reasonable balance and mobility. Water shoes or secure sandals can help, especially if your feet are sensitive.

Life jackets are standard equipment on the boat and available when needed. Ask the crew if you want one. If you are not a confident swimmer, do not feel pressured to enter the water. The boat ride and cave view are still worthwhile, and safety should come first.

The color is strongest in daylight. The tour information notes that after 6 pm the water does not look the same, so an earlier departure is the smarter choice if the Blue Cave is your priority. Weather can also change the experience. High waves or storm conditions may make entering the cave unsafe, and the crew may replace the stop with another sight, such as more time around Perast.

That can be disappointing, especially if swimming was the main purpose of your booking. Still, skipping the cave in rough conditions is the right call. The open water around the cave can become choppy, and a speedboat ride is not a good place to take chances.

What the ride feels like on board

This is an active boat outing, not a calm sightseeing cruise. The boat moves quickly between stops, and wind can be strong even under a sunny sky. Several departures have provided jackets when conditions turned chilly, but you should bring your own layer.

The crew generally helps with boarding and the ladder. That matters at the swim stop and at Our Lady of the Rocks, where stepping on and off a small boat may require care. The tour is suitable for most people, but anyone with limited balance, mobility concerns, or discomfort on moving boats should think carefully before booking.

Music may be part of the atmosphere. Some departures have featured upbeat playlists, which suits the fast ride but may not appeal to anyone seeking a quiet nature trip. The level of guide interaction also differs. Captains such as George have been praised for humor and local stories, while some departures have offered little beyond recorded commentary.

Bring water and any snacks you want. Food and drinks are not included, although water is provided. Pack sunscreen, sunglasses, a hat, swimwear, a towel, comfortable shoes, and flip-flops. A waterproof phone pouch is sensible, though it is not listed as supplied.

Timing, weather, and making the most of the price

The tour lasts about three hours and returns to the same meeting point. Several departure times make it easier to fit around a day in Kotor, but check the schedule carefully if you are visiting from a cruise ship. A late ship arrival or a traffic delay can put the start time at risk.

The operator may place you on a later departure if you arrive late and space is available, but do not rely on that. Missing the boat can mean waiting for the next slot.

Weather is the main variable. The experience runs only in suitable conditions, and poor weather can lead to a new date or a full refund. On the water, even a generally pleasant day can bring strong wind or waves. Keep your plans flexible if the Blue Cave is essential.

At this price, the trip gives you a lot: a fast cruise through the bay, an island church and museum, a military tunnel, a view of Mamula, and a possible cave swim. The tradeoff is limited time at each stop and a group setting. A private boat would give you more control, but it would cost more.

Who should book this Kotor boat tour?

I would choose this outing if you have only one day in Kotor and want to see the bay from the water. It suits people who enjoy quick stops, dramatic scenery, a little history, and the option of swimming.

It is also a good fit for families with older children, provided an adult stays with each child and everyone is comfortable boarding a speedboat. Children must be accompanied by an adult.

I would look elsewhere if you want long visits at museums, a quiet sailing trip, or guaranteed time in the Blue Cave. I would also avoid booking it as your only plan if you cannot manage a ladder, narrow boat steps, wind, or moderate motion on the water.

Should you book it?

Yes, if you want an energetic three-hour introduction to Kotor Bay at a reasonable price. The scenery is the constant reward, while the Blue Cave provides the memorable highlight when conditions cooperate.

Book it with realistic expectations: the church visit is short, the submarine tunnel is very brief, commentary may vary, and the swim is optional rather than guaranteed. Arrive early, bring a jacket and towel, and choose a daytime departure if the blue water matters most. For a compact sightseeing ride with several distinctive stops, this is an easy choice.

FAQ

How long does the Kotor boat tour last?

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

What is included in the price?

The price includes an English-speaking skipper and tour guide, fuel, insurance, and water. Food, other drinks, and the €3 admission to Our Lady of the Rocks are not included.

Can I swim in the Blue Cave?

You can swim when sea and weather conditions allow. The swim is usually a short stop, and the Blue Cave may be skipped if waves or other conditions make it unsafe.

Is the Blue Cave better during the day?

Yes. The tour information notes that the water does not have the same appearance after 6 pm, so a daylight departure is preferable for the blue glow.

What should I bring?

Bring swimwear, a towel, sunscreen, sunglasses, a sunhat, comfortable shoes or sandals, flip-flops, and a jacket. The boat can feel windy and cold, particularly in spring and autumn.

Is admission to Our Lady of the Rocks included?

No. Entry to the church and museum costs €3. Swimwear is not permitted inside, so you need at least a T-shirt.

What happens if bad weather cancels the tour?

If poor weather forces cancellation, you can be offered another date or a full refund. You can also cancel for a full refund if you cancel at least 24 hours before the scheduled start time.