204See a shipwreck at 35 meters without getting wet. A real passenger submarine off Trou-aux-Biches takes you past coral reefs, surgeonfish and sea turtles to the Star Hope wreck, all from a dry, air-conditioned cabin. Book the dive and keep your feet dry.
Real submarine dives in Mauritius share one departure point: a passenger submarine off Trou-aux-Biches that descends 35 meters to the Star Hope wreck. What separates the three options is how much they wrap around that dive, from a bare excursion ticket to a day with hotel transfers from anywhere on the island. Everyone stays dry.
Answer a few quick questions and see which dive fits your day.
Your best matchPopular with couples and families with kids or teens. 94% of couples and 94% of families gave it 4 or 5 stars.
The straightforward ticket: 40 minutes at 35 meters to the Star Hope wreck, transfers on you.
Your best matchSuited to couples, families and ocean lovers of all ages who want hotel pickups handled.
The all-inclusive day: transfers from any hotel or villa across the island, then the wreck dive.
Your best matchSuited to families, couples and travelers of any age who want pickup included.
Same 35-meter dive with hotel pickup, shuttle boat and refreshments folded in.
Three ways to sit dry inside a real submarine at 35 meters, watching the Star Hope wreck roll past your porthole.
The 2-hour dive from Trou-aux-Biches covers 40 minutes underwater, the wreck, a 17th-century anchor and a dive certificate.
Hotel pickup and drop-off come included, so no taxi maths before the 2-hour dive with shuttle boat, briefing and certificate.
A private transfer from any hotel or villa on the island is folded into the same 35-meter dive with certificate and refreshments.
The draw is the wreck. Forty minutes underwater at 35 meters, dry the whole time, watching surgeonfish and parrotfish swim past your window before the submarine glides to the Star Hope, sitting upright on the sand with a 17th-century sheet anchor nearby.
At that depth, reds and yellows disappear from the light, so the wreck reads in blues and greens. The fish gather there anyway: the sunken ship became an artificial reef, and moray eels and sea turtles are regulars. You leave with a dive certificate and an iced tea.
Book your dive for the first day or two of your stay. If a rough sea forces a cancellation, you get a full refund and can rebook on a calmer day later in the week.
Compare two formats: the Trou-aux-Biches tour as a standalone ticket, or a package that adds hotel pickup from anywhere on the island. Staying on the east or south coast, the transfer option saves you a drive of one to one and a half hours.
After payment you receive a voucher by email with the meeting details. The check-in desk sits on Coastal Road in Trou-aux-Biches, at the same site as the restaurant Le Pescatore, so put that name in your maps app.
If your tour has no pickup, allow about an hour from eastern resorts and roughly an hour and a half from Bel Ombre or Le Morne. Buses mean changing terminals in Port Louis, so a taxi or rental car is the reliable way to make your slot.
Reach the desk before your slot, check in with the staff, and join the welcome and safety briefing. A shuttle boat then takes you on a ten-minute ride out to the offshore submarine platform, where you climb down the ladder into the cabin.
Amazing trip!! My kids were thrilled and so proud they drove a submarine.
Went with our 2-year-old and got a welcome drink. After the briefing we took the boat to the submarine. Very exciting for the little one. Great weather, saw lots underwater.
My guide was friendly and competent. The dive was pleasant, and they turned the sub several times so both sides could see the same things. A lovely experience.
A unique experience with a great team. We had an unforgettable moment and recommend it!
Greeted with iced tea and a briefing, then a picturesque boat ride to the sub.
A childhood dream fulfilled, feeling like Captain Nemo! Beautiful boat ride, impressive coral reef and shipwrecks at 35 meters. The guide was knowledgeable and impressive. Nice welcome and farewell at the office.
First time actually diving in a submarine, not just a museum one. Well organized, not claustrophobic (though very tall people may struggle sitting).
Most reviewers call this dive a once in a lifetime experience, and several say the friendly crew made it run smoothly.
Many reviewers expected a tight, cramped cabin and found it airy and cool, with the pilot pointing out turtles.
A few travelers wished they had arranged their own taxi earlier, so they could reach the desk without rushing.
Some submarine excursions leave you to arrange your own way to the coast. This one adds hotel pickup and drop-off anywhere on the island, so a morning briefing and a shuttle boat to the dive platform follow straight from your hotel door.
Once you descend 35 meters in the air-conditioned cabin, you watch coral reefs, tropical fish and the Star Hope shipwreck pass the large viewing ports, all without getting wet. It suits travelers staying far from Trou-aux-Biches who would rather not hire a taxi or rent a car for the trip north.
Free cancellation up to 24 hours before departure lets you hold a seat now and adjust later.
Green marks the lowest price. Prices per person.
Hotel transfers are not included in the standard tour, so from eastern resorts count on about an hour's drive and from southern ones about an hour and a half. A private taxi, a rental car or a transfer package covers it; public buses from the south or west take well over two hours with a change in Port Louis.
You climb down a vertical ladder of roughly two meters into the hatch, so you need to move comfortably between boats and on steps. Long unslit dresses, saris and high heels get in the way on the ladder, and people with mobility impairments cannot take this tour.
The standard ticket covers the dive, shuttle transfers, a briefing, iced tea or refreshments, and a personal dive certificate. Hotel pickup, and tipping, sit outside that. One version of the tour bundles in hotel transfers from anywhere on the island, so compare the cards if you have no car.
Rain and strong easterly winds do not stop the dive, because the west coast site sits sheltered. Rough seas with heavy swell from the south or northwest are the only real cancellers, and if conditions change the dive route may be adapted. Operators suggest booking for the first days of your stay so there is room to move it.
You can cancel up to 24 hours in advance for a full refund. If the operator cancels for rough seas, you get a full refund or a rescheduled dive.
The tour is not suitable for people with heart problems, and severe claustrophobia is a reason to pick another activity. Babies under 9 months cannot come aboard. Inside the cabin the pressure stays at normal surface level, so there is no ear discomfort at depth.
The shuttle boat ride can be choppy, and that is where queasiness happens. Once the submarine submerges, the water it moves through is far calmer than the surface, and people prone to motion sickness usually feel fine from there on.
Check-in happens at the welcome desk on Coastal Road in Trou-aux-Biches, at the same site as a well-known seafood restaurant. Staff greet you there with a welcome drink and a short briefing before anything else happens.
The whole excursion takes about two hours from arrival to return. A 15-minute briefing on shore leads into a short shuttle boat ride to the offshore platform, then the 40-minute dive at 35 meters, then the boat back.
You never enter the water, so non-swimmers take this dive without worry. The cabin is sealed and air-conditioned, you stay completely dry, and regular comfortable clothing is right, no swimwear needed.
Flat shoes with good grip are the one firm requirement, for the boat transfers and the ladder. Bring a camera or phone; the flash must be off because it reflects on the portholes. Alcohol before diving is not allowed.
At 35 meters the water filters out red and yellow light, so the wreck and the fish look blue-green unless the submarine's lights fall on them. Keep that in mind when you set your camera. Sea turtles, moray eels and schools of surgeonfish, kingfish and capitaine show up around the Star Hope regularly.
A real tourist submarine really does run off Trou-aux-Biches, 35 meters down to a shipwreck. The question is not whether it exists but whether it fits your day, your family and your hotel.
Book the dive for your first morning: earliest slots leave from 8:30 am, when the sea is flattest and rescheduling is easiest.
Allow a full 2 hours: 15 minutes ashore, a boat ride out, 40 minutes underwater and the ride back.
Wear flat shoes with grip; you climb down a vertical ladder of up to 2 meters into the hatch.
Ten passengers and a pilot sit in a dry, air-conditioned cabin while sand and shadow slide past the portholes at 35 meters down. This is no boat with a glass floor.
A real passenger submarine, a sealed pressure hull, does it off Trou-aux-Biches, and it is the only way to reach that depth without learning to scuba dive.
The difference matters when you compare the options. A glass-bottom boat stays on the surface and peers through a panel set into the hull.
A semi-submarine sinks its viewing cabin 1.5 meters below sea level and keeps an open deck above it. A true submarine is a pressure vessel, built for depth, and that is what carries you to the wreck.
| Real submarine | Semi-submarine | Glass-bottom boat | |
|---|---|---|---|
| Depth reached | 35 meters below the surface | cabin sits 1.5 meters down, deck stays above water | surface only |
| How you view the ocean | portholes in a fully submerged vessel | side-facing panoramic windows | glass panel in the hull |
| Getting wet | never, the cabin is dry and air-conditioned | never | never |
| Who it suits | non-swimmers, families, anyone who can climb the entry ladder | toddlers and visitors with limited mobility | anyone |
Dry is the whole point, and it works. The cabin holds normal air pressure the whole way down, so there is no ear discomfort and no decompression. Non-swimmers ride as comfortably as divers.
And because a sunken wreck attracts sea life the way many natural near-shore reefs here do not, the sub often shows you a livelier stretch of ocean than a swim would.
One honest counterpoint: you are a passenger the entire time. Travelers who want their arms and fins in the water are happier snorkeling or diving.
The Star Hope sits upright on a sandy seabed, its superstructure crusted in coral, with a 17th-century sheet anchor lying nearby. The ship was deliberately sunk to build an artificial reef, and the years have done the rest: every surface now shelters something.
Javanese moray eels live in the wreck, and sea turtles visit often. Schools of surgeonfish, kingfish, capitaine and parrotfish thread between the beams, with pelagic species dropping in from deeper water. More than 100 species of fish work this ground, from jackfish to clownfish to rays.
A note on color, because it surprises people. At 20 to 35 meters the water filters out red and yellow light, so the wreck and the fish look blue or green through the portholes. Photographs come back the same way.
The tour that reaches all of this is the Trou-aux-Biches: Submarine Tour to the Star Hope Wreck, a 2-hour trip with a 40-minute dive and a personal certificate at the end. If the wreck is the reason you came, this is the one.
Check-in happens at the welcome desk on Coastal Road in Trou-aux-Biches, at the same site as the restaurant Le Pescatore. Staff greet you there, a welcome drink arrives and the first 15-minute briefing covers the dive while the shuttle boat waits.
Then the boats take over. A short ride out carries you to the offshore mooring platform, where the submarine bobs at the surface.
You climb down the ladder, take a seat, and the hatch seals. The descent to the wreck takes the bulk of 40 minutes underwater, after which the same shuttle returns you to shore.
The rhythm matters for planning the rest of your day. Arrive mid-morning and you are back on land by lunch. From the moment you reach the desk to the moment the boat brings you back, the whole excursion runs 2 hours.
What unfolds underwater is quieter than people expect: the submarine glides, the fish stay close to the windows, and the pilot narrates as the wreck comes into view.
Water off Mauritius stays warm enough for this trip in every month of the year, from about 23 degrees in the southern winter to 29 at the height of summer. Visibility swings far more than temperature does, between roughly 10 and 40 meters.
January: 5 out of 5 for water temperature. 28°C
Tap a month to read it.
January: 207 mm of rain. Warm 28°C seas provide strong visibility, though cyclonic downpours occasionally flush sediment into inshore lagoons.
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May: 2.6 windy days. Drier winter weather sets in with 27°C water, while strengthening trade winds favor sheltered western dive sites.
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December: calm sea on 87% of days. Warm 27°C seas and light winds provide excellent underwater visibility ahead of peak cyclone season.
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August: waves up to 1.6 m on an average day. Water reaches its coolest at 24°C alongside steady trade winds, with minimal rain keeping leeward reefs clear.
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Read the pattern this way. January to March is peak heat, but summer cyclonic rainfall washes sediment through river mouths and temporarily muddies the inshore lagoons, while the outer reefs stay clear.
From May to October the southeast trades blow steadily and stir up chop on exposed coasts. December, with calm water on about three days in four, is the standout.
Within any given day, the first hours decide clarity. Between 6 am and 9 am the sea sits at its flattest and the wind at its lowest; from around 10 am onward thermal breezes build and roughen things through mid-afternoon.
That is why operators run their earliest dives at 8:30 am. The morning slot exists because that is when the water is at its best.
The choice comes down to where you sleep. The base tour sells the dive alone and leaves you to reach Trou-aux-Biches yourself. The Triolet: Submarine Dive with Hotel Transfers collects you from any hotel or villa across the island, which changes the arithmetic if you are staying south or east.
Everything else is the same dive either way: the Star Hope wreck, 35 meters down, 40 minutes underwater, a certificate at the end. What you are paying extra for in the transfer version is the car, the driver and the certainty of arriving on time.
| Check | Why it matters | Our pick |
|---|---|---|
| Hotel transfers included | Reaching the north coast can take an hour or more by road | Yes, pickup and drop-off from any hotel or villa |
| Departure point vs your resort coast | The dive runs from Trou-aux-Biches only | Desk in Trou-aux-Biches, with pickup arranged island-wide |
| Total duration | You need to block the morning or afternoon | About 2 hours of excursion, transfers on top |
| Weather flexibility | Rough swells can move a departure | Booked a day at a time, so it slots in early in your stay |
If you are already staying in the north, the base ticket does the job. Staying at Le Morne or Bel Ombre, the transfers pay for themselves in avoided logistics.
The drive is the part travelers underestimate. From the west at Flic-en-Flac it takes about 56 minutes; from the big east-coast resort clusters, roughly an hour; from Le Morne in the far south, about an hour and a half. Build in Port Louis traffic if your route passes it at rush hour.
Buses, on paper, connect almost everything. In practice no direct bus runs from Flic-en-Flac or Le Morne to Trou-aux-Biches: you change between separate terminals in Port Louis, and the journey stretches past two and a half hours each way. That is not compatible with an 8:30 am boat.
The practical options are a private taxi, a rental car, or a prearranged pickup. The transfer-inclusive tour takes the decision out of your hands entirely, which is worth a lot when a missed briefing means a missed dive.
Whatever you choose, leave a buffer: coastal roads are narrow and morning traffic around the capital adds time.
The boarding is the filter. You transfer between boats and then climb down a vertical ladder of 1.5 to 2 meters into the hatch, so everyone aboard needs the mobility to manage it. High heels and long unslit dresses fail here, which is why flat shoes come up again and again.
Babies ride from the age of 9 months. At the other end of the scale, the cabin cannot accommodate anyone taller than 2 meters, a rare exclusion but a real one.
Health rules are narrower than most people fear. There is no ear-pressure problem, because the cabin stays at surface pressure, and pregnancy is not a barrier.
The firm exclusions are heart problems, where the tour is unsuitable, and severe claustrophobia, where it is not recommended. Mild unease about enclosed spaces usually gives way once the cabin proves dry, bright and air-conditioned.
Everything else, from age to fitness, comes down to that one ladder.
Pack as you would for a boat trip, because the cabin stays dry and air-conditioned from the first minute to the last. Regular comfortable clothing works and swimwear stays in the bag. Loose pants or shorts beat anything tight, since you fold yourself through a hatch.
The one non-negotiable is footwear. Flat or sports shoes with good grip keep you steady across the open-water transfers and down the entry ladder, and the operators are firm about it. High heels, saris and long dresses without slits get left at the desk because they restrict movement on the ladder.
Cameras and phones are welcome, with one adjustment: turn the flash off, or it reflects off the viewing portholes and ruins the shot. Alcohol before the dive is prohibited. If the shuttle ride churns your stomach on other boat trips, take motion-sickness tablets in advance, since the surface transfer is the part that moves.
Rain almost never stops this trip. The west coast dive site sits sheltered, and departures run through rain and even strong easterly winds of 70 to 80 km/h.
What does stop it is a heavy swell from the south-southwest through north-northwest, the direction that brings waves around the reef and makes boarding unsafe or the water murky.
| If this happens | What happens then |
|---|---|
| Heavy swell makes boarding unsafe | the dive is rescheduled for another day, or refunded in full before departure |
| A Cyclone Warning Class II comes into force | all maritime activities are automatically postponed |
| A Cyclone Warning Class III is declared | everything at sea is suspended |
| The route out to the wreck cannot be run | the dive route is adapted, and the trip goes ahead over the reefs |
When the sea wins, the operator reschedules the dive for another day, or returns a full refund if the cancellation happens before departure. Sea conditions can also change the route, so a day that cannot reach the wreck becomes a dive over the reefs instead, and the trip still runs.
This is why regulars book the dive for the first day of the stay. A cancellation on day one leaves four other days to slot into; a cancellation on your last morning leaves nothing.
The engineering answers the questions people actually carry aboard. The pressure hull is tested well beyond its design depth before it ever carries passengers, and the vessel is annually certified by internationally recognized organizations for dives to 50 meters, a margin above the 35 meters this tour reaches.
The backup systems are the part worth knowing. Life support runs on duplicated components with automatic failover, the submarine carries eight independent ways to surface, six of which are tested after every dive, and in an emergency it can reach the surface in under a minute.
Pilots run daily checks and drill regularly. Emergency life support would hold for several days if it ever came to that.
the cabin keeps normal surface pressure the whole dive, so they never do
the water below is far steadier than the surface, and queasiness from the shuttle boat usually settles within minutes of going under
the cabin is dry, bright and air-conditioned, though severe claustrophobia is a genuine exclusion, along with heart conditions
Inside, the experience is calmer than the depth suggests. The cabin keeps normal pressure, so nothing pops and nothing squeezes.
Once submerged, the water is far steadier than the surface, and motion sickness that started on the shuttle boat usually settles within minutes of going under. The genuine exclusions stay what they are: severe claustrophobia and heart conditions.
Plan the rest of the day around the dive's two hours. The seafood restaurant Le Pescatore sits directly at the departure courtyard, so lunch happens without a car. Casual spots run close behind: Refresh Restaurant Pizza Bar about 100 meters off, a Cabane des Fruits de Mer and snack vans along the sand.
Trou-aux-Biches Public Beach lies a 5- to 10-minute walk from the pier, with a calm, shallow lagoon behind the reef that suits family swimming. Beachside boat houses there rent out snorkeling trips and water sports if the morning left you wanting more of the ocean.
Stretch further and the island's north packs in quickly: a Hindu temple within a quarter-hour on foot, the Sir Seewoosagur Ramgoolam Botanical Garden about 20 minutes by car, and the Dodo Museum just beyond it.
A morning dive, a long seafood lunch and an afternoon on that lagoon is the shape most visitors land on, and it is a good one.
Went with our 2-year-old and got a welcome drink. After the briefing we took the boat to the submarine. Very exciting for the little one. Great weather, saw lots underwater.
The dive earns its place on a north-coast itinerary: 40 minutes at 35 meters, dry the whole time, inside a cabin built with more backup systems than most aircraft. Set it on day one of your stay and pair it with lunch and the beach at Trou-aux-Biches.
A submerged cabin 1.5 metres down with easy step boarding, for toddlers and limited mobility.
Compare the boats →The famous cascading sand off Le Morne is an illusion you see from the air, by helicopter or seaplane.
See the flights →Aquariums, underwater restaurants and rooms where the ocean stays in view long after the dive.
Explore the options →Visa rules, the online arrival form and passport validity, so your entry goes as smoothly as your dive.
Check the rules →The things travelers ask before they book: depths, dryness, safety, kids and the sea.
Trou-aux-Biches2026The dive takes you 35 meters down, with about 40 minutes underwater. The whole excursion from check-in to return takes around two hours, including a briefing on shore and a short boat transfer to the offshore platform.
No. The cabin is sealed, air-conditioned and kept at normal atmospheric pressure, so you stay completely dry in regular clothes. Because you never enter the water, non-swimmers can join just as easily as swimmers.
No. The cabin holds a constant one atmosphere of pressure at every depth, so you feel no pressure change or ear discomfort during the descent to 35 meters.
The tour passes coral reefs and the Star Hope shipwreck, sitting upright on a sandy seabed with a 17th-century sheet anchor nearby.
Expect surgeonfish, kingfish and capitaine, and Javanese moray eels and sea turtles around the wreck. At this depth the water filters out red and yellow light, so the scene shows in blue and green tones.
The vessels are certified and inspected annually by internationally recognized organizations. Life-support systems have automatic backups with duplicated components, and the submarine can surface in under 60 seconds using eight independent methods, six of which are tested after every dive. Pilots run daily checks and regular emergency drills.
Infants from 9 months old can board. Every participant needs to be mobile enough to climb down a vertical ladder into the cabin, and the cabin cannot accommodate anyone taller than 2 meters.
Once the submarine submerges, it moves in water far calmer than the surface, so seasickness is not an issue below. The choppy parts are the shuttle boat ride out and boarding while the vessel bobs on the surface, so take those slowly.
Rain and strong easterly winds do not stop operations, because the dive site sits on the sheltered west coast. Rough seas with heavy swells do cancel departures; when that happens, the dive is rescheduled or refunded in full. Booking the dive for early in your stay leaves room to move it.
Count on about an hour by taxi or car from eastern resorts and around an hour and a half from the south, such as Bel Ombre or Le Morne. One tour includes hotel transfers from anywhere on the island; the standard ticket does not, so plan a taxi, rental car or prearranged transfer.
Citizens of the United States and many other countries do not need to apply for a tourist visa before traveling. You do need a passport valid for at least 6 months beyond your stay, a return or onward ticket, and a printed copy of the All in One arrival form.
Wear comfortable clothes and flat shoes with good grip, since you climb down a ladder into the hatch. High heels, long unslit dresses and saris make that transfer difficult, so leave them at the hotel. Cameras and phones are welcome, with the flash turned off to avoid reflections on the portholes.
A submarine keeps you a passive observer at a depth snorkellers rarely reach. If you would rather swim and explore under your own power, snorkeling or a scuba dive suits you better, and glass-bottom boats or underwater sea walks cover the middle ground.
Forty minutes underwater at 35 meters, completely dry in an air-conditioned cabin, with free cancellation up to 24 hours before your dive.
