Turtle Watching in Boa Vista: Season, Tours & Rules

Loggerhead Turtle Watching in Boa Vista: Season, Rules & Night Tours

One of the world's great turtle nesting grounds, how to see it responsibly, and why the rules matter.

Every summer, thousands of female Loggerhead turtles (Caretta caretta) haul themselves out of the Atlantic onto Boa Vista's dark, empty beaches to lay their eggs. It is the island's most remarkable wildlife spectacle, and the one experience here that comes with genuine responsibilities attached.

At a Glance: Quick Overview

Global Importance: Cape Verde hosts the third largest loggerhead nesting aggregation in the world, after the south-eastern United States and Oman, and around two-thirds of all nesting activity in Cabo Verde takes place on Boa Vista.

Nesting Season: Roughly June/July to October.

Hatching Season: Roughly August to December.

Key Nesting Beaches: Ervatão, João Barrosa, and stretches of Santa Mónica, Chaves, and the south coast.

How to See It: Only on a guided night tour with a certified conservation organisation.

Section 1: Why Boa Vista Matters

The numbers here are not tourist-brochure exaggeration. This island genuinely is one of the most important loggerhead sites on Earth.

A Globally Significant Rookery. Cape Verde holds the only major loggerhead nesting aggregation in the eastern Atlantic, and Boa Vista is its heart. In the 2017 season, around 43,500 loggerhead nests were counted across the archipelago, more than half of them (some 23,000) on Boa Vista, followed by Sal and Maio.

Why Here. The island's long, dark, largely undeveloped beaches are exactly what nesting turtles need: no artificial light, little human activity at night, and favourable Atlantic currents offshore. The same emptiness that makes Santa Mónica unsuitable for swimming makes this coastline ideal for turtles.

Natal Homing. Adult females return to nest on or near the beaches where they themselves hatched decades earlier, navigating thousands of kilometres of open ocean to get back. It's one of the reasons protecting specific beaches matters so much: a lost nesting beach isn't easily replaced by another.

Section 2: The Nesting Cycle

Understanding what you're watching makes the experience far more meaningful, and the rules more obviously necessary.

Coming Ashore. Females emerge at night, drag themselves up the sand above the tideline, excavate a chamber with their rear flippers, and lay a clutch of roughly a hundred eggs before covering the nest and returning to the sea. A single female typically lays several clutches across one season, then doesn't nest again for a few years.

Incubation. Eggs incubate in the warm sand for around two months. Sand temperature determines the sex of the hatchlings, with warmer nests producing more females, which is why rising temperatures are a genuine long-term concern for the species.

The Dash to the Sea. Hatchlings emerge together, usually at night, and scramble across the sand toward the brightest horizon, which should be the ocean reflecting the sky. Only a small fraction survive to adulthood, and anything that misdirects them, above all artificial light, kills them before they reach the water.

Section 3: When to Visit

Timing decides what you'll see.

Peak Nesting (June to October). The highest density of nesting females is generally in the middle of this window, through July and August. This is when tours focus on watching adult turtles come ashore and lay.

Hatching (August to December). As the season progresses, attention shifts to hatchlings emerging from nests and making their way to the sea. Late in the year, tours are more likely to involve hatchling releases than nesting females.

Night Tour Timing. Tours typically run between mid-evening and around midnight, scheduled around tides and low human activity on the beaches. Expect a late night and a long drive.

Section 4: The Rules, and Why They Exist

Every rule on a turtle tour exists because breaking it demonstrably harms animals. None of them are formalities.

Red Light Only. White flashlights, head torches, and bright phone screens are banned. Artificial light disorients nesting females, often causing them to turn back into the sea without laying, and it draws hatchlings inland away from the water, where they die of exhaustion or predation. Guides use low-intensity red light, which disturbs turtles far less.

No Flash Photography. Camera flashes panic and disorient turtles at the most vulnerable moment of the process. If photography matters to you, ask your guide what is permitted, and accept that the answer may be nothing.

Keep Behind and Keep Back. Once a female is laying, stay behind her and out of her line of sight. Never stand in front of a turtle or block her route to or from the water. Never touch, handle, or sit on a turtle, and never touch hatchlings.

Stay Quiet. Noise and movement disturb animals that have hauled themselves ashore at considerable effort and risk.

No Vehicles on Nesting Beaches. Driving 4x4s, quads, or buggies on white-sand beaches crushes buried nests and leaves ruts that trap hatchlings on their way to the sea. This applies whether or not it's nesting season, since nests are invisible from the surface.

Section 5: What a Guided Night Tour Involves

Book only through certified conservation organisations or their authorised partners. This is not a case where a cheaper unofficial option is a reasonable trade-off.

How It Usually Works. Tours begin with a pickup from Sal Rei or the resorts, followed by a briefing that covers the rules and what to expect. A 4x4 then takes the group along off-road tracks to a protected beach. From there it's a quiet walk with trained guides who look for fresh tracks in the sand, and, if a turtle is found in the right stage of nesting, a period of silent observation at a distance. Some tours instead visit a protected hatchery.

No Guarantees. These are wild animals. A tour may find several turtles or none, and a responsible operator will say so upfront rather than promising sightings. If an operator guarantees a turtle, that's a warning sign about how they behave on the beach.

What to Wear and Bring. Dark clothing rather than white or reflective fabrics. Sturdy closed shoes for walking in soft sand. A light jacket or windbreaker, since beach nights are cool and windy. Leave the white torch at home, and keep your phone in your pocket.

Section 6: Conservation, Law & Ongoing Threats

The recovery here is real, recent, and still fragile.

Legal Protection. Sea turtles have been protected by law in Cabo Verde since 1987, though early protections were limited and later decrees remained weak and poorly enforced for decades. Stronger national legislation and serious enforcement arrived much more recently, and eating or buying turtle meat and eggs is illegal. If you're offered either, decline and report it.

How Bad It Was. In 2007, conservation workers documented over 1,100 female turtles killed as they came ashore to nest, up to a third of the nesting population at the time. Research covering that era estimated that 36, 18, and 5 percent of nesting females were harvested across three successive study years.

How Much Better It Is Now. A long-term study has documented an 80-fold increase in loggerhead nesting activity across three major beaches on the island between 1998 and 2024, and patrol teams who once recorded five to ten nesting females a shift were counting 20 to 30 by around 2018, and 30 to 40 on some nights by 2021. That turnaround is the result of sustained patrols, community work, and enforcement.

Protection Measures. Night patrols by ranger teams, relocation of at-risk clutches to protected hatcheries, beach monitoring, and environmental education all continue. Studies of hatcheries on Boa Vista found that relocated clutches had significantly higher hatching success than nests left in place, where egg mortality was frequently over 70 percent.

Remaining Threats. Poaching, growing tourism, plastic pollution, and construction on critical nesting beaches all continue to threaten the population's long-term stability. Coastal lighting from resorts and rising sand temperatures are additional pressures.

Section 7: Summary & Visitor Checklist

Tourism is now part of why these turtles are worth more alive than dead. Booking a properly run tour puts money into patrols, rangers, and local employment, which is the mechanism that turned the situation around.

Before you go, plan your trip for June to October for nesting or August to December for hatching. Book only with certified conservation guides. Wear dark clothing and closed shoes. Use red light only, never white light or flash. Stay quiet, keep your distance, and never touch a turtle or a hatchling. Bring a jacket for the cool night. Keep vehicles off dunes and nesting sand. And never buy or eat turtle products.

Continue Planning Your Trip

For the beaches where nesting happens, read our Boa Vista Beach Guide. For excursions and getting to remote coastlines, see Getting Around Boa Vista. And for month-by-month conditions, our Boa Vista Weather, Wind & Ocean Guide covers the seasons.