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

This tour is interesting because it compresses a lot of Montenegro drama into a tight speedboat loop: churches on a rock islet, Cold War submarine leftovers, WWII fort ruins, and that famous blue water in the Blue Cave. In about 3 hours, you get the Bay of Kotor story told from the water, not from a bus window.

I especially like the way the stops are stacked for variety. You’ll walk the manmade island at Our Lady of the Rocks (with its small museum and paintings), then you’ll switch gears and cool off with a swim outside the Blue Cave. I also like that names pop up in the experience, with captains such as Captain Aki and guides like George bringing the route to life with real history, not just generic chatter.

One possible drawback to plan for: the ride depends on good weather. If the sea is choppy or conditions are challenging, the Blue Cave swim part can be skipped for safety, and getting on and off the boat ladder takes some balance.

Key takeaways before you go

• Blue Cave swimming is a highlight, but it depends on sea and weather conditions
• Our Lady of the Rocks is more than a photo stop, you visit the church and small museum on the islet
• You get Cold War context cruising toward the former submarine tunnels at Verige
• Mamula Island is a quick but memorable WWII story when you pass by the fortress island
• The tour is short and fast, so bring layers for wind and plan for a ladder entry during the swim

Meeting by the Port of Kotor, then holding on for speedboat views

Your day starts at Kotor Boat Tours & Blue Cave, Our Lady of the Rocks & Submarine Park Slobode 1, Kotor. It’s close to the Port of Kotor, so I’d keep it simple and arrive early. Plan on being there at least 30 minutes before departure, because finding the exact stall at the park can feel a bit chaotic.

Once you board, you’ll settle into the pace of a speedboat. That matters, because the Bay of Kotor is all about tight angles and sudden sightlines. You cruise along the shoreline past Mediterranean greenery and historic fishing villages, and the speed helps you see more of the bay without losing hours to slow local transport.

Expect wind. Even if the day looks sunny on shore, the boat movement can get chilly. One smart move: pack a jacket or shawl, even in shoulder season. Some crew have even helped with wind on cooler days, but you should not count on it.

Our Lady of the Rocks: church rules, what you’ll actually see, and how to prepare

The first land-based stop is Our Lady of the Rocks, also known as Gospa od Skrpjela. This is a manmade islet built by generations of local seafarers, so the place feels less like a random monument and more like maritime labor turned into worship.

You’ll have about 20 minutes to explore. During that time, you can step into the church and view the small museum plus paintings. Even the way people collect and display votives and handcrafted items gives you a better sense of local tradition than you’d get from just watching from the boat.

Do read the practical rules before you show up:

• You cannot enter the church in swimwear. You need at least a T-shirt on.
• It’s also stated that swimming is forbidden at Our Lady of the Rocks.
• There’s a drone ban at this stop.

So, how do you handle this on a boat day? Don’t wait until you arrive in your swimsuit. Wear swimwear under something you can pull on quickly, bring a T-shirt you don’t mind getting damp, and keep your towel nearby so you can dry off fast after the island part.

The short visit time is a real consideration. If you love museums, 20 minutes may feel tight. On the other hand, this tour balances the church with the rest of the bay, so the pacing usually works for people who want both culture and sea time.

Perast and the Venetian-era coastline you can understand from the water

You won’t stop in Perast, but you cruise past it. Perast is described as a Venetian-era maritime hub, with baroque palaces, old churches, and narrow stone streets. From the boat, that tells a clear story: this is what sea power looked like when ships, not roads, were the main connection.

Why this is worth it: it adds context between your big anchor stops. When you see Perast from the water, the church-and-islet parts feel connected to the life of boats and trade that made these places matter.

It’s also a nice warm-up. By the time you reach Our Lady of the Rocks, you’ve already started collecting recognizable coastline shapes, which makes the whole bay feel more navigable in your head.

Verige strait cruising to the former submarine tunnels

After passing the Verige strait and entering Tivat Bay, you’ll reach the former clandestine submarine base area. You won’t have a long walk here. Instead, the value is in the cruise-through narrowest point of the Bay of Kotor, Verige, and then continuing into the Bay of Tivat.

This stop is short, about 5 minutes for the tunnel area. The former submarine tunnels are now open to visitors, and you’ll hear what made this a top-secret Cold War site. Even with the brief time, the context is strong because the physical setting is narrow and strategic, so the story feels grounded rather than abstract.

This is also where the guide commentary really changes the experience. Some captains use audio recording for portions of the trip, and some provide more live explanation. Either way, you’ll get a sense of how the bay was used as a defensive geography.

Passing Mamula Island: quick cruise-by, big WWII mood

Then comes Mamula Island, a fortress island with a dramatic past. Built in the 19th century as a military fort, it later became a prison during World War II. On this kind of tour, you’re not landing on the island. You see it as you cruise by.

Still, it’s a useful contrast. Our Lady of the Rocks reflects maritime faith and local craftsmanship. The submarine base reflects military secrecy. Mamula reflects occupation and confinement. Together, they make the bay feel like a corridor that different powers tried to control over centuries.

If you prefer hands-on experiences, keep expectations realistic: it’s a pass-by. But if you like history told through what you can see from the waterline, this stop delivers.

The Blue Cave swim at Plava Spilja: timing, ladder entry, and what to pack

The main water moment is the Blue Cave (Plava Spilja). This is the last stop and usually the one people remember most. The cave gets its name from brilliant blue water, caused by sunlight reflecting off the white-pebble bottom.

You’ll have about 20 minutes here, and there’s typically an opportunity to swim outside the cave area. The key thing is how you plan for it:

• There are safety and weather considerations, and in rough conditions the Blue Cave part can be adjusted or skipped.
• The swim entry uses a ladder with narrow steps, so water shoes can make a big difference.

I like this stop because it’s sensory. Even if you’ve seen photos, being on the water in person changes the effect. Light hits differently when you’re close, and the rock forms make the water feel protected, almost quiet.

Bring a towel you don’t mind getting wet, and pack flip-flops or water shoes for the ladder situation. One review mentioned that jackets or help with wind can be appreciated, which is why you should still bring a warmer layer even if you’re going to swim.

Timing matters too. The info provided notes that the Blue Cave water after 6 pm is not the same as during daylight. So for the classic look, you’ll want a daytime departure rather than a late one.

Price and what you get for $39.91, plus the small extra you should expect

At $39.91 per person, this tour is priced like a value boat day, not a luxury private charter. For that money, you get:

• An English-speaking skipper or tour guide
• Insurance
• Fuel and water

What you should budget for:

• Our Lady of the Rocks entry is 3€, not included.
• Food and drinks are not included unless specified.

So the true cost depends on your personal habits. If you just drink water and snack lightly, you’re likely fine. But I’d still bring something simple if you get hungry, because you’re on the water and walking briefly, not sitting down for a meal.

Is it worth it? If you want a Bay of Kotor highlights sampler that mixes culture, history, and an actual swim, it’s a fair deal for a 3-hour loop. If you only care about one thing, like the Blue Cave, then you might compare other options. But the bundle here is strong, especially with the submarine tunnels and Mamula passing by, which you’d otherwise piece together separately.

Who should book this Kotor Bay speedboat loop, and who should skip it

This tour fits best if you like motion and short, well-spaced stops. It’s also great if you’re short on time in Kotor and want to cover a lot of bay area without a full day plan.

It may not fit as well if you have limited balance. Getting on and off the boat ladder takes coordination, and wind can make things feel more challenging. Some people will feel perfectly fine with that, others will want a slower option.

It also helps if you’re comfortable with the idea that swimming is conditional. The Blue Cave stop can be skipped when weather is poor. I like that the operator plans for safety rather than pushing it. Still, if swimming is your top goal, treat weather as part of the deal.

Families: children must be accompanied by an adult. For families, a short tour can be a plus, but keep in mind the boat ride is fast and windy.

Practical tips that make the day smoother

A few choices can make this tour feel easy instead of hectic:

• Arrive early and don’t rely on the fastest route to find the meeting stall. Give yourself cushion time.
• Pack a jacket or shawl. Even off-season, wind on the speedboat can get cold fast.
• Bring a sunglasses + sunscreen combo. You’ll get sun exposure while cruising.
• Wear comfortable shoes or sandals that handle wet deck conditions.
• If you plan to swim, bring a towel and consider water shoes for the ladder.
• For Our Lady of the Rocks, plan your clothing so you can put on at least a T-shirt before stepping into the church.
• If you care about connectivity, one rider noted wifi on the speedboat. Don’t assume it for every departure, but it’s a nice possibility.

Also, don’t overpack your expectations about commentary style. Some days may use recorded segments, and some captains provide more direct narration. Either way, you’ll get the big picture, and the scenery does most of the work.

Should you book this Kotor Bay boat tour?

Book it if you want a high-impact, short day: Kotor Bay views, Our Lady of the Rocks on its manmade islet, Cold War submarine tunnel context, Mamula’s WWII story from the water, and a Blue Cave swim chance. The price feels fair for what you see in 3 hours, and the small practical rules are easy to manage if you pack for them.

Skip it if you dislike fast boats, struggle with ladder entries, or you’re traveling at a time where rough sea conditions are common for your dates. In bad weather, the most exciting part, the Blue Cave swim, can be reduced or skipped. If that’s your must-have, you’ll sleep better if you can be flexible with timing.

If you can handle wind, short stops, and a quick swim window, this is a very efficient way to experience the Bay of Kotor beyond the main promenade.

FAQ

How long is the Kotor boat tour?

It runs about 3 hours, approximately.

What is included in the price?

The tour includes an English-speaking skipper or tour guide, insurance, fuel, and water.

Do I need to pay anything at Our Lady of the Rocks?

Yes. Entry/Admission to Our Lady of the Rocks is 3€ and is not included.

Is swimming in the Blue Cave guaranteed?

No. The Blue Cave visit may be skipped if weather or sea conditions are challenging, and that decision is made for safety.

What should I wear for the Our Lady of the Rocks church?

You must not enter the church in swimwear. You need at least a T-shirt on.

What is the group size limit?

The tour has a maximum capacity of 25 people.

Is there free cancellation?

Yes. You can cancel for a full refund up to 24 hours in advance of the experience start time.