Every travel forum thread about Mauritius catamaran cruises follows the same pattern. Someone asks whether to do Île aux Cerfs, the northern islands or the west coast. Four people each recommend the one they did. Nobody mentions that the right answer changes depending on where the asker is staying and which month they are coming.
It is not a matter of taste. Mauritius has a prevailing wind, a mountain range, and a reef that runs closer to shore on some coasts than others, and those three things decide which boat trip is flat and which is a two-hour slog. This article sets out what each coast actually gives you, who it suits, and — the part the listings never explain — why.
If you have not yet worked out what these cruises involve at all, our complete guide to catamaran cruises in Mauritius covers the formats, the timings and what a day on board looks like. This article assumes you are past that and choosing a route.
The geography that decides everything
Mauritius sits in the belt of the south-east trade winds. They blow more or less constantly from the south-east, and they are strongest during the cool season, June to September.
That single fact produces the pattern you need:
- The south-east coast takes the wind head-on. It is also the wettest part of the island — around 1,600mm of rain a year, against roughly 1,200mm on the north-west.
- The north-west sits behind the island’s central mountains and is sheltered from the trade winds. This is why the resort strip is concentrated there and why it is the recommended side for beach days in winter.
- The east coast around Île aux Cerfs is exposed to the wind but protected by an unusually wide lagoon, so the boats sail on flat water even when it is blowing.
- The west coast around Black River and Tamarin is in the lee of the island for most of the year and is the calmest open water available.
That gives you the two axes that actually matter: how sheltered the water is, and whether you are inside the lagoon or out in it.
East coast: Ile aux Cerfs
The trip. A full day, roughly seven hours, out of Trou d’Eau Douce or Pointe Jérôme. You sail across the lagoon, stop to snorkel, most itineraries include the Grand River South East waterfall, lunch is barbecued on board, and you get two to three hours on Ile aux Cerfs itself.
Why the water is flat. The lagoon on this coast is wide, and the reef sits well offshore, so the swell breaks a long way out. Even in August, when the trade winds are up, an east-coast cruise stays inside that protected water almost the whole day. This is the single most reliable route for anyone worried about the sea.
What it is genuinely famous for. Ile aux Cerfs has the best-known sand in Mauritius and it deserves the reputation — a long, shallow, absurdly pale beach on the eastern side.
The honest downside. It is the busiest boat route on the island. The section of Ile aux Cerfs where the tour boats land is developed and commercial: vendors, parasailing touts, queues for the speedboat to the waterfall. Photographs of the island are taken on the far side, a fifteen-minute walk away, and that walk is the difference between loving the island and wondering what the fuss was. Do the walk.
Who it suits. First-time visitors. Families. Anyone who wants the full seven-hour day with a proper lunch. Anyone nervous about motion sickness. Anyone staying between Belle Mare, Trou d’Eau Douce and Palmar.
Who should skip it. Serious snorkellers — the northern islands are better. Anyone who reacts badly to crowds.
Our Ile aux Cerfs Catamaran Cruise is €55 per person for seven hours, leaving from Trou d’Eau Douce, with the waterfall stop, snorkelling, a barbecue lunch on board, and drinks included.
North coast: Coin de Mire, Gabriel and Flat Island
The trip. Out of Grand Baie or Cap Malheureux to the three uninhabited islands off the northern tip — Coin de Mire (the big wedge-shaped rock you can see from the shore), Ilot Gabriel and Flat Island. Snorkelling at two or three spots, lunch, and time on a beach with nothing built on it.
Why the snorkelling is better. These islands sit outside the main lagoon in deeper, clearer water, and because nobody lives on them, there is no runoff. Visibility and fish life are a clear step up from the east-coast lagoon stops.
Why the crossing is different. You are in open water, not a lagoon. On a calm day, this is the best sailing of the three coasts: actual sailing, engines off, the boat heeling slightly. Between June and September, when the trade winds are strongest, the outbound leg can be lively. Catamarans handle it far better than single-hulled boats, but this is the route where a swell is possible, and the one to think twice about if you know you are a bad sailor.
Who it suits. Snorkellers. Anyone staying in the north — Grand Baie, Pereybère, Cap Malheureux, Trou aux Biches. Travellers who want an island without a beach bar on it. Confident sailors who want the boat to actually sail.
Who should skip it. Anyone prone to seasickness travelling in July or August. Families with very young children, on the crossing rather than the islands.
Two options from us on this coast. The Northern Islands Tour to Coin de Mire, Gabriel and Flat Island is €65 for a half day with snorkelling at all three islands, a beachside barbecue and an open bar, and it is worth saying plainly that this one runs on a speedboat, not a catamaran. It is faster and gets you more time in the water; it is also a bumpier ride in wind. If you want a catamaran on this coast, the short option is the Sunset Catamaran Cruise from Grand Baie at €38 for adults and €19 for children, two hours in the late afternoon when the wind has usually dropped.
West coast: Black River, Tamarin and Le Morne
The trip. Out of Black River, usually early. Dolphins in Tamarin Bay first thing, then snorkelling over the reef, often a stop near Île aux Bénitiers with Le Morne’s cliff standing behind you. Between roughly July and October, humpback whales pass through the same water.
Why the water is calm. This coast is in the island’s wind shadow for most of the year, which is precisely why the dolphins rest here: spinner dolphins feed offshore at night and come into this sheltered water in the morning. Calm water and dolphins are the same phenomenon, not a coincidence.
Why you go early. Partly the dolphins, partly the law. Under the Tourism Authority (Dolphin and Whale Watching) Regulations 2012, dolphin and whale watching is permitted only between 06:00 and noon, and swimming with dolphins only between 06:00 and 09:00. Any operator offering you a mid-morning dolphin swim is offering you something they are not allowed to do. We cover what else those regulations require, and how to use them to pick an operator, in our guide to swimming with dolphins in Mauritius ethically.
The honest downside. Dolphins are wild animals and are not guaranteed. Tamarin Bay in high season can have an uncomfortable number of boats in it at 07:00. And most west-coast dolphin trips run on speedboats rather than catamarans, because a speedboat can reposition quickly and quietly; if it is specifically a catamaran you want on this coast, you are mostly looking at private charters and sunset sails.
Who it suits. Anyone staying at Flic en Flac, Tamarin, La Preneuse or Le Morne. Anyone for whom the dolphins are the point. Early risers. Anyone travelling in the winter months who wants the calmest possible water.
Who should skip it. Late risers. Anyone who will be disappointed by a morning with no dolphins. Anyone expecting a long lazy day — the short trips are two hours and over by 09:00.
Our west-coast options run from a two-hour dolphin and whale excursion at €50 out of Black River, through a five-to-six-hour dolphin and whale watching day at €100 that adds reef snorkelling, to the Private Sunset Cruise with Lobster Dinner at €365 for up to four people, which is the west coast’s catamaran answer.
The best catamaran cruise in Mauritius, coast by coast
| East (Ile aux Cerfs) | North (three islands) | West (Black River) | |
|---|---|---|---|
| Typical length | 7 hours | Half to full day | 2–6 hours |
| Water | Wide lagoon, flat | Open water crossing | Sheltered, usually calm |
| Best for | First visits, families | Snorkelling | Dolphins, whales in season |
| Sea conditions Jun–Sep | Reliably flat | Can be lively | Calmest on the island |
| Crowds | Highest | Moderate | Busy at dawn in high season |
| Usual vessel | Catamaran | Speedboat or catamaran | Speedboat; catamaran for charters |
| Wildlife | Lagoon fish | Best reef fish | Spinner dolphins, humpbacks Jul–Oct |
| Stay nearby | Belle Mare, Trou d’Eau Douce | Grand Baie, Pereybère | Flic en Flac, Tamarin, Le Morne |
How to choose in two questions
Where are you staying? This should carry more weight than any review. Mauritius looks small and drives large; Belle Mare to Black River is a long, expensive taxi before a 06:30 boarding time. Pick the coast you are on unless you have a specific reason not to.
What is the one thing you want from the day? If it is a famous beach and a long lunch, go east. If it is fish and clear water, go north. If it is dolphins, go west and go early. Trying to get all three in one trip is how people end up on a day that does none of them well.
A third question, for winter travellers only: if you are coming between June and September and you know you are prone to seasickness, that pushes you east (inside the lagoon) or west (in the wind shadow), and away from the northern open-water crossing. The reasoning, month by month, is in our guide to seasickness and winter winds on a Mauritius catamaran cruise.
Frequently asked questions
Which coast has the best catamaran cruise in Mauritius?
There is no single best. The east coast gives the most complete full-day experience on the flattest water, the north gives the best snorkelling, and the west gives the calmest conditions and the dolphins. Choose by where you are staying and what you most want to see rather than by ranking.
Is Ile aux Cerfs worth it or is it too crowded?
It is worth it if you walk away from the landing point. The area where the tour boats arrive is developed and busy; a fifteen-minute walk along the eastern shore gets you to the beach the photographs are taken on. Visitors who stay near the jetty are the ones who come back disappointed.
Which coast is best for snorkelling in Mauritius?
The northern islands — Coin de Mire, Ilot Gabriel and Flat Island. They sit in deeper, clearer water outside the main lagoon and are uninhabited, so there is no runoff. Visibility and fish life are noticeably better than the lagoon stops on the east coast.
Which coast is calmest for a boat trip?
The west coast around Black River and Tamarin for most of the year, because it sits in the island’s wind shadow. The east coast lagoon is also very flat despite being exposed, because the reef is far offshore. The northern open-water crossing is the least sheltered, particularly from June to September.
Can you see dolphins on the east or north coast?
Wild spinner dolphins are reliably found off the west coast, particularly Tamarin Bay, because the sheltered water is where they rest in the morning. Sightings elsewhere happen but are not something to plan a booking around. If dolphins matter to you, go west.
Should I pick the coast I am staying on?
In most cases yes. Transfers in Mauritius take longer than the map suggests and are rarely included in the cruise price, so a cheaper cruise on the far coast often costs more once you add the taxi — and a 06:00 dolphin departure from the opposite side of the island means leaving your hotel in the dark.
Which coast is best in August?
The west, for calm water, or the east if you want a full day inside the lagoon. August is the height of the south-east trade winds, so the north-coast open-water crossing is the one most likely to be uncomfortable, and the south-east is the wettest and windiest part of the island.
In one paragraph
Staying on the east? Book the full-day Île aux Cerfs cruise, and walk to the far beach. Staying in the north? Book the three northern islands if you care about snorkelling, or the Grand Baie sunset sail if you want two easy hours. Staying in the west? Go out of Black River before 07:00 and give yourself the best chance of seeing dolphins. Then check the month before you pay, because in July and August the coast you choose matters more than the operator you choose.