Keri’s coastline in western Greece is a prime spot for boat tours and cruises. With crystal-clear waters, dramatic caves, and scenic islands, it’s a playground for water lovers. Whether you’re after a romantic sunset, a private adventure, or a day exploring hidden coves, Keri has a lot to offer. We’re especially fond of the Private Sunset Cruise at Mizithres — it combines stunning views with a peaceful atmosphere, perfect for unwinding with loved ones. For those seeking total freedom, renting a boat like the Zakynthos: Boat Rental lets you explore at your own pace. All these options are easy to access with local operators offering professional guides and reliable boats. If you’re after a memorable experience, booking early is a good idea — the best tours fill up quickly in the summer months.
Quick Overview
Keri offers a variety of boat tours and cruises suited to different interests and budgets. You can choose private options with dedicated skippers or join larger group excursions to see the highlights of Zakynthos and its surrounding caves. From sunset cruises to full-day island adventures, this list covers the most popular and highly-rated options, ensuring you find something that matches your style and schedule. Check out the details below to find your perfect water adventure.
1. Private Sunset Cruise at Mizithres
This semi-private trip is perfect for those who want a memorable evening with friends or family. Starting from Laganas bay, the 3-hour cruise visits Oasis beach, Cameo Island, Marathonisi Island, and concludes with a breathtaking viewing of the sunset at Mizithres rocks. The tour includes a skipper, fuel, and free transfers, making it a smooth experience. What sets this cruise apart is the intimate atmosphere — with only a few people on board, you get personalized attention and plenty of time for photos. Reviews highlight the fun captains and the unobstructed sunset views, making it an ideal choice for a romantic or peaceful evening. At $56 per person, it offers excellent value for a private experience with stunning scenery.
Bottom Line: If you want a special sunset with a relaxed vibe, this is hard to beat, especially with free transfers and friendly guides.
2. Zakynthos: Boat Rental
For around $203 per group, the Zakynthos: Boat Rental offers true freedom on the water. You get to be your own captain for 3 hours, cruising the Ionian Sea at your own pace. The tour includes a speedboat, with stops at Oasis Beach Bar, and a 2.5-hour scenic cruise exploring secluded shores and caves. This option appeals to adventurous travelers who want to navigate independently, snorkel, or simply relax in a private setting. The reviews praise the reliability and friendly instruction, making it accessible even for first-timers. It’s perfect for families or small groups who prefer flexibility over strict itineraries.
Bottom Line: If independence and flexibility are your priorities, renting a boat allows you to craft your perfect day on Zakynthos’s waters.
3. Zante Private Boat: Marathonisi, Keri Caves, Mizitres
This 3-hour private boat tour is tailored for small groups (max 5 people) seeking a personalized experience. Your own skipper takes you to Keri Blue Caves, Marathonisi Island (famous for turtle spotting), and Mizithres Rocks. Highlights include swimming in crystal waters, exploring caves, and the thrill of spotting Caretta Caretta turtles — a highlight for nature enthusiasts. The skipper’s local knowledge ensures you visit the most photogenic spots while respecting marine life. Reviewers love the friendly guide Justin and the chance to snorkel near turtles. At $119 per person, it offers intimate access to the island’s top sights with a personal touch.
Bottom Line: This tour is ideal for small groups wanting an exclusive, tailored outing with opportunities to see turtles and explore caves up close.
4. Zante Private Boat: Keri Caves, Mizithres, Eros Cave
Spanning 4 hours, this private tour explores some of Zakynthos’s most stunning and less accessible spots. Up to five guests can enjoy exploring Keri Caves, Mizithres Rocks, and the Eros Cave, known for its heart-shaped opening. The tour emphasizes swimming, snorkeling, and scenic drives through narrow caves. Guests rave about the knowledgeable guides and the chance to visit “hidden” gems not reachable by land. Since it’s private, you set the pace and stops; it’s perfect for those wanting a relaxed, exclusive experience. At four hours, it balances sightseeing with ample swimming. The review score of 5/5 reflects the high quality and memorable views.
Bottom Line: For a longer, more comprehensive private tour with multiple caves and swimming, this is a top contender.
5. Zakynthos Private Sunset Boat: Keri Caves & Mizithres
This 2-hour sunset cruise is designed for lovers of quiet, romantic moments. Leaving from Keri Beach, the boat cruises past the Keri Caves and Mizithres Rocks as you watch the sky change colors. The trip includes swimming, scenic drives, and breathtaking views of the rock formations bathed in sunset hues. Reviewers mention the friendly skipper and the unforgettable sunset experience, with calm waters and photos that look straight out of a postcard. At a competitive price, it’s perfect for couples or small groups wanting a serene evening on the water.
Bottom Line: If you’re after a peaceful, private sunset with Instagram-worthy scenery, this cruise hits all the marks.
6. Zakynthos: Island Half Circle Boat Tour
This 7-hour adventure is a comprehensive exploration of Zakynthos by R.I.B speedboats, accommodating groups up to 9 people. The tour includes stops at famous beaches, caves, and the chance to spot turtles. With snorkeling and swimming in spots like Navagio Beach and Blue Caves, it offers a full day of activities. Reviewers appreciate the reliable boats and the guide’s local knowledge, making it easier to see more in one day. It’s suited for travelers looking for a packed day of exploration, especially those eager to cover the island’s top natural sites in one trip.
Bottom Line: Perfect for active explorers who want a lengthy, guided day of swimming and sightseeing in Zakynthos.
7. Laganas: Private boat rental with or without captain
This 3-hour private speedboat rental offers flexibility, with options to captain yourself or hire a skipper. Departing from Laganas, your route includes Marathonisi Turtle Island, and Keri Caves, with plenty of chances for snorkeling inside over 150 caves. The reviews note the personalized experience and the chance to see turtles in their natural habitat. The tour’s flexible stops make it ideal for those who want to customize their day on the water. Starting at $63 per person, it offers a good balance of privacy and adventure.
Bottom Line: If you want control over your itinerary and a chance to see turtles and caves, this private rental is a flexible choice.
$63 per person
8. Zakynthos: Cruise Around the Island & Turtles by Eurosky
This 8-hour cruise hits the highlights, including Shipwreck Beach, Blue Caves, and Turtle Island. The tour includes hotel transfers, making logistics easier. It’s perfect for travelers who want a full day seeing Zakynthos’s major sights without changing boats. The reviews, though mixed, mention the magnificent landscapes and the opportunity for marine encounters. It is well-suited for those comfortable with longer excursions who want a rundown of the island’s best spots.
Bottom Line: A solid all-day option for those wanting to see the major landmarks, especially if they appreciate convenience.
$85 per person
9. Zakynthos: Small Boat Trip to Keri, Mizithres & Marathonisi
This 7-hour boat trip from Agios Sostis emphasizes Keri Caves, swimming, and turtle spotting. The local guide also includes a lunch of local dishes, adding to the experience. It’s best for travelers who prefer a smaller group and a more relaxed pace. The review mentions the scenic drive and snorkeling as standouts. It’s an excellent choice for those wanting a balanced mix of exploration, relaxation, and local cuisine.
Bottom Line: Ideal for small groups looking for a multi-stop trip with a local flavor.
$105.36 per person
10. Zakynthos Main Port: Full-Day Cruise by Unique Pirate Ship
This 8-hour pirate-themed cruise offers a fun twist with swimming stops, visits to the Shipwreck and Blue Caves, and a lively atmosphere. The legendary ship adds an element of novelty, especially popular with families. Reviewers appreciate the organized stops and beautiful sights. It’s best suited for those wanting a lively, all-day adventure with plenty of photo ops and a bit of theatrical flair.
Bottom Line: Great for families or groups seeking a fun, full-day with a splash of pirate-style fun.
11. Glass Boat Cruises to Spot Turtles
This 3-hour glass-bottom cruise is one of the best ways to see wildlife, especially Caretta Caretta turtles. The experienced captain guides you over crystal waters to spot marine life without getting wet. Reviewers loved the close turtle sightings and the informative commentary. It’s perfect for families or anyone who wants a safe, relaxing way to enjoy Zakynthos’s underwater world. The boat’s glass bottom makes it easy to see beneath the surface.
Bottom Line: A relaxing, wildlife-focused tour that combines comfort with excellent chances to see turtles.
12. Luxury Yacht: Zakynthos | 39ft Cranchi | Private for 9 people
This luxury yacht offers a private, customizable experience for up to 9 guests. With 4 to 7 hours of sailing, you can explore secluded beaches and caves at your leisure. The yacht includes swimming, snorkeling, and optional lunch or dinner onboard. The reviews mention the yacht’s comfort and the stunning coastline views. It’s the ideal option for those wanting exclusivity, luxury, and flexibility.
Bottom Line: Perfect for small groups seeking an upscale, private experience with tailored itineraries.
13. Unique Cruise to Shipwreck Beach and Blue Caves
This 5-hour tour covers Shipwreck Beach, Blue Caves, and other local sights like Poseidon Face. It offers swimming, snorkeling, and photo stops, making it an excellent choice for travelers who want an overview of Zakynthos’s most iconic spots. The carefully curated route ensures you see both the Shipwreck and Blue Caves in one trip. Reviewers highlight the beautiful scenery and the interesting stops. It’s well-suited for those with limited time but eager to see the key highlights.
Bottom Line: Efficient, well-rounded tour for visitors who want the essentials without a full-day commitment.
14. Zakynthos: 24ft Cranchi Private Cruise for 5 People
This private 4-7 hour cruise is perfect for a small group of family or friends. It offers exploration of Zakynthos’s south coast, swimming, and snorkeling at Oasis Beach or the Keri Caves. The customizable itinerary lets you choose stops, and the boat’s size makes it easy to access more secluded spots. The reviews note the breathtaking coastline and the personalized service.
Bottom Line: An excellent intimate option for smaller groups wanting a flexible, private water adventure.
15. Zakynthos: Private Boat Tour – South Coast & Swim Stops
This 3-hour private tour offers full itinerary control, with stops at Keri Caves, Myzithres, and Marathonisi. You’ll enjoy snorkeling, swimming, and exploring in a relaxed setting. The tour appeals especially to those who want to customize their experience and have a skipper share secret swim spots. The reviews highlight the personalized attention and beautiful waters.
Bottom Line: Ideal for travelers wanting a flexible, private cruise with personalized stops.
How to Choose the Best Boat Tour in Keri
When selecting your perfect boat adventure, consider your budget, time available, and interests. For a romantic sunset, the Private Sunset Cruise at Mizithres offers a peaceful, intimate experience. If independence is key, renting a boat like the Zakynthos Boat Rental gives you freedom. For those eager to explore caves and spot turtles, private options such as Zante Private Boat: Marathonisi, Keri Caves, Mizithres deliver personalized adventures. Larger group cruises like the Full-Day Pirate Ship suit travelers seeking a lively, full-day outing.
Booking early in the season, especially during summer, ensures availability for these popular experiences. Think about your activity level — some tours involve snorkeling or swimming, while others focus on sightseeing — and pick what suits your style.
Final thoughts
Keri and Zakynthos have a rich variety of boat tours that suit nearly every traveler. Whether you prefer a private sunset cruise, a self-driven boat rental, or an all-day island exploration, there’s an option waiting. For families, the Glass Boat Cruises provide relaxed wildlife viewing, while couples may favor the Sunset Cruises. Active explorers will love the full-day tours covering multiple caves and beaches, and those seeking luxury can opt for a private yacht. Whatever your style, booking early guarantees you a spot on the water in this popular destination.