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Explore Zakynthos's marine beauty on a 2.5-hour speedboat tour, spotting turtles, swimming in caves, and visiting iconic islands like Marathonisi and Cameo.
The Zakynthos: Turtles, Marathonisi & Keri Caves Speedboat Tour offers an engaging journey through some of the most scenic spots in western Greece. Priced for a 3-hour eco-friendly turtle spotting cruise, this tour departs from Agios Sostis Harbor with hotel pickup included. The vessel is a semi yacht speedboat, providing a comfortable yet thrilling way to experience Zakynthos’s marine landscapes. With over 200 reviews and a 4.5-star rating, this experience is well-regarded for its combination of wildlife encounters, stunning caves, and beautiful islands.
While the turtle sightings are guaranteed, it’s worth noting that, depending on the season, spotting turtles can vary. The tour is ideal for those seeking a quick, active way to explore Zakynthos’s southwestern coast, especially for visitors interested in marine nature, caves, and small island visits. The timing and group size tend to work well for lively, small-group adventures, though some reviews mention transportation hiccups, so plan accordingly.


This tour starts with a pickup in Zakynthos and heads directly to Agios Sostis Harbor, where the speedboat departs. The National Marine Park of Zakynthos is the main focus, established to protect species like loggerhead sea turtles and Mediterranean monk seals. The guaranteed turtle sightings happen as the boat approaches these creatures in their natural environment, offering unforgettable photo opportunities from close range.
The park’s protected status helps ensure visitors see these majestic turtles swimming freely, with the tour designed to keep a safe and respectful distance. This focus on ecological awareness is reinforced by the eco-friendly nature of the cruise, which emphasizes respectful wildlife viewing.
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The tour includes a pass-by of the famous Cameo Islet, created by the 1633 earthquake. Its distinctive shape makes it a popular photo stop, offering a chance to admire its unique formation. Next, the Keri Caves are central to the adventure, with the boat navigating through a series of caves on the coast, many accessed via high-speed passages that add an adrenaline rush.
Inside the caves, the guides maneuver the boat close enough for visitors to take spectacular photos and experience the glowing, fluorescent colors underwater. For many, these caves are a highlight, providing a sense of wonder with their natural arches and shimmering waters.

This tour features two swim stops, both on private beaches and near caves. The first occurs at a beach called Oasis, a quiet, less crowded spot ideal for relaxing or quick dips in the warm Ionian Sea waters. The second stop takes place at Marathonisi, also known as the turtle-shaped island, which is a well-known breeding ground for loggerhead turtles.
At Marathonisi, visitors get the chance to soak up the sun, swim in the clear waters, or explore the island’s shoreline. The relatively long 50-minute swim stop provides ample time to enjoy the tranquil environment and capture photographs of the island’s distinctive shape and surrounding nature.

The Keri Caves are a major draw of this trip, with the speedboat navigating through series of caves and arches along the southwestern coast. The high-speed passages through these caves give an exhilarating feel, and the guides make sure everyone gets good photo opportunities inside the caves, capturing the shimmering waters and natural rock formations.
The inside visits offer a rare chance to see the caves from a close vantage point, something not possible from land. Many reviews praise the boat handling and the expertise of the guides when approaching these natural formations.
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Marathonisi, the turtle-shaped island, is a highlight for its beautiful beaches and significance as a breeding ground for loggerhead turtles. The last swim stop of the day here allows passengers to enjoy the crystal-clear waters and sunbathe on the sandy shores.
This island offers a peaceful environment, perfect for relaxation or snorkeling. Its shape makes it a favorite for photographers aiming to capture the iconic turtle silhouette against the blue sea.

The meeting point is marked by flags with ZANTE MARE, making it straightforward to locate at Agios Sostis Harbor. The tour includes hotel pickup and drop-off, which simplifies logistics for visitors, though some reviews suggest that transport arrangements can sometimes be inconsistent, so arriving early or organizing own transportation might improve the experience.
The group size is kept small, enhancing the personalized feel of the trip. The crew and captain are experienced, with guides speaking English and Greek, and safety is a priority throughout the high-speed passages and cave navigations.

The 2.5-hour experience includes multiple stops, such as swimming at private beaches, exploring caves, and photo sessions at scenic spots like Cameo Islet. The timing allows for a relaxed pace, with enough time for snorkeling, capturing photos, and enjoying the scenery.
Swim gear is recommended, and travelers should bring sunscreen, hats, towels, and cameras. The tour is not suitable for pregnant women, people with back problems, wheelchair users, or those prone to seasickness, so preparation is important for a smooth outing.

Many reviews sing praises for the guides and captains, with Christos and George mentioned as skilled, friendly, and knowledgeable. They are praised for their ability to navigate caves with precision and share insights about the area’s geography and wildlife.
Guests especially appreciate guides who engage with the group, give flexibility in stops, and allow passengers to drive the boat—a unique feature that adds an interactive element to the trip.

With a 4.5-star rating based on over 200 reviews, this tour is considered excellent value for the experience it offers. The guaranteed turtle sightings, combined with fantastic cave explorations and relaxing swim stops, make it worthwhile for adventure seekers and nature lovers.
While some guests mention transportation issues and timing delays, the overall experience consistently receives high marks. The small-group size and personalized guide interactions contribute to a more intimate and enjoyable experience.
This speedboat tour in Zakynthos delivers a mix of wildlife watching, scenic caves, and island discovery in a compact timeframe. It is especially suitable for those eager to see turtles in their natural home, explore spectacular caves, and enjoy swimming in warm waters.
The experienced guides and captains make a noticeable difference, ensuring safety and fun throughout the adventure. While logistics may occasionally pose minor challenges, the overall value and memorable sights make this tour a top choice for visitors with limited time or those wanting an active, marine-focused outing.
Anyone who appreciates adorable islands, natural caves, and marine wildlife will find this trip engaging and satisfying. Just remember to bring essentials like sunscreen and water, and prepare for a lively, scenic ride that keeps the views and wildlife front and center.
“We had an incredible time on our speedboat tour, and our guide David was the highlight of the whole experience! From the moment we boarded, he was …”
Is the turtle spotting guaranteed on this tour?
Yes, the tour guarantees turtle sightings, with many photo opportunities of loggerhead turtles swimming in their natural habitat.
What stops are included in the 2.5-hour cruise?
The main stops are Cameo Islet for photos, Keri Caves for cave exploration, Oasis beach for swimming, and Marathonisi for relaxing and more swimming.
Is this tour suitable for small children or those with mobility issues?
The tour is not suitable for wheelchair users or people with back problems. Children are welcome but should be able to enjoy boat rides and swimming.
What should I bring for the trip?
Bring a hat, swimwear, towel, sunscreen, a camera, and water. Use biodegradable sunscreen to protect marine life.
Are hotel pickup and drop-off included?
Yes, both pickup and drop-off are included and conveniently arranged at your accommodation or designated meeting point.
Can I drive the boat during the tour?
Yes, some guides offer the chance to drive the speedboat, which adds an exciting, interactive element to the experience.
How long do the swimming stops last?
The stops at Oasis and Marathonisi are 30 and 50 minutes, respectively, giving plenty of time to swim, sunbathe, or take photos.
What is the best time of day to take this tour?
While specific start times vary, many guests recommend early morning trips for cooler weather and calmer seas, though later times also provide beautiful golden hour light.
This detailed review captures the essence of the Zakynthos: Turtles, Marathonisi & Keri Caves Speedboat Tour—combining natural beauty, wildlife, and adventure in a way that appeals to travelers seeking a lively and scenic day on the water.
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