Zakynthos Small Boat Tour to Keri Mizithres and Marathonisi

Zakynthos looks best from a small boat. This five-and-a-half-hour outing from Laganas takes you along the island’s southern coast toward Keri Caves, Mizithres, and Marathonisi, with time for swimming and possible turtle spotting. I like the intimate boat size, limited to 12 people, and the chance to reach coastal places that are hard to see from land. I also like that lunch and hotel pickup are part of the plan.

The main drawback is the loose timing. The boat portions are described in several ways, and one account found more time spent on transport and at the restaurant than expected. There are also no toilets on the boat or at Agios Sostis port, so you need to plan ahead.

Key points at a glance

• Small boat, maximum 12 people: This gives the outing a more personal feel than a large sightseeing vessel.
• Three southern Zakynthos sights: You pass Keri Caves, Mizithres, and Marathonisi, also called Turtle Island.
• Swimming and turtle spotting: The schedule includes swimming stops, though sightings and sea conditions cannot be guaranteed.
• Lunch included: The meal is served at a local restaurant, identified in the feedback as El Greco.
• Pickup from your accommodation: Exact pickup details arrive a few days before departure.
• Bring drinks and use the toilet first: Nothing is sold at the port, and there are no restroom facilities during the boat portion.

Why this small boat trip works

I like this tour because it focuses on the part of Zakynthos that is easiest to miss from a road. The southern coast is best appreciated from the water, where cliffs, sea caves, small coves, and pale rock formations come into view from a different angle.

A maximum of 12 people matters here. You are not simply one face in a crowd. You should have a better chance to hear the captain, move around the boat, and get a clear view when the group pauses for photographs or swimming.

The tour also combines several popular sights in one half-day outing. Keri Caves, Mizithres, and Marathonisi each offer something different. One is known for caves, one for dramatic rock scenery, and one for its connection with loggerhead turtles.

The published rating is strong, at 4.9 out of 5 from 86 ratings, with 99 percent of people recommending the trip. The most praised parts are the scenery, the friendly crew, the swimming stops, the food, and the feeling of seeing places you would not reach easily by road.

Still, this is not a tightly timed museum visit. Boat trips change with wind, waves, loading times, and sea conditions. If you need every minute to follow a fixed schedule, you may find the day less precise than expected.

Starting from Laganas and Agios Sostis

The tour begins around 10:00 a.m. Pickup is offered, but the exact collection point and time are sent by Cretan Holidays a few days before the trip. That arrangement is useful if you are staying in the Laganas area, though you should watch for the final message rather than assume a standard hotel pickup time.

The boat departs from Agios Sostis port. This is a small but important practical detail: there are no toilets at the port, and you cannot count on buying water, coffee, or snacks before boarding.

I would use the bathroom before leaving your accommodation and bring your own refreshments. Drinks are not included, and the lack of a shop at the port means you should not wait until arrival to buy them.

Transport is provided in an air-conditioned vehicle. That makes the ride to the port easier during a warm Zakynthos day, especially if you are staying away from Agios Sostis. The full outing is listed at approximately five hours and 30 minutes, but the exact balance between driving, waiting, time on the water, lunch, and swimming can vary.

Keri Caves from the water

Keri Caves are one of the main reasons to choose a boat trip in this part of Zakynthos. Rather than viewing the coast from a distant road, you approach the rock formations from sea level and pass along the cave entrances.

The tour description places the Keri Caves within a roughly three-hour boat cruise. That wording suggests the cruise is not just a quick photo stop. You should expect time spent moving along the coast, with the captain pointing out notable formations and stopping where conditions allow.

The caves are best treated as a scenic boat passage, not an underground walking visit. You will see the openings and rock walls from the boat, and the captain may bring you close enough to appreciate the color changes in the water and stone.

Several people particularly enjoyed the captain’s role in showing the coast. The captain operates the small boat and also provides information during the ride. That is useful to know because this is not a formal walking tour with a guide beside you at every stage.

The guide service is listed in English and French. If you need detailed commentary throughout the day, confirm how much spoken information will be provided on your specific departure. The captain is the central source of information once you are on the boat.

Mizithres and the southern coast

Mizithres is another highlight of the cruise, and it is often the point that gives this trip its strongest visual character. The area is known for striking pale rock formations rising from clear water, making it a natural place for photographs and a swim stop.

You may see the boat pause near attractive swimming areas, but the exact stop depends on sea conditions and the captain’s judgment. Swimming is a major part of the appeal, so bring a swimsuit, towel, and anything you need to feel comfortable in the sun.

The water can look inviting, but people prone to sea sickness should think carefully before booking. A small motorboat can feel every movement more sharply than a large vessel. If that applies to you, sit where the motion feels easiest, avoid boarding on an empty stomach, and bring any medication you normally use. Those are general precautions rather than special services provided by the operator.

Mizithres also shows why a small boat can be better than a large one. A compact vessel can offer a closer look at the coast and make it easier to stop for a swim. The tradeoff is less space, less shade, and a stronger feeling of movement when the sea is lively.

Marathonisi, the turtle island

The cruise also passes Marathonisi, a small island commonly known as Turtle Island. Its connection with loggerhead turtles gives this part of the trip a wildlife angle, and turtle spotting is one of the experiences people hope for.

You may see turtles, but no responsible boat trip can promise a sighting. Wildlife appears on its own timetable. The best approach is to enjoy Marathonisi for its coastline and turquoise water, with turtles as a welcome bonus rather than the whole reason for booking.

The description refers to Marathonisi during a roughly two-and-a-half-hour boat cruise. Taken with the Keri portion, this indicates that much of the outing is spent on the water, though the actual timing may be adjusted by conditions and the day’s operation.

A boat ride around Marathonisi can feel more peaceful than the faster coastal passages. You get open views of the island and the surrounding water, while the captain looks for suitable places to observe the coastline and marine life.

The tour is a good fit if you want to combine natural scenery with a chance to swim. It is less suitable if your main goal is a guaranteed close encounter with turtles or a long, formal stop on the island.

Swimming, lunch, and the pace of the day

The swimming stops are one of the clearest strengths of this excursion. You are not confined to the boat for the entire cruise. Instead, the outing gives you a chance to cool off in the sea and enjoy the places you have just seen from the water.

Lunch is included, which helps the $112.23 price make more sense. The restaurant associated with the outing is El Greco, described as a pleasant place with good food. A restaurant meal also gives the day a break from the sun and the movement of the boat.

Drinks are not included, so budget for those separately and bring water from the start. Since the port does not sell refreshments, this is not a minor detail. Pack what you need before pickup, especially if you prefer a particular drink or need extra water in warm weather.

The overall rhythm appears to be a mix of transport, boat time, swimming, and lunch. One account felt that transport and waiting took too much of the day, while others considered the outing well organized and worth the time. That difference is useful: your satisfaction may depend on how much you value a relaxed coastal day compared with a tightly packed sightseeing schedule.

What the guide and captain actually do

The tour includes an in-person guide in English and French, but the boat itself is operated by a captain who also gives information. In practice, the captain is central to the experience once you leave the port.

That setup can work well on a small boat. You get commentary from the person steering you along the coast, and the captain can respond to changing sea conditions. It also means the amount and style of explanation may feel more informal than a standard guided tour.

Do not expect a long lecture at every stop. The strongest part of the commentary is likely to be the practical information given as the boat approaches caves, rock formations, swimming areas, and Marathonisi.

The small group helps here. With only 12 people, you should be able to ask a question without shouting across a crowded deck. If you prefer a highly structured guide-led program, ask for clarification when you receive the pickup information.

Is $112.23 a fair price?

At $112.23 per person, this is not the cheapest way to see the southern coast. The value comes from the combination of transport, a small boat, a guide or captain, lunch, swimming opportunities, and several major sights in one outing.

A large boat may cost less, but it can offer a less personal ride. A private charter may give you more control, but it will usually cost more. This tour sits between those choices, giving you a limited group size without the price of a fully private day.

I think the price is fair if you want convenience. Pickup removes some transport planning, lunch is covered, and you do not need to arrange separate trips to Keri, Mizithres, and Marathonisi.

The value is weaker if you already have a car, prefer to spend a full day at one beach, or dislike boat travel. It is also less attractive if you expect five and a half hours of continuous cruising. The day includes more than time on the water.

Who should book this tour?

I would recommend it to couples, families, and small groups who want a simple way to see the southern coast. It suits you especially well if you enjoy swimming, photographs, coastal scenery, and a relaxed meal between boat stops.

It can also work for first-time visitors who do not want to organize port transfers or compare several separate boat trips. The itinerary covers enough ground to give you a useful taste of Zakynthos from the sea.

I would hesitate if you have serious sea sickness, need regular toilet access, or want a guaranteed turtle sighting. The lack of facilities at the port and on the boat is a real issue for some people, not a footnote.

The trip requires good weather. If poor conditions force cancellation, you can choose another date or receive a full refund. For any cancellation you make yourself, cancel at least 24 hours before the start time for a full refund. Changes or cancellations inside that window are not accepted.

FAQ

Where does the Zakynthos small boat tour start?

The boat departs from Agios Sostis port, with pickup offered from your accommodation area.

What time does the tour begin?

The listed start time is 10:00 a.m.

How long does the tour last?

The experience lasts approximately five hours and 30 minutes.

How many people can join the boat trip?

The maximum group size is 12 people.

Which places does the boat visit?

The cruise passes Keri Caves, Mizithres, and Marathonisi, also known as Turtle Island.

Is lunch included?

Yes, lunch is included in the tour.

Are drinks included?

No. Drinks are not included, and you should bring your own refreshments.

Are there toilets on the boat or at the port?

No. There are no restroom facilities on the boat or at Agios Sostis port.

Is the tour available in English?

Yes. The tour is offered in English, and the in-person guide service is listed in English and French.

Can I cancel for a refund?

Yes, you can receive a full refund if you cancel at least 24 hours before the experience begins. If poor weather causes the operator to cancel, you will be offered another date or a full refund.

Should you book it?

Book this tour if you want an easy, small-group introduction to Zakynthos from the water. The strongest reasons are the limited group size, the mix of Keri Caves, Mizithres, and Marathonisi, the swimming stops, and the included lunch.

Before booking, accept the practical limits: timing may feel flexible, drinks are your responsibility, and there is no toilet access during the port and boat portions. If those points suit you, this is a good-value half-day choice for seeing the island’s southern coast, with a reasonable chance of turtles and plenty of room for memorable sea views.