The 6 Best Tours in Agios Sostis
Agios Sostis is a prime spot on Zakynthos for exploring by boat and discovering the island’s most stunning sights—without the crowds. Its proximity to the National Marine Park of Zakynthos means you’re within reach of incredible sea caves, turtle habitats, and scenic rock formations. We love the speedboat tours, especially the chance to spot loggerhead sea turtles and visit Myzithres Beach with its dramatic rock formations. The variety of options—from private trips to group adventures—means there’s something for every traveler, whether you want a quick thrill or a more personalized experience.
One tour we particularly recommend is the Zakynthos: Laganas Bay, Myzithres & Turtles Speedboat Tour for its lively atmosphere, knowledgeable guides, and multiple swimming stops. For those seeking privacy and tailored time with a captain, the Zakynthos: Private Boat Tour with Captain offers a flexible, exclusive experience. If you’re on a budget but still want a taste of the sea, the Agios Sostis: Marathonissi, Keri Caves, and Turtle Spotting tour delivers a good mix of scenery and wildlife at a lower price point. The list below covers these options and more, helping you choose the right trip for your interests and style.
In this guide, you’ll find:
- Action-packed speedboat rides exploring caves and marine life
- Private boat outings tailored to your schedule and needs
- Budget-friendly glass-bottom boat trips for turtle spotting
- Guided tours focusing on specific sights like Marathonissi Island and Keri Caves
- Tips on what makes each trip unique and who will enjoy them most
1. Zakynthos: Laganas Bay, Myzithres & Turtles Speedboat Tour
At number 1, the Zakynthos: Laganas Bay, Myzithres & Turtles Speedboat Tour is a top pick for its lively pace and varied stops. This 3.5-hour trip offers a speedboat adventure around Zakynthos Marine Park, where you’ll see loggerhead sea turtles in their natural habitat — a truly memorable sight. The tour hits three swimming spots, including the iconic Myzithres Beach with its striking rock formations, and the Keri Caves, known for their impressive arches and tunnels.
Guests consistently praise the knowledgeable guides, like Jimmy, who share fascinating facts about the marine environment and ensure everyone gets ample time to swim and relax. The trip’s small group format makes it more intimate, allowing for personalized attention. Reviewers note the value for money and the breathtaking views, although some mention the pick-up and drop-off logistics could be smoother. This tour suits travelers looking for an active, fun-filled experience with plenty of chances to snorkel and photograph.
Bottom Line: Perfect for those who want a mix of wildlife, caves, and swimming in a lively setting, with the bonus of potentially seeing turtles early or late in the season.
2. Zakynthos: Turtle Island and Caves Private Boat Trip
Number 2 on our list is the Zakynthos: Turtle Island and Caves Private Boat Trip, which offers a highly personalized cruise. For around $333 per group, up to two people, you get a 3-hour private adventure starting from Agios Sostis Harbor. This trip is ideal if you want to avoid crowds and tailor your itinerary.
The private boat takes you to Marathonisi Island, shaped like a turtle—perfect for photos—and the Mizithres rocks, famous for their stunning turquoise waters. The guide is out on the water guiding you through sea caves, snorkel spots, and turtle habitats, with plenty of time to swim and explore at your own pace. Many reviews highlight the captain’s friendliness and the chance to see Caretta Caretta turtles up close, even if it’s not peak season.
What sets this tour apart is its intimacy and flexibility. It’s suited for couples or small groups seeking a relaxed, exclusive experience. The only downside might be the price, but for a personalized trip with plenty of time to explore, many find it well worth it.
Bottom Line: A fantastic choice for travelers who want privacy, flexibility, and a chance to experience Zakynthos’ beauty without sharing the boat with strangers.
3. Agios Sostis: Marathonissi, Keri Caves, and Turtle Spotting
At number 3, the Agios Sostis: Marathonissi, Keri Caves, and Turtle Spotting is a budget-friendly, 3-hour trip costing just over $28 per person. This tour uses a glass-bottom boat to explore the Keri Caves, where you’ll have chances to swim and snorkel, and to spot sea turtles in their natural environment.
What makes this trip stand out is the emphasis on wildlife observation and scenic caves. Passengers report seeing turtles and enjoying the dramatic scenery of the National Marine Park. The boat stops at Oasi Bay and Keri Cave’s area, with time to take photos and relax on the boat or nearby beaches. Reviewers note the short duration is perfect for a quick taste of Zakynthos’ marine landscape, especially for families or budget travelers.
While it doesn’t include the extensive stops or luxury of larger tours, this trip provides a straightforward, fun introduction to the area’s natural wonders. It’s best for those who want a quick, affordable experience with good chances of turtle sightings.
Bottom Line: Ideal for budget-conscious travelers or those with limited time seeking a family-friendly, scenic boat trip.
4. Zakynthos: Guided Boat Tour to Turtle Island with Swimming
Number 4, the Zakynthos: Guided Boat Tour to Turtle Island with Swimming offers a semi-private experience with a 3-hour itinerary that combines marine life viewing, swimming, and caves exploration. It has a high rating of 4.9/5 based on 26 reviews, reflecting its quality and personalized touch.
This tour departs from Agios Sostis Harbor and includes stops at Turtle Island for turtle spotting, Keri Caves, and the Mizithres Rocks. Guest reviews mention the knowledgeable local guide, Angelo, who shares detailed insights and ensures ample time for swimming and photography. The tour’s small group size means more personal attention and flexibility to adapt the route based on weather or wildlife activity.
It’s best suited for travelers who want a more intimate experience with less crowded conditions but still enjoy a comprehensive itinerary. The highlight for many is the chance to see turtles in their natural habitat and explore stunning sea caves.
Bottom Line: A high-quality, personalized tour that combines wildlife, caves, and scenic swimming stops—great for couples or small groups wanting a tailored experience.
5. Turtle Cruise from 9 am or 12 noon or 3 pm for 3 hours
The Turtle Cruise offers a straightforward, flexible 3-hour trip with departures throughout the day. Priced at $46 per person, it’s a more accessible option for travelers on a budget.
This cruise departs from Zakynthos town, with pickup options at prominent locations like McDonald’s in Laganas. It guarantees turtle sightings (season permitting), and includes stops at Keri Caves, Marathonissi (Turtle Island), and White Beach. The itinerary emphasizes snorkeling, swimming, and photo opportunities of caves, cliffs, and sea arches.
Many reviews mention the friendly crew and the chance to see Caretta Caretta turtles, especially in summer. The tour’s simplicity and focus on wildlife make it attractive for families or travelers with tight schedules who want a quick, reliable experience.
Bottom Line: A good, no-frills option that emphasizes turtle sightings and scenic stops at a fair price.
6. Zakynthos: Private Boat Tour with Captain
Last but not least, the Zakynthos: Private Boat Tour with Captain combines flexibility with luxury. Ranging from 3 to 5 hours, this tour is perfect for those who want to customize their itinerary and explore Zakynthos’ most iconic sights at their own pace.
Your captain takes you to Marathonisi Island, Keri Caves, Mizithres, and Agalas Caves, with plenty of opportunities for swimming, snorkeling, and wildlife watching, including Caretta caretta turtles. The reviews show it’s highly rated at 4.9/5, with travelers loving the knowledgeable skipper and the ability to go beyond the usual tourist spots.
This tour is ideal for couples, small groups, or travelers who value privacy and personalized service. The main downside is the price, but the flexibility and exclusive access often justify it.
Bottom Line: Best for travelers seeking a private, flexible, and comprehensive boat experience with a personal guide.
How to Choose the Right Tour for You
When selecting a tour in Agios Sostis, consider your budget, time constraints, and interest in wildlife or caves. If you want a lively, group adventure packed with swimming and cave exploration, the speedboat tours like the first option are excellent. For more privacy and flexibility, the private boat trip is unmatched. Budget travelers or those short on time might prefer the shorter, straightforward turtle cruise.
Think about your fitness level and comfort with water—most tours involve swimming or snorkeling, so bring suitable gear. Booking early, especially in high season, ensures you get your preferred time and tour type.
Final Thoughts
Agios Sostis offers a rich selection of boat tours that showcase Zakynthos’ natural wonders. Whether you prefer a high-energy speedboat ride, a private adventure, or a budget-friendly trip, there’s an option tailored for you. For a lively group experience, the Laganas Bay Speedboat Tour delivers excitement and wildlife sightings. If you’re after personalized attention, the Private Boat Tour makes for an unforgettable outing.
No matter which tour you choose, booking in advance will help secure your spot, especially during peak season. Dive into Zakynthos’ waters, snap some photos, and enjoy the thrill of spotting Caretta caretta turtles in their natural environment. Happy sailing!
