Trou d’Eau Douce: 5 Island Adventure with BBQ & Snorkeling

Mauritius’s southeast coast packs a lot into six hours: a fast speedboat ride, historic islands, a waterfall, snorkeling, wildlife spotting and a beach BBQ. The best moments come when the boat leaves the calm lagoon and reaches the rougher ocean side, where waves crash against the old lighthouse islands.

I like the mix of history and sea time, especially the chance to see Ile aux Fouquets and Ile de la Passe before swimming near Ile aux Aigrettes. I also like the small group size, limited to 14 people, which makes the boat feel more personal. The drawback is pace: the first island stops are brief and rocky, and the waterfall itself may feel less impressive than the scenery and monkeys around it.

Key points at a glance

• Fast speedboat, not a catamaran: Expect an energetic ride across the southeast coast, with wind, spray and sharp turns.
• A compact history lesson: Ile aux Fouquets and Ile de la Passe connect to the 1810 naval battle of Grand Port.
• Wildlife is possible, not promised: Dolphins, turtles, monkeys, flying foxes and other marine life have all been spotted.
• Snorkeling and swimming are central: You get about 40 minutes for water activities, plus another swim stop at Ile aux Aigrettes.
• Beach BBQ on Ile aux Cerfs: Lunch, drinks, beer and local rum are included, with vegetarian food available.
• Bring water shoes: Some early stops are made up of stones, and the rocky footing can be awkward barefoot.

What this six-hour Mauritius boat trip is really like

This is a sightseeing-heavy day with a strong thrill-ride element. You meet at the jetty beside the Mauritius flag, next to the Blue Alizé Catamaran Ile aux Cerfs departure point, then board a speedboat for a loop around the southeast coast.

The boat can move very quickly. That is a major part of the fun, but it matters when deciding if this tour suits you. You will feel the wind and spray, and the ride can be lively when the sea is rough. The group limit of 14 keeps the outing smaller than a large party cruise, though you should still expect a shared boat rather than a private charter.

The crew has included guides called Oliver, Rajiv, Rajesh, Wendel, Jeremy, Ranjeev, Tony, Christophe and Rhaiv. Their approach varies by person, but the strongest guides add jokes, explain the islands in French and English, help with photos and keep an eye on swimmers. Commentary can be lighter during some stretches, so this works better for you if you want a friendly guide and plenty of scenery rather than a formal history tour.

Ile aux Cerfs and the first look at the coast

Ile aux Cerfs is both the starting point and the main beach stop later in the day. Early on, you get roughly 40 minutes to walk, look around and take in the pale sand and clear water.

The island is attractive, but do not expect the first stop to be a long, empty-beach escape. It is a popular part of Mauritius, and the schedule gives you a quick introduction rather than hours of quiet. If you want a swim right away, you may need to make that choice quickly.

The island becomes more useful later, when lunch is served and you have two hours to relax. That longer block gives you time to eat, swim, sunbathe and enjoy the beach without watching the clock every few minutes.

Grand River South East Waterfall and the monkeys

The boat then heads toward the Grand River South East waterfall, often called the GRSE waterfall. You spend about 20 minutes here, mainly for a photo stop and a look at the cascade from the water.

The waterfall itself is not enormous, so keep your expectations sensible. Its setting is the real attraction. The route can bring you close to monkeys, and guides have sometimes helped passengers spot them near the falls. You might also see flying foxes in the area.

There is one point worth handling carefully. Some boat operators feed monkeys or birds to bring them closer for photos. That can make for an exciting sight, but feeding wild animals is not good practice. Enjoy the view, keep your hands and snacks to yourself unless your guide gives clear instructions, and avoid treating wildlife as a photo prop.

Snorkeling near Grand Port

The water stop near the Grand Port district lasts about 40 minutes. This is where you can use the supplied mask and snorkel and look for fish and other marine life.

The water is often clear enough for a pleasant swim, and turtles have been seen during snorkeling and from the boat. Dolphins and turtles are wild animals, so sightings are never guaranteed. If you do meet one, give it room and follow the guide’s lead rather than trying to chase it.

The supplied equipment covers the basics, but its quality can vary. If you care a lot about fit or hygiene, bring your own mask and snorkel. Water shoes are also useful, especially if the entry area is stony. Pack a towel, sunscreen, a hat and sunglasses, and leave large bags behind because they are not allowed on the boat.

Fouquets Island and the old lighthouse

Fouquets Island, also called Ile aux Fouquets, is one of the most interesting stops for anyone who likes a little history with their beach day. The old lighthouse is more than 200 years old and is now a protected historical monument.

The stop lasts about 20 minutes. You may walk briefly, take photos and look across the island’s striking split personality. One side has calm turquoise lagoon water. The other faces the Indian Ocean, where larger waves hit the outer reef and island rocks.

This contrast is more memorable than simply seeing another small island. It shows how much the reef changes the character of the sea within a short distance. The lighthouse itself is weathered and simple, not a grand building, but its isolated position makes it worth seeing.

Ile de la Passe and the 1810 naval battle

The boat passes Ile de la Passe, another small island linked to the colonial period of Mauritian history. In 1810, Ile de la Passe and Ile aux Fouquets were part of the naval battle of Grand Port between French and British forces.

The French victory is especially notable because it was the only naval victory of Napoleon’s navy, and it is recorded on the Arc de Triomphe in Paris. You will not get a long museum-style presentation here, but the guide can give the stop context as you pass.

This is one reason I prefer this trip to a simple beach transfer. You are not only moving between swimming spots. You are also seeing locations tied to the struggle for control of Mauritius. Still, the historical explanation may be short, so bring your own interest in the subject rather than expecting a full guided lecture.

Searching for dolphins around Fouquets Island

Dolphin watching is part of the route, usually around Fouquets Island and nearby waters. The crew may slow down or adjust the route if dolphins are spotted.

You may also see turtles, barracuda or other marine life. Several guides have been praised for finding animals and giving people time to watch them, but nature does not work on a timetable. A dolphin sighting should be treated as a bonus, not the main reason to pay for the trip.

The best approach is to keep your camera ready, then put it away for a moment when something appears. Fast boat rides, moving animals and bright sun are not ideal for perfect photographs. Your guide may also help take pictures of you at the stops.

Ile aux Aigrettes swimming and aperitif stop

The Ile aux Aigrettes stop lasts about 45 minutes and combines swimming with an aperitif. It breaks up the sightseeing nicely, giving you a chance to get into the water before lunch.

The water is described as clear, and this is another good place to cool off. Drinks and snacks are provided during the day, with local rum and rum-based drinks available on board. Alcohol can make the trip more festive, but you should still pace yourself. You are on a moving boat, in strong sun and around open water.

If you are not a confident swimmer, tell the crew before entering the water. The supplied information does not describe a dedicated accessibility service, so you should ask the operator about your needs before booking.

Two hours for BBQ lunch on Ile aux Cerfs

The long lunch stop is the practical heart of the day. Back on Ile aux Cerfs, you get about two hours for a BBQ meal, drinks and free time on the beach.

The meal includes BBQ food, snacks and drinks, and vegetarian options have been provided. Beer and local rum are included, while a lobster may be available for an additional charge. If that interests you, ask about the extra cost before ordering.

I like that lunch is not squeezed into a quick sandwich stop. Two hours gives you time to eat slowly, swim, dry off and enjoy the beach. The food is part of the value here, especially because the tour combines transport, several stops, snorkeling gear and lunch for about $100 per person.

That price is not the lowest way to reach Ile aux Cerfs, but it covers far more than a simple island visit. You are paying for the speedboat, crew, fuel, water stops, sightseeing, equipment and BBQ. The value is strongest if you want to see many sides of the southeast coast in one day. If you only want a quiet beach afternoon, a simpler excursion may suit you better.

How much time do you really get at each stop?

The schedule is ambitious. You get 40 minutes at the first Ile aux Cerfs visit, 20 minutes at the waterfall, 40 minutes for snorkeling, 20 minutes at the lighthouse, 45 minutes at Ile aux Aigrettes and two hours for lunch and beach time.

That means the trip gives you variety rather than long, thoughtful visits. You will see many places, but you will not have time to explore each island in detail. I see this as a fair trade for a six-hour tour. Extending every stop would turn the day into an eight-hour outing or longer, and the fast movement between sites is part of what makes the route possible.

The boat ride itself also counts as sightseeing. The changing water, offshore islands and breakers are not filler between stops. They are some of the best parts of the day.

What to bring and who should book

Pack light. Large bags and luggage are not allowed, so use a small soft day bag if permitted by the operator. Bring:

• Swimsuit and towel
• Sunscreen and sunglasses
• Sun hat
• Water shoes
• Your own snorkeling gear if you prefer a personal fit
• Waterproof protection for your phone

This outing suits couples, families with older children, solo visitors and anyone who wants a busy day on the water. One family with an eight-year-old found the mix manageable, but the speedboat ride may not appeal to every child.

It is not suitable for pregnant women. You should also think twice if you dislike fast boats, strong sun, short stops or shared wildlife viewing. The trip is much less suited to someone who wants a slow, quiet cruise.

French and English are offered. The guide may provide history, jokes, wildlife spotting and photo help, but the amount of commentary depends on who leads your boat. Free cancellation is available up to 24 hours before departure, and you can reserve now and pay later.

Should you book this southeast Mauritius tour?

I would book this if you want one energetic day that covers the southeast coast in depth and variety. The strongest parts are the speedboat ride, the lighthouse islands, the chance to snorkel, the wildlife sightings and the two-hour BBQ stop on Ile aux Cerfs.

I would skip it if your main goal is a peaceful beach day or a slow historical tour. You will move quickly, the early island stops are short, and the waterfall may not impress you on its own.

For most active visitors, $100 is fair value. Bring water shoes, consider your own snorkeling equipment, keep wildlife encounters respectful and prepare for a fast, sunny day rather than a calm cruise.

FAQ

Where does the tour start?

Meet at the jetty next to the flag of Mauritius, at the Blue Alizé Catamaran Ile aux Cerfs departure point in Trou d’Eau Douce.

How long does the experience last?

The tour lasts six hours. Starting times vary, so you need to check availability for the date you want.

Is this trip on a speedboat or a catamaran?

It is a speedboat trip. The boat moves quickly and can be exciting for people who enjoy a fast ride.

Which languages are available?

Guiding is available in English and French.

How many people are in the group?

The group is limited to 14 participants.

Is lunch included?

Yes. A BBQ lunch is served on Ile aux Cerfs, along with drinks. Vegetarian food is available.

Is snorkeling equipment provided?

Yes. Snorkeling gear is included, though you may prefer to bring your own for fit or hygiene reasons.

Can I see dolphins and turtles?

You might see dolphins and sea turtles, but wildlife sightings are not guaranteed.

What should I bring?

Bring sunglasses, a sun hat, sunscreen and a towel. Water shoes and personal snorkeling equipment may also be useful.

Can pregnant women join the tour?

No. The activity is not suitable for pregnant women.