Introduction

If you’re looking to see Portugal’s coastline from a fresh, exhilarating perspective, the Sesimbra: Clear Boat Experience is a fascinating choice. This tour offers a chance to glide over crystal-clear waters in a one-of-a-kind fully transparent boat, letting you enjoy the scenery without getting your feet wet or underwater gear.
What we love about this experience is the unique viewpoint it provides — you get to see the underwater world from the comfort of the boat, soaking in the stunning landscapes and marine life. Plus, the small-group setting makes it feel intimate and exclusive, perfect for those who want a more personal connection with nature. The opportunity to swim in pristine waters and visit hidden beaches is another huge plus.
That said, a potential drawback is that this experience might not suit everyone—it’s not recommended for children under 3, pregnant women, or anyone with mobility issues or seasickness. Still, if you’re eager to explore Sesimbra’s coast from a different angle, this tour promises a memorable outing.
You can check if your dates are available here:Who is this tour best suited for?
This tour is ideal for travelers who love scenic views, marine wildlife, and a touch of adventure, all in a relaxed setting. It’s perfect if you want to avoid crowded boat trips and prefer a more intimate, eco-friendly vibe.
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Good To Know

- Innovative design: The fully transparent boat offers a unique viewing experience of the underwater world.
- Stunning scenery: Expect breathtaking views of Sesimbra’s coast, including secret beaches and caves.
- Marine life observation: You can watch marine creatures from the boat, with an opportunity to swim in clear waters.
- Small group experience: Ensures comfort, personalized attention, and a more authentic connection with the sea.
- Eco-conscious: The transparent boat’s design respects the environment and enhances natural beauty.
- Flexible booking: Cancel up to 24 hours in advance and book now, pay later for flexibility.
What to Expect: An In-Depth Look

Starting Point and Safety Briefing
The experience kicks off at the Sesimbra Harbour, where you’ll meet your guide—likely a multilingual host who will give a brief safety overview. This 10-minute session covers everything from boarding procedures to safety instructions, setting the tone for a relaxed yet organized ride.
More Great Thing To Do NearbyScenic Coastal Ride in a Glass-bottom Boat
The tour begins with a scenic cruise along Sesimbra’s rugged coast. The glass-bottom feature means you’ll catch glimpses of marine life and seabed formations even as you sail. Travelers have noted that the views are “stunning” and that the boat’s design makes it feel like you’re floating above the underwater world.
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The Highlight: Praia do Ouro and Praia do Ribeiro do Cavalo
The boat then heads toward Praia do Ouro and Praia do Ribeiro do Cavalo, two of the region’s prettiest beaches. These stops are the main attractions, offering photo opportunities and time for a swim. The water here is described as “crystal clear,” with one reviewer saying, “You can see all the way to the bottom—it’s like swimming in a giant aquarium.”
The 30-minute swim at each beach allows you to relax in the pristine waters and enjoy the marine environment from a different vantage point. Be sure to bring your snorkel gear if you want to get an even closer look at the underwater life, though it’s not provided.
Secret Stop and Additional Scenic Views
The tour includes a “secret” stop—a less accessible, quieter spot perfect for photography and soaking in the scenery. This part of the trip often surprises travelers with its secluded charm and untouched beauty. The boat’s ability to access hidden coves and caves makes this tour a real treasure hunt along the coast.
Return to Sesimbra
After about 1.5 to 2 hours, the boat heads back to the harbor. The small group size means everyone gets ample time to ask questions, take photos, or simply enjoy the peaceful views. Reviewers mention that the experience leaves them with a feeling of deep connection to the marine environment.
The Boat and Equipment

Constructed from colorless, transparent material, the boat itself is a marvel. It’s designed to blend into the environment, respecting the landscape while providing optimal visibility. Passengers are asked to remove shoes and store belongings safely in a designated box, which helps keep the boat in pristine condition.
Being fully transparent, the boat requires minimal equipment—just bring your essentials like camera, sunscreen, towel, and snacks. Since the boat is quite minimalistic, bringing fewer items makes your experience smoother. Those prone to seasickness should consider bringing medication because the boat’s gentle pace and sheltered waters generally keep motion sickness at bay.
The Itinerary in Detail
Safety & Boarding
The tour starts with a brief safety talk and the opportunity to ask questions before boarding the sleek, transparent vessel. This preparation ensures everyone feels comfortable to enjoy the ride.
Coastal Views & Marine Observation
Expect to see breathtaking vistas of Sesimbra’s coastline, with towering cliffs and lush greenery. As you cruise, you’ll notice the clarity of the water—something that reviewers emphasize as a highlight. During the ride, marine creatures might be visible beneath your feet, thanks to the boat’s see-through bottom.
Praia do Ouro and Praia do Ribeiro do Cavalo
These beaches are known for their unspoiled beauty and calm waters. The swim here is a key part of the experience—many mention it as a highlight. One reviewer commented, “The water is so clear you can see fish swimming around you,” which adds a magical touch to the experience.
Secret and Scenic Stops
The “secret” stop is often regarded as the quietest, most picturesque part of the tour. You’ll have a chance to take photos without crowds and enjoy the serene environment.
Cost and Value
While the price isn’t explicitly mentioned here, the experience seems to offer good value considering the uniqueness and exclusivity. With the ability to observe marine life, swim at beautiful beaches, and access secret coves, this tour packs a lot into its duration.
The small group size, guided experience, and environmentally conscious boat design all add to its appeal. Plus, the flexibility of canceling up to 24 hours in advance and booking without immediate payment offers peace of mind.
Practical Tips for Your Trip

- Bring a hat, sunscreen, and water—the sun can be strong during the boat ride.
- Snacks and a camera are recommended to capture the views.
- Swimwear and a towel are essential if you plan to take a dip.
- Leave bulky or fragile items at home, as the boat’s surface should be preserved.
- Seasickness tablets are advisable if you’re sensitive to motion.
- Arrive at least 10 minutes early to ensure a smooth start.
The Sum Up
The Sesimbra: Clear Boat Experience offers a fresh take on coastal exploration, blending the thrill of a transparent boat with the tranquility of hidden beaches and marine wildlife. It’s a well-balanced adventure that combines stunning views, eco-conscious design, and intimate group sizes to create a memorable outing.
This tour suits travelers eager to see Portugal’s coast in a new light—those who appreciate natural beauty, want to avoid busy boat trips, or are curious about marine life from an unusual vantage point. It’s especially ideal for those who want a smooth, relaxing experience with plenty of opportunities for photos and swimming.
While it may not be suitable for everyone—particularly those with limited mobility or seasickness issues—it’s a rare chance to enjoy Sesimbra’s coast in an innovative, environmentally friendly way. Whether you’re a family, couple, or solo traveler, this outing can turn an ordinary day into a truly extraordinary memory.
FAQ
How long does the tour last?
The tour duration is approximately 1.5 to 2 hours, with availability depending on the schedule.
What is included in the tour?
The experience includes the coastal boat ride, opportunities to swim, and marine wildlife observation, all in a small group setting with insurance included.
Are food and drinks provided?
No, food and drinks are not included. You should bring snacks and water for your comfort.
Can I book a private group?
Yes, private groups are available, which is perfect for special occasions or more personalized experiences.
Is the tour suitable for children?
It’s not recommended for children under 3 years, and non-swimmers, pregnant women, and those with certain medical conditions should consider their suitability before booking.
What should I bring?
Bring a hat, swimwear, towel, camera, snacks, sunscreen, and water. Remember to wear shoes that can be removed before boarding.
What if I get seasick?
If you’re prone to seasickness, it’s advisable to bring motion sickness tablets.
What happens if the weather is bad?
In case of strong winds or unfavorable sea conditions, the tour may be rescheduled for safety and comfort.
In essence, the Sesimbra: Clear Boat Experience offers a creative, scenic, and intimate way to explore Portugal’s coast. Perfect for those who want to see the underwater world in a new way and enjoy peaceful, picture-perfect beaches—all while respecting nature’s beauty.
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