Medulin: Glass Boat Tour Experience to Kamenjak with Mermaid

The most memorable part of this short cruise is likely to be Golumber Cave, a sea cave tucked into the cliffs of Kamenjak. You reach it by boat from Medulin, then have time to swim and enter the cave on your own. Children also get a close look at Adriatic fish through the glass bottom, with the Mermaid swimming near the boat during the stop.

I like the three-hour length, which keeps this outing manageable for families and anyone who does not want a full-day boat trip. I also like the simple extras: drinks, music, a toilet, and a fish-feeding activity are included. The main caution is that the route can change with sea conditions, and the lighthouse is not guaranteed on every departure.

Key points to know before booking

• Golumber Cave is the main natural attraction: You can swim toward the cave and enter it on your own when conditions allow.
• The Mermaid is part of the family entertainment: She swims near the boat and helps keep children interested during the swimming stop.
• The glass bottom works best for children: It offers a quick look at fish and the seabed while the boat is moving or anchored.
• Porer lighthouse is a photo stop, not a guaranteed sight: The advertised route includes it, but the actual course may vary.
• The tour lasts three hours: That makes it a useful half-day choice, but not a substitute for a longer coastal excursion.
• Bring swimwear, a towel, sunscreen, water, and a camera: Food is not included, though drinks are provided.

A short boat ride from Medulin to Kamenjak

This outing leaves from Medulin Harbour and heads toward the Medulin archipelago. The boat has a glass section below, so you can watch the seabed and local fish without getting into the water.

That feature matters most if you are traveling with young children. A three-hour trip can feel long to a child if it is only open water and coastline. Looking through the glass, listening to music, spotting fish, and waiting for the Mermaid to appear give the ride several small points of interest.

You should arrive 30 minutes before departure. At the harbour, look for the advertising desk shaped like a boat and the large dark blue parasol. A team member is usually there to help you find the correct meeting point.

The boat returns to the same harbour at the end. You arrange your own transport to Medulin Harbour, so allow extra time if you are coming from another part of Istria.

What the glass-bottom boat adds

A glass-bottom boat does not turn the trip into a full underwater tour. The view depends on the water, the boat’s movement, and where you are seated. Still, it gives you another way to watch the sea between stops.

The most useful part is the easy access. You do not need snorkeling gear to see something below the surface, and children can look down while staying dry. The crew also offers a fish-feeding activity, which gives you a better chance of seeing local Adriatic fish around the boat.

I would treat the glass bottom as a pleasant extra rather than the main reason to book. The strongest parts of the trip are the swim and the cave. If you want long periods of clear underwater viewing, a dedicated snorkeling trip may suit you better.

The boat ride itself is described as panoramic. You will see the Medulin archipelago from the water, with the scenery changing as you move toward Kamenjak. The short route means less time on the boat than on many larger coastal excursions, which is helpful for families and for anyone prone to seasickness. At the same time, people who dislike boat motion should know that the activity is not recommended for those who are prone to seasickness.

Kamenjak’s protected water and swimming stop

The tour includes swimming in the protected waters of Nature Park Kamenjak. This is the point where you should expect the experience to become more active. Bring swimwear and a towel, and use sunscreen before boarding rather than waiting until the boat is moving.

The stop is also where the Mermaid becomes part of the show. She swims in the water near the boat and, according to the supplied details, may swim there and back beneath or around the boat toward the swimming area. For children, this creates a clear focus during what could otherwise be a routine swimming break.

The Mermaid is not a separate long performance. Think of her as a friendly character in the water who helps children stay engaged. One child-focused account described her as especially kind and helpful, and that matches the role presented in the tour details.

You will have time to swim and watch fish, but the exact amount of time at each stop is not stated. The captain controls the route and may change it if the weather or sea conditions are poor. That is sensible on an Adriatic boat trip, but it means you should not plan around a precise sequence of stops.

Entering Golumber Cave near the Kamenjak cliffs

Golumber Cave is the most distinctive stop. It sits within the cliffs of Kamenjak, and the boat takes you close enough for you to explore the cave on your own by entering from the water.

This is not a guided cave walk with paved paths or lighting. You should expect a natural sea cave, a swim, and a short personal exploration. That makes the stop appealing, but it also means you need to be comfortable in the water and follow the captain’s instructions.

The cave is especially valuable because it gives the trip a clear sense of place. You are not simply cruising near the coast and turning around. You are using the boat to reach a feature that is difficult to visit from the harbour in a short time.

If you are bringing a camera, protect it carefully around the water. The tour information recommends a camera, but it does not state that waterproof equipment is supplied. A towel, sunscreen, and water are also essential items for the stop.

People with heart problems should not take this activity, and it is not suitable for wheelchair users. The swimming and cave portion require a level of mobility that the boat cannot provide for every passenger.

Porer lighthouse and the changing route

Porer lighthouse is one of the advertised sights. It was built in 1846 during the Austro-Hungarian Monarchy and is described as one of Croatia’s biggest lighthouses. From the boat, the main appeal is the chance to photograph it from the sea.

Keep your expectations realistic. The route is not fixed in every detail, and the lighthouse may not appear on your departure. One account specifically noted that the group did not see Porer and instead cruised around an island before returning to Medulin.

That does not automatically make the trip poor value. Sea conditions and the captain’s safety decision can affect the route. Still, if Porer is the single sight you most want to see, you should ask about that day’s route before boarding or choose a longer excursion that confirms the lighthouse as a central stop.

The lighthouse works best as an added photo opportunity, not as the core promise of the outing. Golumber Cave, the Kamenjak swim, and the family-friendly boat activities are more dependable reasons to book.

How the three hours are likely to feel

The trip begins with boarding at Medulin Harbour, followed by the ride through the archipelago toward Kamenjak. During the cruise, you can watch the seabed through the glass bottom and take in the coastal views.

The central stop combines swimming, fish watching, feeding local fish, and the Mermaid’s appearance. You then have the opportunity to enter Golumber Cave on your own. The lighthouse and other sightseeing points depend on the route chosen by the captain.

Finally, the boat returns to Medulin Harbour. The supplied itinerary does not give a minute-by-minute schedule, so you should think of this as a flexible three-hour outing rather than a tightly timed series of attractions.

For a family, that flexible rhythm can work well. There is enough variety to keep the trip moving, but not so much time aboard that younger children are likely to lose patience. For adults expecting a major coastal tour, the short duration may feel limited.

Music and included drinks add comfort without changing the basic nature of the excursion. Food is not included, so eat before departure or plan a meal after returning to Medulin.

Is $34 a fair price?

At $34 per person, the value depends on what you want from a boat trip. The price includes the three-hour ride, the captain and crew, drinks, music, toilet access, the glass-bottom viewing, the Kamenjak swimming stop, fish feeding, and the chance to explore Golumber Cave.

For a family seeking a simple half-day outing, that is a reasonable bundle. You do not need to arrange a separate boat, find your own route to Kamenjak, or organize the cave stop. The Mermaid also adds a family-focused touch that a standard sightseeing cruise may not provide.

The value is weaker if you are booking mainly for Porer lighthouse or expecting a full coastal tour. The route may change, the lighthouse is not guaranteed, and one adult group found the sightseeing portion too limited for the total cost of their party.

I would compare this tour with the price of renting a private boat only if you are traveling in a larger group and want control over the route. For a small family or couple, the convenience of a crewed boat and included activities may outweigh the shorter itinerary. For several adults, expectations about the route matter more.

Free cancellation is available up to 24 hours before the tour for a full refund. You can also reserve now and pay later, which helps if your Istrian schedule is still changing.

Who will enjoy this Medulin boat tour most?

I would recommend it first to families with children. The glass bottom, Mermaid, fish feeding, swimming, music, and short duration give children several things to anticipate. The crew is presented as friendly and helpful, and the Mermaid is clearly intended to make the water stop more fun for younger passengers.

It also suits you if you want a brief sea outing rather than a full-day cruise. Three hours leave room for another activity in Medulin or elsewhere in Istria. The tour is also a sensible choice for people who prefer a shorter boat ride, provided they are comfortable with normal sea movement.

Couples can enjoy it if they like simple coastal sightseeing and want to swim near Kamenjak. The cave gives the trip a little more character than a ride that only circles the archipelago.

I would be cautious about booking if you are an adult group looking for extensive sightseeing, a guaranteed Porer lighthouse visit, or a long snorkeling session. The tour has a clear family focus, and the route may include more open cruising than you expect.

Practical tips for a smoother outing

Arrive at least 30 minutes early. Medulin Harbour can be busy, and finding the boat-shaped desk and dark blue parasol is easier before the group gathers.

Wear swimwear under your clothes if possible. You will be ready for the swimming stop without needing to change on a moving boat. Pack a towel, sunscreen, water, and a camera, as these are specifically recommended.

Food is not included, so plan around that. Drinks are included, but the available selection is not specified. If you need a particular snack or drink, do not assume it will be supplied.

Bring a secure camera or phone case for the cave and swimming stop. The tour invites you to take photos, especially around Porer lighthouse, but water is part of the activity.

If the sea is rough or the weather turns bad, the captain can change the route or cancel the outing. A cancellation caused by those conditions results in a refund or an alternate date. This is a safety decision, not a flaw in the tour, but you should keep some flexibility in your plans.

Should you book the Mermaid glass-bottom boat?

Book this tour if you want a short, family-friendly trip from Medulin with a swim, a natural cave, fish feeding, and a bit of character from the Mermaid. Its strongest qualities are the manageable three-hour length and the range of small activities packed into that time.

Book with more caution if Porer lighthouse is essential or if you expect a full sightseeing cruise. The lighthouse may be skipped, and the route can vary. For the best value, think of this as a compact Kamenjak outing built around swimming and Golumber Cave, with the glass bottom, fish, Mermaid, and lighthouse as added features.

FAQ

Where does the tour start?

The tour starts at Medulin Harbour. Look for the advertising desk shaped like a boat and the large dark blue parasol, where a team member can help you.

How early should I arrive?

You should check in 30 minutes before the tour starts.

How long does the boat tour last?

The experience lasts three hours. Starting times depend on availability.

Is swimming included?

Yes. The tour includes swimming and snorkeling in the protected waters of Nature Park Kamenjak.

Can I enter Golumber Cave?

Yes. The tour includes exploration of Golumber Cave, and you can enter it on your own from the water.

Will the boat visit Porer lighthouse?

Porer lighthouse is included as a sightseeing point, but the route may vary. The lighthouse is not guaranteed on every departure.

Are drinks and food included?

Drinks are included. Food is not included.

Is the tour suitable for wheelchair users or people prone to seasickness?

No. The activity is not suitable for wheelchair users, people with heart problems, or people prone to seasickness.