Kos is a fantastic base for boat tours—its strategic location in the Dodecanese means you’re never far from a beautiful island, a secluded cove, or a lively port. Whether you’re after a relaxing day of swimming in crystal-clear waters, exploring traditional villages, or soaking up the sun on a luxurious vessel, Kos offers options for every traveler. We especially like the Full Day Boat Cruise to 3 Islands because it combines sightseeing, snorkeling, and Greek hospitality all in one 7.5-hour trip. Watching dolphins and enjoying fresh Greek food onboard makes it hard to beat for value and fun. If you’re after a more adventurous twist, the Pirate Cruise with Waterslide offers a splashy day on a pirate-themed vessel, perfect for families or kids at heart.
While each tour varies in style and focus, they all give a chance to see beyond Kos’s well-trodden streets and enjoy Greece from the water. For those seeking an upscale experience, the 3 Island Luxury Cruise offers a well-equipped boat with four swimming stops, combining comfort with adventure. For a beginner-friendly introduction to diving, the Half Day Boat Diving Experience is a small-group, hands-on course that gets you exploring underwater depths safely. Whatever your style, booking early ensures you get the best times and boats — especially in peak summer months.
Quick Overview
Kos’s boat tours span a wide range from full-day island-hopping trips (Full Day Boat Cruise to 3 Islands) to adventure-packed pirate cruises (Pirate Cruise with Lunch and Waterslide), and luxury sailing experiences (3 Island Luxury Cruise). Plus, there are specialized activities like diving lessons (Half Day Boat Diving) and private charters (Bridal Shower Hen Do Boat), catering to all levels of comfort and interests. This list balances budget-friendly options with upscale experiences, making sure you find the perfect way to enjoy the Aegean Sea around Kos.
1. From the Port of Kos: Full Day Boat Cruise to 3 Islands
For around $34, you get a 7.5-hour cruise exploring three small islands near Kos, with swimming, snorkeling, and traditional Greek food included. This trip is remarkably popular, with a 4.8/5 rating based on nearly 4,000 reviews. The boat visits Kalymnos—famous for its fjords and cliffs—and Plati, where you can snorkel and relax. You’ll cruise past fish farms, and there’s even a chance to spot wild dolphins jumping out of the water. The crew prepares a Greek buffet lunch, with vegetarian options, which many reviews praise as generous and tasty. Guests often mention how smooth the crossing is and how friendly the staff makes everyone feel. This tour is excellent for travelers who want a full day’s variety, mixing sightseeing, swimming, and authentic food. Bottom line: a fantastic value for an all-included day on the water.
2. From Kos: 3-Island Pirate Cruise with Lunch and Waterslide
This 7.5-hour adventure has a 4.5 rating from over 1,800 reviews and costs about $25. Your trip on the Barco De Pirata feels like stepping into a storybook. It’s a fun, lively cruise with a pirate theme—think music, a waterslide, and a sense of mischief. You’ll visit Kalymnos, Pserimos, and Plati, with plenty of swimming and snorkeling, although some reviews note the equipment isn’t always available as advertised. The highlight? The water slide and the chance for kids and kids-at-heart to splash around. Lunch is a traditional Greek BBQ, with meat, vegan, and vegetarian options. Many travelers appreciate the energetic crew and the casual, party atmosphere. It’s ideal for families, groups, or anyone who wants a relaxed, fun-filled day with a splash of adventure. Bottom line: a lively, value-packed trip with lots of chances for fun in the sun.
3. Kos Town: Kalymnos & Pserimos Day Cruise & Optional Transfer
Costing about $32, this 7.5-hour trip is perfect if you prefer a more relaxed pace. It includes optional transfers from Kos town, making logistics easier. You’ll visit Pserimos for tranquility and Plati for swimming, plus explore Vathy, an impressive fiord-like village on Kalymnos. The boat stops at each island for about an hour, giving you time to wander, swim, and enjoy local treats, including fresh orange juice. Many reviews mention the peaceful bays and the chance to snorkel, making it a good choice for those who want a less hectic day. The included lunch features traditional Greek dishes, and the scenery along the way is often described as stunning. This tour suits travelers who want to combine sightseeing with leisure, in a comfortable setting. Bottom line: a peaceful, authentic experience suited for nature lovers and those wanting a gentle day.
4. 3 Island Luxury Cruise with 4 Swimming Stops with Captain Morgan
At number 4, this luxury cruise offers a premium experience aboard the newest vessel—Captain Morgan, built in 2024 with a capacity for 300 passengers. It combines comfort, style, and plenty of swimming opportunities in a 7-hour voyage. Four stops for swimming and snorkeling, plus dolphin watching off Kalymnos, make this trip stand out. The boat features sun decks, shaded areas, and two well-stocked bars. Guest reviews rave about the “great lunch,” “friendly crew,” and “beautiful islands.” The large size of the vessel means it’s suitable for those who prefer more space and amenities onboard. It’s ideal for travelers wanting a luxurious, yet relaxed day at sea with many chances to swim and take photos. Bottom line: a comfortable, stylish choice for a full-day adventure with high-end touches.
5. Full Day Boat Cruise to 3 Islands with optional pickup
This 8-hour trip costs about $35 and is popular for its value and inclusiveness. It explores Pserimos, Vathi on Kalymnos, and Plati—each offering different scenery and swimming spots. The boat visits Pserimos, a tiny island with just 130 residents, perfect for a peaceful stroll or a swim. The cruise is praised for its smooth crossing and friendly crew, with many mentioning dolphins seen along the way. The included Greek lunch is fresh and plentiful. Guests appreciate the flexibility to swim, snorkel, or simply relax onboard. It’s a good option for families or those with limited time but wanting a full taste of the islands. Bottom line: a well-organized, affordable day trip with natural beauty and relaxed pace.
6. Barco De Pirata Cruise at 3 Islands in Greece
For about $35, this 7.5-hour pirate-themed cruise combines efficient island-hopping with fun. The ship’s pirate look and lively atmosphere appeal to all ages. It visits Kalymnos, Pserimos, and Plati, with swimming, snorkeling, and a traditional Greek barbecue included. Many reviewers highlight the “great food,” “friendly crew,” and “dolphin sightings.” The boat’s unusual theme turns the trip into an experience, not just a standard cruise. The large vessel means comfort, but it can get crowded, so early booking is recommended. It suits families or groups wanting a lively, memorable day at sea. Bottom line: a fun, themed adventure offering good value with plenty of swimming and good food.
7. Kos: Small Group Full-Day Sailing with Meal, Drinks, & Swim
Costing about $158 per person, this small-group sailing trip is a premium choice. It includes a fully-cushioned Greek-made sailing boat, a delicious lunch, drinks, and stops in secluded bays for swimming and snorkeling. The intimate atmosphere makes it perfect for couples or small groups seeking personalized service. Guests praise the “beautiful bays,” “delicious food,” and “exceptional guides.” It’s a slower, more exclusive experience, ideal for travelers who appreciate comfort and a quiet pace in beautiful surroundings. Some reviews mention how the crew shares interesting local stories. The main downside is the price, but many say it’s worth it for the quality and personalized service. Bottom line: an ideal choice for those seeking a relaxed, intimate day on the water.
8. From Kos: A full day cruise in the newest luxury vessel!
This 7-hour cruise features a brand new vessel built in 2024, with four stops for swimming and sightseeing. The boat has multiple decks, sun lounges, and a bar, making it perfect for comfort and fun. The itinerary includes Platy Island, Vathy on Kalymnos, Pserimos, and a surprise stop. Reviewers mention the “brilliant crew” and “beautiful destinations,” praising the “well-organized” experience. It’s suited for travelers willing to spend a bit more for a luxurious day out. The main appeal is the modern vessel and flexible stops, providing a balance of relaxation and exploration. Bottom line: a top-tier choice for those seeking a premium, all-inclusive day afloat.
9. Half day boat diving experience for beginners in Kos Greece
Costing about $110, this small-group diving experience is perfect for beginners wanting to try something new. Led by an instructor, you’ll learn the basics on a boat trip to Pserimos Island, then practice in the clear waters. The gear is included, and the experience lasts approximately 5.5 hours. Many reviews highlight how clear the waters are and how the instructor helped overcome initial fears. It’s ideal for those who prefer active, hands-on experiences over passive sightseeing. The limited group size ensures personalized attention. The main drawback? It’s only suitable for beginners or those comfortable with snorkeling. Bottom line: a great intro to scuba diving for first-timers, combining safety with fun.
10. Full-Day 3 Island Cruise Tour in Kos Island
This full-day cruise costs about $45 and covers Platy, Kalymnos, and Pserimos. It is especially appealing for dolphin watchers, with chances to see these intelligent creatures as you cruise between islands. The boat offers Wi-Fi and restrooms, making it comfortable for long hours. Many travelers comment on the “excellent stops,” “friendly staff,” and “delicious lunch,” which is included. The cruise visits each island for around two hours, giving ample time for swimming, exploring, or relaxing. This tour suits travelers who want a full immersion in multiple islands with some creature sightings thrown in. Bottom line: a well-rounded, value-driven trip for a full day of island exploration.
11. Dory’s Glass Bottom Boat Adventure in Pserimos and Pserimos Beach
At just $27, this 2.5-hour trip offers a unique chance to see underwater life without getting wet. The glass-bottom boat allows you to observe fish and shipwrecks around Pserimos from a comfortable, shaded vessel. Many reviewers mention how the kids loved the fish viewing, and how the boat’s stability made it accessible. It’s perfect for families or those short on time but eager to see marine life. Stops include Pserimos Beach, where you can swim or relax. Highlights include interesting photo opportunities and the chance to see a real shipwreck. Bottom line: a fun, educational, and quick option with guaranteed underwater views.
12. The Santa Maria Full-Day Island Cruise in Aegean Sea
This 7.5-hour trip costs roughly $45 and visits Platy, Kalymnos, and Pserimos. It features dolphin watching, a traditional barbecue lunch, and stops for swimming. Many reviews mention the “relaxing atmosphere,” “friendly staff,” and “beautiful beaches.” The boat is spacious, and the stops allow for ample time to explore or unwind. It’s a good choice for travelers who want a comprehensive experience, mixing sightseeing, swimming, and local flavors. The included lunch and dolphin sightings add to the value. Bottom line: an enjoyable, all-in-one day trip with good comfort and a friendly vibe.
13. Kos: 3-Island Cruise with Lunch and Hotel Transfer
This 8.5-hour cruise offers a hassle-free experience with hotel transfers, costing about $50. It covers Platy, Kalymnos, and Pserimos, with stops for swimming and sightseeing. The boat features a bar onboard, and many reviews mention how smooth and well-organized the experience is. Visitors enjoy seeing dolphins, exploring small villages, and tasting local products like honey and orange juice. The included lunch is traditional Greek fare, making it a good value for those wanting convenience and variety. Suitable for travelers who prefer comprehensive, guided tours with transportation. Bottom line: excellent for those wanting a worry-free, full-day adventure.
14. A Day’s 3-Island Cruise Tour with Transfer
Costing about $48, this 8-hour trip has a perfect 5-star review rating. It’s a favorite for its easy, stress-free setup and flexible stops. You’ll visit Platy, Kalymnos, and Pserimos—each offering unique views and swimming spots. Many reviewers praise how friendly and helpful the crew is, with comments about the beautiful beaches and delicious local food. It’s especially good for travelers who want a relaxed, guided experience with the comfort of transfers included. The itinerary includes snorkeling, exploring, and some free time to relax. Bottom line: a highly rated, relaxing choice if you prefer a simple, well-organized day.
15. Private Full-Day Bridal Shower Hen Do Boat Cruise in Kos
This private charter costs about $1,620 for up to 10 people and offers a truly customizable experience. Perfect for a special celebration, this cruise takes you to Pserimos, with its pristine beaches and clear waters. You can tailor the itinerary, enjoy privacy, and celebrate in style. Reviewers mention how the personalized, relaxed environment made it a memorable event. It’s ideal for groups wanting exclusivity—perfect for bridal parties or family reunions. Keep in mind that booking early is recommended to secure your preferred date. Bottom line: a luxurious, flexible option for special occasions that makes your group’s dreams come true.
How to Choose Your Perfect Boat Tour in Kos
When deciding, consider your budget, interests, and whether you want a luxury experience or a budget-friendly day. For example, if you prefer a full day of island hopping with swimming and Greek food, the Full Day Boat Cruise to 3 Islands offers excellent value. Traveling with kids? The pirate-themed Pirate Cruise provides fun and splashy entertainment. Looking for a more intimate and comfy experience? The Small Group Sailing is a good pick for a relaxing day with personalized service.
Booking early, especially in peak season, guarantees your spot and preferred times. Think about whether you want a full-day adventure, a special celebration, or a shorter sightseeing trip — each offers a different perspective on Kos’s beautiful waters.
Final Thoughts
From budget-friendly day trips exploring multiple islands to luxury cruises with all the comforts, Kos has a boat tour for everyone. Families and adventure lovers will find plenty of options, while those seeking a peaceful escape might prefer a smaller, more intimate sailing experience. If dolphins or snorkeling are high on your list, look for tours that mention these highlights. And don’t forget—booking early means better choices and smoother planning. Dive in and enjoy your time on the water!