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Discover mesmerizing caves and crystal-clear waters on the Sesimbra and Espichel Grotto Boat Tour, a perfect mix of adventure, scenery, and authentic Portugal.
Travelers often seek unique ways to explore Portugal’s stunning coastline, and this boat tour along the Sesimbra and Espichel coast delivers just that. Spanning approximately 2.5 hours, it promises an engaging journey through limestone formations, sea caves, and protected waters teeming with marine life. With a friendly crew, knowledgeable guides, and plenty of photo-worthy sights, it’s a popular choice for those looking to combine adventure with natural beauty.
What we particularly love about this experience is how accessible and well-organized it is—making it ideal for a wide range of travelers. The small-group vibe, the chance to snorkel in pristine waters, and the variety of geological sights keep the journey lively and memorable. One thing to note, however, is that the tour’s duration means you’ll need to plan for a quick but packed exploration of the coast—so if you’re craving a full-day adventure, this might be just a part of your day rather than the whole story.
This tour suits nature lovers, photography enthusiasts, and anyone who appreciates a good mix of scenic cruising and geological discovery. It’s also a great option for families or friends wanting a relaxed, yet engaging maritime experience.


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The tour begins at Bolhas Tours, a convenient departure point in Sesimbra. From the moment we arrived, it was clear that this was a well-organized operation. The safety briefing, lasting around 15 minutes, set a reassuring tone with clear instructions and an introduction to the coastline’s geological highlights. The crew was friendly, professional, and attentive, which really made us feel at ease about venturing out onto the water.
Once underway, the boat glided smoothly along the coast, offering front-row seats to some of the most impressive limestone formations Portugal has to offer. The guides provided insightful commentary in multiple languages—English, French, Spanish, and Portuguese—making sure everyone could follow along.
The cruise itself lasts around 20 minutes before we reached the first highlight: Ribeiro do Cavalo Beach. This small, secluded cove is a perfect photo stop and a taste of what’s to come. The clear waters here hint at the marine richness awaiting us.
The real star attractions are the caves and formations along the coast. The Tamboril Grotto was our first stop — a stunning cave bathed in natural light from above, with waters so transparent you could see straight to the bottom. Reviewers mention the “zenithal lighting” inside, which makes for some incredible photos and a magical atmosphere.
Next, we moved to the Frade Grotto — notable for its sheer size and dramatic entrance. It’s one of the biggest caves in the area, and exploring it gave us a sense of the raw power of marine erosion shaping these cliffs over millennia. The Mesas formations, created by marine erosion, added a surreal touch to the landscape, resembling flattened table-like structures along the coast.
One of the more striking sights is the Arco da Pombeira Grotto, a monumental archway carved into limestone—an ideal spot for photos and marveling at nature’s artistry. Reviewers highlighted Bifa, a natural geyser-like feature at the Cape’s foot, where seawater is expelled in a manner that resembles a geyser, adding a touch of spectacle to the rocky scenery. One guest noted, “Watching the sea being expelled here was like witnessing natural magic—completely unexpected and utterly fascinating.”
After exploring the caves, the tour winds down with an optional visit to Baleeira Bay. Here, the waters are crystal clear, calm, and teeming with sea life—making it ideal for swimming or snorkeling. The touring crew provided masks and snorkels, and reviews mention how pristine and inviting the bay’s waters are. A guest commented, “It felt like swimming in a giant aquarium—so peaceful and full of colorful fish.”
The itinerary includes several scenic stops along the coast—each offering brief guided explanations and photo opportunities. The short stops at CVH8+MC, CVH3+MR, and CQ6R+32 provide glimpses into the landscape’s geological diversity and allow travelers to capture the moment.
The journey concludes back at Bolhas Tours, with easy disembarkation. Many reviews praise the overall value, noting the inclusion of snorkeling gear, drinks, and the friendly guide as adding significant value for a $62 price tag.


This boat trip appeals to nature lovers and those curious about geology. It’s perfect for travelers wanting a scenic, relaxed experience with plenty of opportunities to photograph and snorkel. Families, couples, and friends will enjoy the friendly atmosphere and the chance to see Portugal’s coast from a different perspective. If you’re after a quick, engaging adventure that combines stunning scenery with marine activity, this tour ticks all boxes.

For $62, you get a well-organized, scenic cruise with knowledgeable guides, access to breathtaking caves, and the chance to swim in crystal waters. It’s an excellent way to spend a half-day exploring Portugal’s natural coastline while avoiding the more commercialized or crowded options. The mixture of geology, wildlife, and cultural insights makes it an enriching experience that’s more than just a boat ride.
If you’re looking for a manageable, authentic, and visually striking tour in the Lisbon District, this trip offers genuine value. It’s particularly suited for those who want a blend of adventure and relaxation without committing a full day or incurring hefty costs.
Is transportation included in this tour?
The tour departs from Bolhas Tours in Sesimbra, and transportation is provided from this meeting point. It’s a boat tour, so no land transport is included beyond the meeting location.
Can I snorkel during the tour?
Yes, snorkeling equipment (masks and snorkels) is provided, and you are encouraged to explore the waters of Baleeira Bay, which are noted for their clarity and marine life.
Is the tour suitable for children or families?
Yes, the experience is generally family-friendly, and the tour’s shorter duration makes it manageable for children. The crew is attentive, and the environment is safe and accessible.
What should I bring with me?
Bring sunscreen, a hat, sunglasses, and a towel if you plan to swim. A waterproof camera or phone case can help you capture moments without worry.
How many people typically join this tour?
Reviews suggest it’s a small-group experience, which enhances the feeling of intimacy and allows guides to give more personalized attention.
What if the weather is bad?
The tour offers free cancellation up to 24 hours in advance, so check the weather forecast and plan accordingly. The guide will advise on safety if conditions are unsuitable.
This boat tour in Sesimbra offers a compelling balance of scenic beauty, geological intrigue, and marine fun. Whether you’re snapping photos of limestone arches or floating in clear waters, it’s a memorable way to experience Portugal’s coast.