Mesmerizing Ile aux Cerf: Speed Boat, GRSE, Lunch & Undersea walk (Full Day)

The best part of this Mauritius day trip is the mix of speedboat thrills and slow beach time. You race across the east coast lagoon, walk among reef fish with a helmet over your head, then settle down to grilled food and drinks on Islet Margenie.

I like the included hotel pickup and the small maximum group of 12. I also like that the day gives you more than a beach stop, with the undersea walk and Grand River South East Waterfalls added to the schedule. The main thing to consider is the changing pace: the morning can feel busy as people move between boats and activities, and Ile aux Cerfs itself has paid extras such as sunbeds, umbrellas, and water sports.

Key points at a glance

• The undersea walk is the signature activity: Spend about 15 minutes walking on the lagoon floor among fish and coral.
• A speedboat links the day together: Travel from Trou d’Eau Douce across clear east coast water, with fast turns on the return.
• Lunch comes with unlimited drinks: Expect grilled chicken, fish, salad, soft drinks, water, beer, wine, and local rum.
• The waterfall stop adds a change of scenery: Cruise toward Grand River South East, where monkeys and fruit bats may be visible.
• The group is capped at 12 people: That usually allows more direct help than a large boat excursion.
• Bring a towel and spare clothes: You will be wet after the boat rides, swimming, and undersea walk.

Starting in Trou d’Eau Douce at 8:30 am

Your day begins with pickup from your hotel anywhere on Mauritius. The exact pickup time can vary by location, but the stated start time is 8:30 am. You ride to Trou d’Eau Douce, a fishing village on the east coast, where the boat portion begins.

This short transfer matters because it keeps the morning simple. You do not need to arrange a separate taxi to the marina, and the return transfer is also included. If you are staying far from the east coast, remember that the pickup and return drive form part of a long day, not just a quick ride to the water.

At Trou d’Eau Douce, the change from road transport to boat may feel less orderly than the rest of the day. Different boats can be handling different activities, so you may wait briefly while groups sort themselves out. Pack light, keep your phone and valuables protected from spray, and listen closely when the guide gives boarding instructions.

Racing across the east coast lagoon

The speedboat ride to Ile aux Cerfs is one of the most enjoyable parts of the outing. The route crosses clear lagoon water, with palms, white beaches, and bright blue-green shallows appearing as you approach the island.

You get both scenery and speed here. The boat can make the crossing feel lively, while the open views give you a good first look at the east coast. On the return from Grand River South East, the driver may add fast runs and sharp spins. That is fun if you like an active ride, but it can be uncomfortable if you prefer a calm cruise.

I would keep a hat, sunglasses, and sunscreen secure. A loose hat can easily become a gift to the lagoon. A waterproof pouch is useful, since the spray and wet boat seats are part of the experience.

Finding your place on Ile aux Cerfs

Ile aux Cerfs is the postcard section of the day: white sand, palm trees, and warm lagoon water. You have time to swim, sunbathe, and look around rather than simply stepping off the boat for a hurried photograph.

The island is also where expectations matter. Some parts can feel busy and commercial, and basic comforts such as sunbeds and umbrellas may cost extra. If you only want sand and swimming, you can keep your spending down by bringing your own towel and using the free beach areas. If you want a lounger or shade, budget for possible additional charges.

The island offers other paid activities, including parasailing and glass-bottom boat trips. These are not part of the listed package, so do not assume the $139.37 price covers them. The included program already fills most of the day, but Ile aux Cerfs can tempt you to add more once you arrive.

Snorkeling conditions are another point to keep clear. The excursion includes time for swimming and mentions snorkeling in the lagoon, but access to some snorkeling options may require payment. Ask the guide what is included before you agree to an extra activity.

Walking under the lagoon surface

The undersea walk is the most unusual part of this excursion. You wear an underwater helmet and walk across the reef area while fish move around you. The session lasts about 15 minutes, though the full stop, including instructions and changing, takes longer.

You do not need to be a strong swimmer to appreciate the idea, but you should be comfortable entering the water and following the guide’s directions. The point is not speed. You move slowly, look around, and watch the fish and coral close to the reef.

This activity received the strongest praise in the available feedback, but it also needs realistic expectations. The walk itself is short, and one guide may need to assist several people at once. If someone in the group becomes nervous, the pace can pause while the guide helps them. That can make the activity feel less personal than a private session.

Children are not automatically included in the undersea walk. The activity depends on parental decisions, and children pay only for their speedboat seat according to the tour conditions. If you are booking for a family, clarify the child arrangement before paying.

Bring spare clothes. You may be wet from the boat, swimming, and the undersea walk, and changing facilities can make dry clothing especially welcome.

Barbecue lunch on Islet Margenie

Around noon, the group heads to Islet Margenie for a freshly prepared barbecue lunch. The meal includes grilled chicken, fish, salad, and other food, with vegetarian options available if you request one in advance.

The setting is part of the appeal. You eat beside the sea rather than in a formal restaurant, and the lunch stop gives you a chance to sit down after the morning activities. You are not expected to rush through the meal and leave at once. There is time to eat, have a drink, and swim afterward.

The drinks package is generous for a full-day boat trip. It includes soft drinks, water, beer, wine, and local rum. That can make the tour a good value for adults who would otherwise buy lunch and drinks separately. It also means you should pace yourself, especially under the midday sun and after a fast boat ride.

If you have a food allergy or an illness that could affect the activities, tell the operator before the day begins. Vegetarian food is available, but it must be requested in advance rather than assumed on arrival.

Cruising to Grand River South East Waterfalls

The final major stop is Grand River South East Waterfalls, usually called GRSE. The river is the longest in Mauritius, and its mouth can be reached by boat. The scenery shifts from open lagoon and beach to riverbanks lined with older trees.

You may see monkeys moving through the branches and Mauritian fruit bats resting high in the trees. These sightings are not guaranteed, but keeping your eyes on the riverbanks makes the boat ride more rewarding. This is a passing visit rather than a long waterfall hike, so think of it as a scenic cruise and wildlife look rather than a full nature walk.

The waterfall itself is attractive from the water, but the stop may feel brief. The boat often keeps moving toward the falls and then turns back rather than giving you a long period on land. If your main goal is a quiet waterfall visit, this excursion may not offer enough time. If you want to add a river setting to a beach day, it works well.

The ride back brings another burst of speed. The combination of the river, waterfall, possible wildlife, and fast return makes the afternoon feel different from the morning instead of repeating the same beach routine.

What the $139.37 price really covers

At $139.37 per person, this is not the cheapest way to see Ile aux Cerfs. The value comes from the number of separate costs bundled together: hotel pickup and return, speedboat transport, the undersea walk, a barbecue lunch, alcoholic and non-alcoholic drinks, and the GRSE boat stop.

For an adult who wants the full package, the price can make sense. Buying a boat transfer, lunch, drinks, and an undersea activity separately could quickly narrow the gap. The small group limit of 12 is another useful part of the value, since you are not being placed in a huge excursion crowd.

The calculation changes if you plan to spend all day on the beach and skip the undersea walk. Ile aux Cerfs can be visited in other ways, and the paid island extras are not covered here. You are paying for a full schedule, not just access to sand and water.

Children pay only for their speedboat seat, but the undersea walk is not automatically part of the children’s package. Ask for the exact child price and activity terms before booking, since the advertised adult price should not be used as a guide for every age group.

The experience has a 7 to 8 hour duration, so you get a full day rather than a short morning outing. That length is useful if you want several highlights in one booking, but it can feel tiring in hot weather. Drink water even though other drinks are included, and take shade when you can.

Who will enjoy this day most

I would choose this trip if you want a broad taste of Mauritius in one outing. It suits you if you like boats, swimming, simple beach time, a short activity with marine life, and a scenic river stop. The included lunch and drinks also help if you prefer not to plan each part of the day yourself.

It is a good fit for couples and small groups who want a lively day with plenty of movement. The undersea walk is especially appealing if you want to see reef fish without booking a full scuba experience.

Families should check the child rules carefully. The boat ride may work well for children, but the undersea walk depends on the parents and is not included for children in the same way. Anyone with mobility, medical, or water-related concerns should ask the operator for clarification before booking, since most people can participate but the day involves boats, wet surfaces, and water activities.

This is less suitable if you want silence, a private guide, or a long, unhurried visit to one place. The schedule moves from vehicle to speedboat, then between island activity points, lunch, and the waterfall. That variety is the reason to book it, but it can also create a little organized confusion.

Practical tips for a smoother day

• Bring a towel and one full change of clothes.
• Wear secure shoes or sandals that can handle a boat and wet ground.
• Protect phones, cameras, and wallets from spray.
• Request vegetarian food before the tour date.
• Report food allergies or illness in advance.
• Keep some money available for island extras such as sunbeds, umbrellas, and optional activities.
• Bring sun protection and drink water throughout the day.
• Expect the pickup time to vary by hotel location.
• Check weather conditions before departure, since the trip depends on good weather.

The operator requires at least two people per booking, and the group maximum is 12. Confirmation is provided at booking, and the meeting time is listed as 8:30 am. Free cancellation is available up to 24 hours before the start time. Within 24 hours, changes and refunds are not accepted, except when the operator cancels because of poor weather or a cyclone or torrential rainfall alert.

Should you book the Ile aux Cerfs speedboat tour?

Book it if you want one organized day with several Mauritius highlights: a fast lagoon crossing, a short undersea walk, beach time, barbecue lunch with drinks, and a GRSE waterfall cruise. At $139.37, the package is easiest to justify when you plan to use the included activity and drinks rather than treating it as a simple beach transfer.

Skip it if your priority is a quiet, uncrowded island day or a long snorkeling session. You should also look elsewhere if you dislike fast boat rides, paid beach facilities, or a schedule that can feel busy at the start.

For most people, the best reason to choose this excursion is its range. You get a little of the east coast’s sea, sand, reef, food, and river scenery in one day. Just arrive prepared for wet clothes, possible extra charges on Ile aux Cerfs, and a short rather than extended undersea walk.

FAQ

Where does the tour start?

The excursion begins with hotel pickup anywhere on Mauritius, followed by a transfer to Trou d’Eau Douce on the east coast. The listed start time is 8:30 am, though pickup time may vary by location.

How long does the experience last?

The full excursion lasts approximately 7 to 8 hours.

Is hotel pickup included?

Yes. Complimentary pickup and return transfers from your Mauritius hotel are included.

What food and drinks are included?

Lunch includes grilled chicken, fish, salad, and other barbecue items. Drinks include soft drinks, water, beer, wine, and local rum. A vegetarian option is available if requested in advance.

Is the undersea walk included for children?

The undersea walk is not automatically included for children. Participation depends on the parents, while children pay only for their speedboat seat according to the tour conditions.

How many people are in the group?

The activity has a maximum of 12 participants. A minimum of two people is required per booking.

What happens if bad weather cancels the tour?

The experience requires good weather. If the operator cancels because of poor weather, a different date or a full refund is offered. You can also cancel for a full refund up to 24 hours before the start time.