If you’re looking for a way to see Portugal’s Sesimbra coast from a fresh perspective, this underwater viewing boat trip might just be your next favorite adventure. With a rating of 5.0 from 27 reviews and a perfect 100% recommendation rate, it’s clear that travelers find this experience both enjoyable and memorable. It’s a perfect blend of scenic beauty, educational insight, and a dash of fun that fits into a relaxed two-hour window.
What we love most about this tour is its unique panoramic underwater windows—a feature that offers a rare, close-up look at marine life and the rocky seabeds below. Add to that the chance to explore hidden beaches like Praia da Ribeira do Cavalo, and you have a recipe for a day full of stunning views and authentic local stories. Plus, the friendly, knowledgeable guides make the journey even more enjoyable.
One potential consideration is that food and drinks are not included, so you’ll want to bring your own snacks or plan to explore local eateries afterward. This tour suits those who enjoy scenic boat rides, snorkeling, or simply want a relaxing way to learn about the area’s maritime culture. It’s especially ideal for families, solo travelers, or anybody eager to discover Portugal’s coast from a different angle.
Good To Know

- Spectacular underwater views through panoramic windows provide a rare glimpse of marine life.
- Local guides share insights into the region’s traditions, cuisine, and fishing culture.
- Hidden beaches like Praia da Ribeira do Cavalo are featured stops with rich scenery.
- The tour is affordable at around $30, offering excellent value considering the views and experience.
- The two-hour duration strikes a good balance between sightseeing and relaxation.
- Photos and Instagram frames are included, helping you remember this fun trip.
An In-Depth Look at the Underwater Viewing Tour

Find more activities and experiences we've covered in Setubal District.
Starting Point and Overall Experience
The tour begins at the Aquarama Port in Sesimbra, a charming coastal town known for its fishing history and stunning beaches. From there, the boat called APNEA sets off on a roughly two-hour journey that combines sightseeing, education, and underwater exploration. The boat’s standout feature is its hull with panoramic windows, allowing travelers to see beneath the waves without any diving or snorkeling skills required.
Travelers will appreciate how the boat is designed for comfort and safety, including life jackets and insurance for all participants. The small group size—with a cap of 75 people—ensures a more intimate experience, and most travelers find the pace relaxed enough to soak in the scenery.
The Itinerary: What You’ll See and Do
Local Introduction
The experience kicks off with a local guide who is a resident of Sesimbra. Based on reviews, guides like Delfino are praised for their friendliness and storytelling, which offer fascinating insights into the area’s fishermen’s traditions and local cuisine. Expect to learn how the sea has shaped Sesimbra’s culture, and perhaps swap a few tips on the best local tapas spots for after the tour.
Praia do Ribeiro do Cavalo
The first notable stop is Praia do Ribeiro do Cavalo, one of Sesimbra’s most beloved beaches. With its pristine waters and dramatic cliffs, it’s a picture-perfect place to start underwater viewing. The boat anchors here for about 10 minutes, giving everyone a chance to admire the rock formations and marine life seen through the underwater windows. Reviewers like Valdeneide_N describe this as a “genial” experience, highlighting the uniqueness of seeing the rocky landscape and sea creatures up close.
Hidden and Wild Beaches
Next, the boat heads to one of Sesimbra’s more inaccessible and wild beaches—a spot loved by local fishermen and diving enthusiasts alike. This stop offers an appreciation for the unspoiled nature of the coast, with some reviewers noting that it’s a “best place for diving/snorkeling.” Although the boat itself doesn’t snorkel here, the clear waters and rocky underwater terrain make it a great preview for those considering diving or snorkeling in the future.
Natural Beauty of Arrábida
Throughout the trip, travelers are treated to spectacular views of the Arrábida Natural Park, famous for its cliffs, coves, and lush landscapes. The boat provides a unique perspective of these natural features from the water, which can be quite different from land views. Maria_C mentioned that this was a “belle escapade en bateau”, emphasizing how the scenic backdrop made the trip especially memorable.
Underwater Views: What to Expect
The main highlight—the panoramic windows—give a real-time look at the marine biodiversity of the Professor Luiz Saldanha Marine Park, part of the broader Arrábida Natural Park. Expect to see fish, rocks, and perhaps some seaweed swaying in the current, all easily visible without any snorkeling gear. Reviewers like Andre_H rave about how “fishes are well visible under water,” which means you don’t need to be a snorkeler to enjoy the underwater scenery.
Photos and Social Media
A fun perk is that photos are included, with special frames for Instagram sharing. This makes it easy to capture your best moments—whether it’s a shot of the boat’s underwater windows or scenic vistas—without having to worry about taking your own photos during the ride.
Additional Considerations
While the tour is generally rated highly, it’s worth noting that drinks and food are not included, so packing a few snacks or water bottles is advisable, especially for those sensitive to the sun or heat. Weather can influence the experience, so it’s best to book when the forecast looks clear; if canceled due to poor weather, a full refund or rescheduled date is offered.
Who Will Love This Tour?

This experience is perfect for travelers who enjoy scenic boat rides, marine wildlife, and cultural insights. It’s particularly suited for families with kids, solo explorers, or couples seeking a relaxed, educational outing. The focus on local traditions and hidden beaches makes it ideal for those who want more than just beach lounging—they want to learn and see Portugal’s coast from a different perspective.
The Sum Up: Is It Worth It?

In a nutshell, this Underwater Viewing Tour along the Sesimbra coast offers a wonderful mix of scenery, local flavor, and marine curiosity—at a very reasonable price. The panoramic underwater windows are a real standout, providing a unique window into the lively underwater world that most travelers only see in photographs. The friendly guides and well-organized stops make this a hassle-free, enjoyable outing.
If you’re after a relaxed, scenic experience that combines natural beauty with local culture, this tour delivers on all fronts. It’s especially appealing if you love stunning coastal views and underwater vistas without the need for diving gear. For those wanting an authentic, memorable splash of Portugal’s marine life and landscapes, this trip is a smart choice.
Frequently Asked Questions

How long is the tour?
The tour lasts approximately 2 hours, making it a perfect short activity that fits well into a sightseeing day without feeling rushed.
What is included in the price?
The cost covers the boat ride, local guide, insurance, life jackets, and photos with social media frames. Food and drinks are not included, so plan accordingly.
Where do we meet for the tour?
The meeting point is at Aquarama Port in Sesimbra, Portugal. The tour concludes back at the same spot.
Is the tour suitable for children or people with limited mobility?
Most travelers can participate, and service animals are allowed. The short duration and stable boat design generally make it accessible, but it’s best to check with the provider if you have specific mobility concerns.
What should I bring?
Bring sunscreen, water, and snacks if desired. Comfortable clothing and a hat or sunglasses are also recommended, especially on sunny days.
Can I cancel if the weather is bad?
Yes, you can cancel for free up to 24 hours before the tour. If canceled due to bad weather, a full refund or alternative date will be offered.
Are there any hidden costs or extra fees?
No hidden fees are mentioned. Everything included is listed, but remember to bring your own food and drinks if needed.
This underwater viewing tour in Sesimbra stands out as a budget-friendly adventure packed with scenic beauty, marine wonders, and local stories. Whether you’re a family, solo traveler, or couple, it offers something special—views you won’t forget and plenty of photo opportunities to boot.
More Tours in Setubal District
More Tour Reviews in Setubal District
Looking for something different? Other Setubal District activities we've written about
- Boat Trip to Secret Bays and Beaches with Snorkeling
- Discover Évora Walking Tour Through History and Heritage
- Sesimbra & Nature Park Serra DA Arrabida Half Day Tour
- Taxi Boat to Ribeiro do Cavalo Beach in Sesimbra
- Lisbon: Discover Sesimbra Motorcycle sidecar Tour
- Horse rides in Évora
- Arrábida: Private Dining Experience with Wine Pairing
- Seixal: Guided Walking Tour with Pastel de Nata
- Sesimbra: Regional wood-fired food workshop with rural lunch
- Lisbon: Surf Experience at Costa da Caparica
- Boat Trip with Snorkel
- Sesimbra Walking Tour
