Cajueiro da Praia: Complete Guide [2026]

Cajueiro da Praia holds two rare titles at the same address: the only open-ocean manatee monitoring program on the planet and the Cajueiro Rei, a living organism approximately 200 years old with over 8,800 m² of canopy — a Guinness candidate. Eight kilometers from Barra Grande, the village is quiet, affordable, and genuinely committed to community-based ecotourism.

Quick summary: Piauí's manatee capital. Community ecotourism. Peaceful beach. Natural pairing with Barra Grande.

What Cajueiro da Praia Is

Cajueiro da Praia is a small coastal municipality in Piauí, tucked into the corridor between Parnaíba and Barra Grande. It's one of the few villages in Brazil where tourism exists almost entirely around an active conservation project: the Marine Manatee Sanctuary, managed by ICMBio, which monitors the Trichechus manatus population along the Piauí coast.

What you'll find:

Guided sailboat canoe tours for manatee observation in natural habitat — motorboats are prohibited to avoid disturbing the animals
ICMBio museum and environmental education center (CMA — Centro Mamíferos Aquáticos)
The Cajueiro Rei: a single organism confirmed by DNA sequencing (UESPI/LABMIMBIO), with a canopy of 8,832 m² according to official study — protected by Municipal Law 292/2013
Piscinas Naturais de Tombo, accessible at low tide between July and December
Long, uncrowded beach with no mass-tourism shacks
Easy access to Barra Grande (8 km)

What you WON'T find:

ATM — bring cash from Parnaíba or Luís Correia
Extensive tourist infrastructure — restaurants and guesthouses are few and simple
Public Wi-Fi — only at guesthouses
Structured kite or surf — that's Barra Grande and Macapá's role

When to Go

Period	What to Expect
Year-round	Manatee canoe tour (R$100/person) — depends on tide, departures preferably in the morning
Jul–Dec	Piscinas Naturais de Tombo accessible at low tide — crystal-clear water over stone reef
Sep–Dec	Stronger and more consistent winds; dry heat; best pairing with kite at Barra Grande (8 km)
Jan–Jun	Periodic rains, fewer tourists, lower prices — the manatee tour keeps running

Tip: The canoe tour depends on the tide. Book in advance through the Associação Peixe-Boi and confirm the departure time the day before — generally early morning, when the animals are most active at the surface.

How to Get There

Nearest airport: Parnaíba (PHB) — ~68 km, approximately 1 hour by car.

From Parnaíba, the main route follows the BR-343 toward Luís Correia and then the PI-116 to Cajueiro da Praia. The access is entirely on paved, well-maintained road — no sand stretches or ferry crossings along the way.

From Parnaíba: Most visitors arrive by private car, rental car (available at PHB airport), or private transfer booked in Parnaíba. The journey takes 50 to 70 minutes depending on the stretch. There is no direct bus line with frequent schedules.

From Barra Grande: Cajueiro da Praia is 8.4 km from Barra Grande on paved road — less than 15 minutes by car. It's common to stay in Barra Grande and visit Cajueiro da Praia for a morning, especially for the manatee tour.

From Luís Correia: About 30 km via the PI-116, approximately 35 minutes by car.

Layer 3 (app-only): Verified transfer contacts, updated prices, and direct booking are available in the Rota Insider app.

What to Do

1. Manatee Canoe Tour (Marine Manatee Sanctuary)

The main reason to come to Cajueiro da Praia is unique on the planet: observing manatees (Trichechus manatus manatus) in open ocean, in completely natural habitat, aboard traditional sailing canoes — no motors, to avoid disturbing the animals. The program is operated by the Associação Peixe-Boi in partnership with ICMBio and monitors over 60 individuals in the sanctuary area.

The tour costs R$100/person and lasts 1 to 3 hours depending on the route and tide. Morning departures are most common. Small groups, minimum 2 people. Book in advance through peixeboi.org.br or by calling the Association.

Separate from the canoe tour, the Centro de Mamíferos Aquáticos (CMA/ICMBio) has a museum with exhibits on manatee biology, a science room, and a screening room. Admission: R$10/person. Open daily.

2. Cajueiro Rei

Two kilometers from the village center stands the Cajueiro Rei — a single living cashew tree organism (Anacardium occidentale) approximately 200 years old, whose canopy spans 8,832 m² through natural vegetative propagation (branches that touch the ground, root, and generate new trunks, all genetically identical, confirmed by DNA sequencing from UESPI/LABMIMBIO). The municipality submitted documentation to Guinness World Records in September 2021 to challenge the record held by the Cajueiro de Pirangi (RN), but official recognition is still pending.

The visit includes a ~1 km trail (about 40 minutes), environmental interpretation, and a sales area for regional products — cashews, sweets, and crafts. Admission: R$7/person. Children under 7: free. Hours: 7:30 AM–5:30 PM.

3. Praia de Cajueiro and Piscinas Naturais de Tombo

The beach at Cajueiro da Praia is long, uncrowded, and free of mass-tourism infrastructure. Good for walks, peaceful swims, and contemplation. Between July and December, the Piscinas Naturais de Tombo become accessible at low tide — natural pools formed over stone reef with crystal-clear, turquoise water, ideal for basic snorkeling. Access is on foot along the beach; check the tide schedule before heading out.

4. Kayaking and Mangrove Exploration

The estuary around Cajueiro da Praia has waterways threading through mangroves — habitat of the manatees and various bird species. Kayak or canoe tours through the mangrove can be arranged locally with community guides. The experience complements the mammal observation tour and offers another perspective on the ecosystem that makes the region unique.

5. Day Trip to Barra Grande (8 km)

Barra Grande is 8.4 km away on paved road — a natural pairing. In Barra Grande you'll find more varied restaurants, kite, windsurf, Lagoa La Boca, and more nightlife. Many visitors stay in Cajueiro da Praia (quieter and cheaper) and spend the day in Barra Grande for activities and meals.

Where to Eat

The dining options in Cajueiro da Praia are limited — the village is small and doesn't have Barra Grande's infrastructure. But what exists is honest and well-located.

Meals in the Village

There are a few simple restaurants and beach shacks serving fresh fish, seafood, and regional Piauí cuisine — rice, beans, carne de sol, caldeirada. Prices are low (R$25–50 per main course). Irregular hours outside peak season.

Local Products

At the entrance to Cajueiro Rei there's a sales area for regional products: fresh and roasted cashews, fruit preserves, and local crafts — worth stopping for and taking some for the road.

Practical tip: For more varied dining and restaurants with a proper menu, head to Barra Grande (15 min by car). The food scene there is significantly larger and includes international options.

Where to Stay

Cajueiro da Praia has few accommodation options — all simple, family-run, and geared toward ecotourism. Prices are lower than Barra Grande.

Profile	Vibe	Best For
Eco-guesthouses in the village	Simple, close to ICMBio and the beach	Those who want quiet and a focus on the manatees
Stay in Barra Grande	More infrastructure, 8 km away	Those who want to combine kite and manatees

Most village guesthouses have rooms with air conditioning, basic Wi-Fi, and breakfast included. Advance booking recommended in July/August and October/November (corridor high seasons).

Prices: vary by category and season. Platforms like Booking.com have verified listings for the region.

Plan your trip to Cajueiro da Praia

Tides, routes, vendors — everything you need to plan.

2 places mapped

2 access routes

Real-time tides

Insider tips

Know someone planning this trip? Send it their way.

Practicalities

ATM: None in Cajueiro da Praia. Withdraw cash in Parnaíba, Luís Correia, or Barra Grande before arriving.
Cards: Accepted at larger guesthouses; not always accepted at restaurants and local shacks. Have cash on hand.
Cell signal: Moderate — 4G available from TIM, Oi, and Vivo in most of the village. May fail at points further from the center and in the estuary during the tour.
Wi-Fi: Only at guesthouses. No public Wi-Fi.
Access: Paved road via BR-343 + PI-116. No 4x4 or ferry required.
Manatee tour: Book in advance — limited groups, minimum 2 people. Website peixeboi.org.br. Departure time depends on the tide and is confirmed the day before.
Cajueiro Rei: Admission R$7/person, children under 7 free. Hours 7:30 AM–5:30 PM. Bring sunscreen — much of the trail is exposed.
ICMBio Museum (CMA): Admission R$10/person. Good option before or after the canoe tour.
Recommended strategy: Stay in Cajueiro da Praia (cheaper and quieter), do the manatee tour in the morning, and spend the afternoon in Barra Grande. Or stay in Barra Grande and come early in the morning for the tour.

Summary

Item	Detail
What it is	Ecotourism village with a manatee sanctuary and the Cajueiro Rei
When to go	Year-round for manatees; Jul–Dec for natural pools
How to get there	Parnaíba (PHB) ~68 km (~1h by car via BR-343/PI-116)
Highlight	Only open-ocean manatee monitoring program on the planet
ATM	No — bring cash
Signal	Moderate (4G TIM/Oi/Vivo in most of the village)
Distance from Barra Grande	8 km (~15 min by car)

Frequently Asked Questions

Does the manatee tour run year-round?

Yes. The Marine Manatee Sanctuary operates with daily departures throughout the year. The time varies based on the tide — generally early morning, when the animals are most active at the surface. Book in advance, as groups are small (minimum 2 people). The sailing canoe tour costs R$100/person; the ICMBio museum is R$10 separately.

Is there an ATM in Cajueiro da Praia?

No. There is no bank or ATM in the municipality. Bring cash from Parnaíba, Luís Correia, or Barra Grande before arriving. Cards are accepted at larger guesthouses, but not always at restaurants and shacks.

Is Cajueiro da Praia worth visiting even without doing the manatee tour?

Yes — the Cajueiro Rei alone justifies the visit for anyone interested in nature and botanical curiosities. The beach is beautiful, peaceful, and uncrowded. And the pairing with Barra Grande (8 km) makes the detour easy to fit into any Delta itinerary.

What's the difference between the Cajueiro Rei in Cajueiro da Praia and the Cajueiro de Pirangi (RN)?

They are two completely distinct organisms, about ~1,000 km apart. The Cajueiro de Pirangi (RN) has held the Guinness record since 1994 with approximately 8,500 m². The Cajueiro Rei in Cajueiro da Praia (PI) is ~200 years old, with a canopy measured at 8,832 m² by official UESPI research using GPS, confirmed as a single organism by DNA sequencing. The municipality submitted its Guinness candidacy in 2021; formal recognition has not yet been published.

Cajueiro da Praia or Barra Grande: where should I stay?

It depends on your priority. Cajueiro da Praia is quieter, cheaper, and makes sense if the manatee tour is your focus. Barra Grande has more restaurants, kite, and nightlife. The two are 8 km apart — many travelers split their stay or base themselves in Barra Grande and visit Cajueiro da Praia for a morning.