Medulin: Glass Boat Tour Experience to Kamenjak with Mermaid

Small boat, big family appeal. This three-hour glass-bottom cruise from Medulin visits Kamenjak, Golumber Cave, and the Medulin archipelago, with swimming, fish feeding, drinks, music, and a Mermaid who entertains children in the water. I especially like the short length and the chance to see the seabed without committing to a full-day trip.

I also like the protected swimming stop at Kamenjak and the easy price of about $34 per person. The main drawback is that the route can change with conditions, and the lighthouse may not be included every day, so you should book this for a pleasant family boat outing rather than a guaranteed checklist of every sight.

Key points to know before boarding

• A three-hour route from Medulin: This is the shortest boat excursion in the company’s range, making it useful for families and anyone who dislikes long days at sea.
• Glass-bottom viewing for children: You can watch local Adriatic fish beneath the boat, then take part in a fish-feeding activity.
• Kamenjak swimming stop: The boat pauses in the protected waters of Nature Park Kamenjak for swimming and snorkeling.
• Golumber Cave access: You can enter the cave on your own during the stop, provided sea conditions and the captain’s route allow it.
• Porer Lighthouse is not guaranteed: The famous 1846 lighthouse is part of the sightseeing plan, but the route may vary.
• Family-friendly extras: Drinks, music, a toilet, crew assistance, and the Mermaid character are included.

What this Medulin boat tour is really like

The trip leaves from Medulin Harbour and returns to the same place. You check in 30 minutes before departure at the advertising desk shaped like a small boat, beneath a large dark blue parasol. A team member is usually there to help you find the right place.

From the harbour, the boat heads toward the Medulin archipelago. The early part of the ride is about getting out onto open water and watching the seabed through the boat’s glass panels. This is not a submarine-style viewing trip, so the sights below depend on water clarity, light, and the boat’s exact position. Still, it gives children something to watch while the boat is moving.

I like this setup because it avoids the usual problem of a short sightseeing cruise: children getting bored before the first stop. Looking down through the glass, spotting fish, and listening to the crew give the ride a simple purpose. You are not expected to sit still and admire the horizon for three hours.

The tour is hosted in English. The crew, captain, and Mermaid are included, and drinks are served during the outing. Food is not included, so eat before you go or bring a suitable plan for the time around the cruise.

Seeing the Medulin archipelago from the water

The Medulin archipelago is best appreciated from the boat because the route gives you changing views of the islands and rocky coast. The trip is described as a panoramic ride, but the exact order of stops is not fixed. The captain may adjust the route for sea conditions or other practical reasons.

That flexibility matters in this part of Istria. The sea can look calm from shore and still make a route uncomfortable for a smaller boat. The captain has the final say and may change or cancel the trip when weather or sea conditions are poor. If the excursion is canceled for that reason, you receive a refund or an alternative date.

You should also keep your expectations in check. This is a short local cruise, not a full coastal survey. You will see the Medulin archipelago and may pass notable points, but the focus is on a few simple activities rather than a long list of sights.

The boat includes music, a toilet, drinks, and a crew that helps with the stops. Those details are easy to overlook when booking, but they make a difference on a three-hour outing, especially with young children.

Glass-bottom viewing and feeding Adriatic fish

The glass-bottom section is the tour’s most practical family feature. You can look down while the boat is underway or stopped and watch local Adriatic fish below. The view will not be the same on every departure, since water clarity and sunlight affect what you see.

The fish-feeding activity gives the children a more active role. Instead of only pointing at the water, they can watch fish gather near the boat. Bring a camera, but protect it from splashes and keep your phone secure when you move around the deck.

One family-focused detail is the Mermaid. During the swimming stop, she enters the water and swims beneath or around the boat, making the pause more engaging for children. She also helps create photo opportunities and encourages younger passengers to take part.

This part is best understood as light entertainment, not a staged theatrical show. If you are expecting a long professional performance, you may find it modest. If your aim is to give children a memorable boat ride with a playful character, it can work very well.

The Mermaid was especially well received by families with children, and the crew was described as kind and helpful. That fits the tour’s character: simple, cheerful, and aimed at keeping a family group comfortable.

Swimming in Nature Park Kamenjak

The main stop is in the protected waters of Nature Park Kamenjak. Here, you get time to swim and snorkel from the boat. Pack swimwear, a towel, sunscreen, and water, even though drinks are included.

This is not a beach excursion with a long walk ashore. The attraction is the chance to get into the sea directly from the boat and enjoy a short pause in the Kamenjak area. Bring footwear and belongings you can manage safely around a boat, but use only what you need.

The swimming stop also gives you the best chance to take photos of the Mermaid in the water. Children can watch the fish through the glass bottom, feed them, swim, and look toward the nearby cliffs. That change of activity helps the three hours pass quickly.

If you do not like swimming from boats, this stop may feel less rewarding. The tour includes swimming and snorkeling as central activities, so you should not book it expecting a sightseeing-only cruise.

People prone to seasickness should think carefully before booking. The tour operator also says it is not suitable for people with heart problems. Wheelchair users cannot take part, so check these restrictions before paying.

Entering Golumber Cave at Kamenjak

Golumber Cave is cut into the cliffs of Kamenjak and provides the trip’s most distinctive stop. Depending on the route and conditions, you can enter the cave on your own during the pause. The cave is not simply something you view from a distance, which gives this short cruise a more hands-on feel.

The cave visit is also one reason to pack a camera, though you should be cautious with phones and loose items near the water. The provided information does not promise a guided cave tour, so think of it as a brief personal exploration rather than a formal underground visit.

The captain may alter the route if the sea is rough. That means Golumber Cave is a planned highlight, but not an absolute guarantee in every condition. Safety takes priority over completing every stop.

I like the cave because it breaks up the standard swim-and-return pattern. You get a natural feature to explore, then return to the boat for the next part of the ride. For children, entering a cave can be more memorable than another pass by a distant shoreline.

Porer Lighthouse and the route that may change

Porer Lighthouse is one of the tour’s most attractive photo stops. Built in 1846 during the Austro-Hungarian Monarchy, it sits offshore and is described as one of Croatia’s biggest lighthouses.

The lighthouse is included in the advertised sightseeing highlights, but it may not appear on every departure. The route can vary by day, and the captain may choose a different course. One family found that the lighthouse was not included and spent more time circling an island before returning to Medulin.

That is the clearest reason to keep your expectations flexible. If Porer is your main reason for booking, ask at check-in if that day’s route is expected to include it. Even then, weather and sea conditions can change the plan.

I would not book this as a dedicated Porer Lighthouse tour. I would book it as a short Kamenjak cruise that may also provide a lighthouse view. That distinction will help you judge the price fairly and avoid disappointment.

Is $34 good value for three hours?

At about $34 per person, the tour offers a reasonable package for a short family outing. You receive three hours on the water, a captain and crew, drinks, music, toilet access, glass-bottom viewing, fish feeding, swimming, and the Kamenjak and Golumber Cave route.

The price makes the most sense when you use several parts of the outing. A family with children can get value from the boat ride, fish viewing, Mermaid, swimming, and cave stop. If you mainly want a long sightseeing cruise or guaranteed access to every advertised point, the value is less certain.

A private boat would give you more control, but it would also be a different product and may cost more. This shared excursion is easier for people who want a scheduled activity without arranging a boat themselves. The trade-off is that you follow the captain’s route and the group’s timetable.

The trip’s short length is a major part of its value. A six-hour cruise can be tiring for small children, people with limited time, or anyone unsure about spending a full day at sea. Three hours gives you a taste of the coast without using an entire morning or afternoon.

Who will enjoy it most

I would choose this tour for families with children who want several small activities in one outing. The glass bottom, fish feeding, Mermaid, swim stop, cave, and music keep the pace varied.

It also suits you if you prefer a short boat ride. The tour is specifically the shortest excursion offered by Tajana & Zlatni Rat Excursions, and three hours is enough to see the Kamenjak area without making the sea the whole day’s plan.

It is less suitable if you need guaranteed sightseeing stops. Porer Lighthouse may be left out, and the route can change. You should also avoid it if you are prone to seasickness, have heart problems, or use a wheelchair.

Couples and adult groups can still enjoy the coastal views and swimming, but the Mermaid and fish activities give the outing a clear family focus. Adults looking for quiet, serious nature viewing may find the music and children’s entertainment less appealing.

What to bring and how to prepare

Arrive at Medulin Harbour 30 minutes before departure. Look for the boat-shaped advertising desk and large dark blue parasol, then ask a staff member if you need help.

Bring:

• Swimwear and a towel
• Sunscreen
• A camera or protected phone
• Drinking water
• Any personal items you need for a few hours on the sea

Food is not included, while drinks are included. The tour ends back at the harbour, so you do not need to arrange a separate return transfer. Transportation to the boat is not included, so make your own way to Medulin Harbour.

Book with a flexible attitude. Bad weather or rough seas can lead to a changed route or cancellation by the captain. You can cancel up to 24 hours before departure for a full refund, and the reserve-now, pay-later option can help if your Istria plans are still moving around.

Should you book the Mermaid cruise?

Book it if you want a short, family-friendly sea outing with swimming, fish viewing, and a playful Mermaid rather than a major sightseeing voyage. The three-hour length, included drinks, toilet, crew support, and several activities make it a practical choice for families.

Skip it if Porer Lighthouse is your chief goal, if you want a private boat, or if you dislike shared activities and flexible routes. The best way to judge this trip is to see the lighthouse as a bonus, not a promise.

For most families staying in Medulin, I think the tour offers fair value at $34 per person. Just arrive ready for a pleasant coastal ride, not a perfectly fixed itinerary. That small adjustment in expectations is the key to enjoying it.

FAQ

Where does the boat tour start and end?

The tour starts at Medulin Harbour and returns to the same meeting point at the end.

How early should I arrive?

You should check in 30 minutes before the tour starts. Look for the boat-shaped advertising desk beneath the large dark blue parasol.

How long does the excursion last?

The boat trip 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?

You can explore Golumber Cave on your own during the stop, depending on the route and sea conditions.

Is Porer Lighthouse guaranteed to be part of the route?

No. Porer Lighthouse is a sightseeing highlight, but the route can vary, and the lighthouse may not be included on every departure.

What is included in the price?

The price includes the three-hour boat ride, swimming and snorkeling, Golumber Cave exploration, fish feeding, sightseeing, the captain and crew, the Mermaid, drinks, music, and toilet access. Food, transportation to the boat, and wheelchair access are not included.