Lisbon: Sesimbra Underwater Exploration by Seaview Board

Imagine floating comfortably on a see-through board, gliding along Portugal’s stunning coastline, and peering down into the vibrant world beneath the waves—all without needing scuba gear. That’s exactly what the Sesimbra Underwater Exploration by Seaview Board offers. For just $80 per person, you get about 2 hours of fun, adventure, and a chance to see marine life up close—no wetsuit required.

This tour takes place in the Lisbon District, specifically from the scenic Arrábida Natural Park near the charming fishing village of Sesimbra. The activity is suitable for all ages, including those who aren’t confident swimmers, thanks to the buoyant, transparent boards that make floating and observation easy and safe. The guides here are notably friendly and knowledgeable, adding a personal touch that makes this experience stand out.

Two standout features make this tour particularly appealing: First, the underwater view through the porthole is a real highlight—an affordable, low-pressure alternative to scuba or snorkeling that still offers an authentic glimpse into marine life. Second, the small group size (limited to 10) means you’re not just another face in a crowd, ensuring more personalized guidance and attention.

One thing to keep in mind: if you’re looking for an activity that involves extensive swimming or physical exertion, this may not suit you. Also, those with mobility issues or in wheelchairs should note that the activity requires some mobility but isn’t designed for wheelchair access.

This tour is perfect for families, first-time marine explorers, or anyone curious about Portugal’s underwater world without the commitment of scuba gear. If you enjoy guided experiences with a personal touch and a focus on learning about local marine species, this adventure will likely resonate with you.

Key Points

• Underwater Views: See marine life through a porthole in a see-through board—ideal for non-divers.
• Family-Friendly: Suitable for all ages, especially those who aren’t experienced swimmers, thanks to buoyancy assistance.
• Expert Guides: Guides are friendly and knowledgeable, enhancing the experience with explanations and local insights.
• Flexible Booking: Reserve now and pay later, with options to cancel up to 24 hours in advance for a full refund.
• Small Groups: Limited to 10 participants, ensuring a more intimate and personalized experience.
• Convenient Location: Starts at the scenic coast near Sesimbra, accessible via hotel pickup if you choose that option.

You can check availability for your dates here:

A Deep Dive into the Experience

The Itinerary: What to Expect

The adventure begins at a conveniently located meeting point in Lisbon’s vicinity, at the Seaview Board operator’s office on Av. dos Náufragos—a recognizable spot near the TicTic restaurant. From there, you’ll head out along the coast, passing through cliffs and lush greenery, heading toward the picture-perfect beaches of Sesimbra.

Once at the starting point, your guide will give a brief but thorough introduction on how to use the Seaview boards. The good news: you don’t need to be a seasoned swimmer. The buoyant boards are designed for comfort and stability, making floating effortless. You’ll be wearing fins, which help propel you along the coastline, while your body remains comfortably supported on the transparent surface.

Underwater Exploration: Marine Life and Scenery

The main attraction is, of course, the underwater porthole—a window into Portugal’s rich marine ecosystem. During the swim, you’ll be able to spot a variety of fish: golden grey mullet, seabass, golden fish, and seabreams—white and zebra-striped. The guides often point out less common species such as the long-snouted seahorse or the John Dory, which gets a special mention for its distinctive appearance.

The scenery along the coast is equally impressive—cliff faces, rocky coves, and clear blue waters. It’s a visual feast that makes the entire experience more memorable. The guided aspect adds a layer of appreciation, especially when the guide takes the time to explain local marine species and their habits, making it educational as well as fun.

Practical Details and Comfort

The activity typically lasts about 2 hours, including transportation to and from the site if you opt for hotel pickup. The small group size means plenty of space to move comfortably and ask questions. The professional instructor stays with you, ensuring safety and giving tips along the way. Snacks and water are provided, so you stay refreshed after your swim.

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What to Bring and Wear

You’ll want to come prepared with a passport or ID, a change of clothes, towel, and sandals for after the activity. A waterproof camera can help capture the underwater views, and biodegradable sunscreen is recommended—both for your skin and the environment.

The Reviewer’s Perspective

From reviews, it’s clear that guides like Annabelle make a difference, taking the time to explain what’s around us and making everyone feel comfortable. One reviewer praised the “very interesting aquatic excursion with a guide who explains what’s around us,” emphasizing the educational value of the tour.

Why This Tour Is Worth Considering

At $80, the value of this tour hinges on the experience of combining adventure, education, and scenic beauty in one package. For those who want to see marine life without the hassle of diving certification or snorkeling gear, this is a practical choice. The small group size also ensures a more personalized experience, which can be hard to find in larger tours.

It’s particularly appealing if you’re traveling with family or friends and want a relaxing, guided outdoor activity that combines coastal scenery with marine observation. Also, for travelers seeking a low-impact, accessible introduction to Portugal’s underwater life, this tour hits the right notes.

The Sum Up

The Sesimbra Underwater Exploration by Seaview Board offers a unique blend of comfort, education, and adventure, making it a worthwhile addition to your Lisbon-area itinerary. Its affordability and family-friendly nature provide excellent value, especially considering the personalized guides and stunning coastal views.

While it’s not suited for those with mobility issues or seeking a physically demanding activity, it’s perfect for curious travelers eager to peek beneath the surface and learn about marine life in a relaxed setting. The small group format ensures a more intimate experience, and the underwater porthole creates a captivating window into the ocean’s secrets.

For anyone wanting a light, engaging, and scenic introduction to Portugal’s coast, this tour is a smart choice. It’s especially well-suited for first-time visitors or families looking for a memorable, educational outing that doesn’t require heavy equipment or extensive training.

FAQ

Is there an age limit for this tour?
Children must be accompanied by an adult, but specific age restrictions aren’t mentioned. It’s best to check directly with the provider for exact age guidelines, especially for very young children.

Do I need to be a confident swimmer?
No, you don’t need to be an experienced swimmer. The buoyant, see-through board helps with floating and balance, making it accessible even for beginners.

What should I bring?
Bring your passport or ID, a change of clothes, towel, sandals, waterproof camera, and biodegradable sunscreen. These items will ensure you’re comfortable and able to capture the experience.

Is hotel pickup included?
It’s an optional add-on. If you select the hotel pickup and drop-off option, it’s provided. Otherwise, you’ll meet at the designated starting point.

How long does the activity last?
The total experience lasts about 2 hours, including transportation if you opt for pickup. The actual swimming/exploration part is roughly that duration.

What languages are guides available in?
Guides speak Dutch, French, English, Portuguese, and Spanish, making it accessible for many travelers.

Can I cancel this tour?
Yes, you can cancel up to 24 hours in advance for a full refund, providing flexibility if your plans change.

In all, this tour provides a wonderful way to experience Portugal’s coast from a different perspective—viewing underwater life safely, comfortably, and with expert guidance. Whether you’re a family, a solo traveler, or just curious about marine ecosystems, it’s a memorable, value-packed outing in the Lisbon area.

You can check availability for your dates here: