Mauritius Snorkelling Guide: Best Spots and What to See

Where to Snorkel in Mauritius

Mauritius sits on a volcanic plateau surrounded by one of the world's largest unbroken coral reef systems. The island's protected lagoons and marine parks offer exceptional snorkelling opportunities for everyone from nervous first-timers to experienced free-divers. The water temperature hovers between 23°C and 28°C year-round, meaning you'll spend hours in the water without realising it.

Blue Bay Marine Park: The Gold Standard

Blue Bay Marine Park, on the south-eastern coast near Mahébourg, consistently ranks as Mauritius's finest snorkelling destination. This protected marine reserve prohibits fishing and anchoring, allowing the reef ecosystem to flourish in ways you simply won't see elsewhere on the island. The coral gardens here display an extraordinary colour palette—vivid purples, electric blues, and sunset oranges—whilst schools of parrotfish munch audibly on the coral, their bright colours flashing as they dart between formations.

The water depth rarely exceeds three metres across most of the snorkelling area, making it wonderfully accessible. You'll likely encounter hawksbill turtles grazing on sponges, their beautiful shell patterns clearly visible in the crystalline water. Green turtles also frequent the bay, often surfacing for air mere metres from snorkellers. Sergeant majors, angelfish, and trumpet fish are permanent residents, whilst the occasional octopus can be spotted if you're observant and patient.

Access Blue Bay either from the public beach (free entry, though you'll pay for parking) or via glass-bottom boat tours departing from Pointe d'Esny. The boat option drops you at prime spots and costs around Rs 1,500–2,000 per person.

Coin de Mire: For the Adventurous

This distinctive flat-topped islet off the northern coast near Grand Baie represents a step up in difficulty. The crossing involves open sea conditions, and currents can be robust, but the payoff is extraordinary visibility—often exceeding 30 metres—and larger pelagic species. Tour operators run full-day catamaran excursions (approximately Rs 2,500–3,500) that typically combine Coin de Mire with snorkelling stops at Flat Island and Île Ronde.

Expect to see stingrays gliding over sandy patches, reef sharks patrolling the drop-offs, and if you're fortunate, dolphins in transit. The water here is noticeably bluer and clearer than lagoon snorkelling, though the increased depth and wave action mean this isn't suited to beginners or weak swimmers.

Île aux Cerfs: Perfect for Novices

The expansive lagoon surrounding Île aux Cerfs on the east coast offers gentle conditions ideal for building confidence. The water remains shallow for dozens of metres from shore, currents are minimal, and the sandy bottom provides psychological comfort for those anxious about deep water. Whilst the coral coverage isn't as spectacular as Blue Bay, you'll still encounter colourful reef fish, and the occasional turtle patrols the seagrass beds.

Most visitors reach Île aux Cerfs via boat transfer from Trou d'Eau Douce (Rs 300–400 return). Several operators offer snorkelling equipment hire directly on the island, though quality varies considerably.

Flic en Flac: Easy Beach Access

The western coastline at Flic en Flac provides the convenience of simply walking off the beach into snorkelling territory. Coral patches dot the lagoon approximately 50–100 metres offshore, attracting damselfish, wrasse, and the occasional moray eel peering from crevices. The reef here has suffered from development pressure over the decades, but restoration efforts are showing promising results.

This spot suits families and those who prefer the flexibility of shore-based snorkelling without boat schedules. The beach offers numerous equipment rental shops, though buying your own mask makes financial sense if you're staying more than a few days.

Mahébourg Bay: Historic Underwater Exploration

For something different, the Mahébourg bay area features historic shipwrecks from the Napoleonic naval battle of Grand Port in 1810. The wrecks sit in relatively shallow water, their timbers now home to diverse marine life. Local guides offer specialised tours (around Rs 1,800–2,500) that combine snorkelling with historical context about the Franco-British engagement.

Marine Life You'll Encounter

Mauritius's reefs host over 1,000 fish species. You're almost guaranteed to see parrotfish in various sizes and colours, angelfish gliding gracefully, and schools of fusiliers creating silvery clouds. Moray eels inhabit coral holes—intimidating to look at but harmless if left undisturbed. Both hawksbill and green turtles appear regularly, particularly in protected areas like Blue Bay.

Stingrays and eagle rays frequent sandy areas, whilst reef sharks (mainly blacktip reef sharks) patrol deeper sections. These small sharks pose no threat to snorkellers and typically maintain respectful distances.

Best Season for Visibility

May through November offers peak conditions. These winter months bring calmer seas, reduced rainfall, and visibility often exceeding 25 metres in protected areas. December to April remains perfectly viable, though occasional cyclonic systems and summer rains can temporarily cloud coastal waters. Check recent conditions with your hotel or tour operator.

Equipment: Hire or Buy?

Hotel equipment hire typically costs Rs 300–500 daily for mask, snorkel, and fins—adequate for occasional use but often poorly maintained. Independent operators and beach vendors charge Rs 200–300 for better quality gear. If you're staying a week or more, purchase your own mask at Super U or Shoprite (Rs 800–1,500 for decent quality) and snorkel hire fins separately. A properly fitted mask transforms the experience entirely.

Safety Essentials

Never touch or stand on coral—it damages the reef and can cause painful cuts that heal slowly. Wear a rash vest or UV swim shirt for sun protection; the combination of water reflection and tropical sun causes severe burns faster than you'd imagine. In areas with boat traffic, particularly around Île aux Cerfs and Grand Baie, use a brightly coloured float or stay close to your group. Strong currents occasionally affect channels between the reef and open ocean—if you feel yourself being pulled seaward, swim parallel to shore until clear of the current, then head for land.

Guided snorkel tours operate from virtually every coastal hotel and through independent operators island-wide, with prices ranging from Rs 1,500 for basic lagoon trips to Rs 4,000 for full-day catamaran adventures including lunch.