Best Scuba Diving in Seychelles — Top Dive Sites, Marine Life & Outer Islands

Jun 8, 2026

The best scuba diving in Seychelles is split between the Inner Islands around Mahé, Praslin, and La Digue, which suit all levels, and the remote Outer Islands such as Alphonse, the Amirantes, and Aldabra, which offer advanced pelagic diving. The Inner Islands hold most of the dive centers and are reached by day boats, while the Outer Islands are reached mainly by liveaboard. One Tree Island off Mahé is a top site for reef fish, Trois Bancs is best for walls and pelagics, and the Aldabra and Astove atolls offer the most pristine reefs. Beginners dive the sheltered Inner Island sites, and the best conditions fall in April–May and October–November.

How Diving in Seychelles Is Organized

Dive sites in Seychelles fall into two zones, the Inner Islands and the Outer Islands, and the choice of where to dive depends on the zone, the diver's experience level, and the type of dive. These three factors together determine which sites are realistic for a given trip.

The Inner Islands are the granitic islands around Mahé, Praslin, and La Digue. They hold most of the dive centers, are reached by day boats, and suit all experience levels.

The Outer Islands are the remote coral atolls and reef islands to the south, including Alphonse, the Amirantes, Aldabra, and Astove. They offer pelagic diving and pristine reefs but are reached mainly by liveaboard.

Dive types in Seychelles include reef dives, pinnacle dives, wall and drop-off dives, drift dives, and a smaller number of wreck dives. The site's dive type determines the experience level it requires.

Diving is done in one of two ways: land-based day diving from dive centers on the Inner Islands, or liveaboard diving for the Outer Islands. The method follows directly from which zone the sites are in.

Best Dive Sites in the Inner Islands

The Inner Islands around Mahé, Praslin, and La Digue concentrate most of the country's dive centers and dive sites, and they suit all experience levels. The sites are built on granite formations, with reefs at moderate depths and generally good access by day boat.

The sites below are the most established in the Inner Islands, grouped by the island they are divided from.

One Tree Island — Reef-Fish Dive

One Tree Island is a shallow granite dive site with generally good visibility, best known for reef fish. It is suited to beginner and intermediate divers.

The site sits on a granite substrate that attracts moray eels and stingrays. Divers commonly see large numbers of reef fish and humphead parrotfish, and observant divers may spot the elusive ghost pipefish. The depths are shallow, making the site accessible to less experienced divers.

Brissare Rocks and Shark Bank — Mahé Pinnacle Sites

Brissare Rocks and Shark Bank are granite pinnacle sites off Mahé, known for dense fish life and encounters with larger marine animals. They are best suited to intermediate divers because currents can be strong.

Both sites rise as granite pinnacles surrounded by schooling fish. Divers regularly see large schools of fish and stingrays, and whale sharks pass through in season. The sites are divided from Mahé.

Île Cocos and Ave Maria Rocks — Praslin and La Digue Sites

Île Cocos and Ave Maria Rocks are reef sites dived from Praslin and La Digue, suited to beginner and intermediate divers. They are also popular snorkeling sites because of their shallow, clear water.

The sites feature granite-and-reef formations with abundant reef fish and sea turtles. They are reached by short boat trips from Praslin and La Digue.

Best Dive Sites in the Outer Islands

The Outer Islands, including Alphonse, the Amirantes, Aldabra, and Astove, offer the most pristine reefs and the best pelagic diving in Seychelles, but they are reached mainly by liveaboard or an extended boat trip. Their distance from the main islands is what keeps them undeveloped and uncrowded.

The sites below are among the best in the Outer Islands, listed with their access requirements.

Trois Bancs — Wall and Drift Dive

Trois Bancs is a set of three granite-based reefs with steep drop-offs, vertical walls, ledges, and small caves. It is an advanced site because the currents can be strong.

Divers drift along the walls and over the drop-offs, where the currents attract big pelagics, reef sharks, and turtles. Whale sharks appear when they are in season. The strong currents make the site unsuitable for inexperienced divers.

Napoleon (Alphonse Island) — Soft Coral and Macro

Napoleon is one of the best dive sites off Alphonse Island, covered in soft corals with abundant fish life. It suits intermediate and advanced divers.

The site is known for soft corals, strong macro life, and manta ray encounters. It is divided from Alphonse Island in the Outer Islands.

Aldabra and Astove — Remote Atoll Diving

Aldabra and Astove are the most remote atolls in Seychelles, offering world-class drop-off diving. Access is available only via liveaboard or private tour, and trips to Aldabra must be pre-approved.

These atolls feature steep drop-offs, channels, and very high fish density, with sharks, eagle rays, and turtles. The diving is advanced, and the remoteness means a liveaboard is effectively the only way to reach the sites.

Seychelles Dive Sites Compared

Seychelles dive sites are most easily compared across five parameters: zone, dive type, level, key species, and access. Reading down these columns shows which site fits a given diver.

Site	Zone	Dive type	Level	Key species	Access
One Tree Island	Inner	Reef	Beginner–intermediate	Moray eels, parrotfish, ghost pipefish	Day boat from Mahé
Brissare Rocks / Shark Bank	Inner	Pinnacle	Intermediate	Schooling fish, stingrays, whale shark (season)	Day boat from Mahé
Île Cocos / Ave Maria	Inner	Reef	Beginner–intermediate	Reef fish, turtles	Day boat from Praslin/La Digue
Trois Bancs	Outer	Wall/drift	Advanced	Pelagics, reef sharks, turtles	Liveaboard
Napoleon (Alphonse)	Outer	Reef/macro	Intermediate–advanced	Soft corals, mantas, macro	Alphonse Island
Aldabra / Astove	Outer	Atoll drop-off	Advanced	Sharks, eagle rays, high fish density	Liveaboard, pre-approval

To use the table, match your experience level and the species you want to see, then check the access column to confirm whether the site needs only a day boat or a liveaboard. Inner Island sites are reachable on a standard trip, while Outer Island sites require a liveaboard or extended voyage.

Best Diving by Level and Interest

The best dive site depends on your experience level and what you want to see, and the recommendations below map common diver profiles to specific sites.

Beginners: sheltered Inner Island reef sites such as One Tree Island and Île Cocos, where depths are shallow, and currents are mild.
Walls and drop-offs: Trois Bancs, for steep vertical walls and drift diving.
Sharks and pelagics: the Outer Islands, where reef sharks, whale sharks, and other large species are most common.
Mantas and macro: Napoleon off Alphonse Island, known for soft corals and manta encounters.
Pristine, untouched reefs: the Aldabra and Astove atolls, reached by liveaboard.
Pinnacle dives with schooling fish: Brissare Rocks and Shark Bank off Mahé.

Diving Conditions and Marine Life

Diving conditions in Seychelles are stable, with water temperatures of about 28–30°C (83–86°F), visibility often up to 30 meters (100 feet), and most diving between 8 and 30 meters deep. These conditions hold across both zones, though visibility is highest in the calm-sea months.

Around the inner reefs, divers commonly see angelfish, butterflyfish, octopus, lionfish, nudibranchs, and mantis shrimp. These are the typical species on Inner Island day dives.

Slightly further out, divers encounter Napoleon and humphead wrasse, schools of humphead parrotfish, stingrays, reef sharks, and green and hawksbill turtles. These species are common on the outer reefs of the Inner Islands.

Around the Outer Islands, the larger pelagics dominate, including manta rays, whale sharks, silvertip and oceanic whitetip sharks, and occasionally hammerheads. The open-water location is what brings these species in.

Best Time to Dive in Seychelles

Diving in Seychelles is possible year-round, but the best conditions occur in April–May and October–November, when the seas are calmest and visibility is highest. These two windows fall between the monsoon seasons.

During calm windows, water temperatures can reach about 29°C, and visibility can extend up to 30 meters, improving both reef and pelagic dives.

Whale sharks are most often seen around November, with additional sightings logged in April and December. Timing a trip to these months raises the chance of an encounter.

The windier monsoon periods bring rougher seas and reduced visibility, making crossings to the Outer Islands less comfortable.

How to Dive Seychelles - Liveaboard vs Land-Based

There are two ways to dive Seychelles: land-based day diving from dive centers on the Inner Islands, and liveaboard diving for the Outer Islands. The choice follows from which sites you want to dive.

Land-based diving operates from dive centers on Mahé, Praslin, and La Digue, using day boats to reach Inner Island sites. It suits all experience levels and requires no multi-day commitment.

Liveaboard diving is used for the Outer Islands, where sites such as Alphonse, the Amirantes, Aldabra, and Astove are too far to reach by day trip. A liveaboard covers several remote sites over a multi-day route.

Modern rental equipment is available at most dive centers in Seychelles, though repair facilities for divers' own gear can be limited. The only international gateway is Seychelles International Airport (SEZ) on Mahé.

Charter a yacht for an unforgettable diving experience

The most rewarding dive sites are spread across open water, and many of the best Outer Island locations have no day-trip access at all. Renting a yacht is one of the few ways to reach them on your own schedule: with a charter from an operator such as CharterClick, you can sail from Mahé and anchor at the remote spots that day boats never reach, diving the most sought-after sites along the way.

Frequently Asked Questions

Where is the best scuba diving in Seychelles?

The best diving is split between the Inner Islands and the Outer Islands. The Inner Islands around Mahé, Praslin, and La Digue suit all levels, while the Outer Islands, such as Alphonse, Aldabra, and Astove, offer the most pristine reefs and pelagic diving.

Which dive sites are best for beginners?

The best beginner sites are the sheltered Inner Island reefs such as One Tree Island and Île Cocos. They have shallow depths, generally good visibility, and mild currents.

Can you see whale sharks diving in Seychelles?

Yes, whale sharks are seen in the Seychelles, most often around November, with additional sightings in April and December. They are most common at the pinnacle and Outer Island sites.

Should I dive the Inner Islands or the Outer Islands?

Dive the Inner Islands for easy, all-level day diving from Mahé, Praslin, and La Digue. Choose the Outer Islands for advanced pelagic diving and pristine reefs, reached by liveaboard.

Do I need a liveaboard to dive in Seychelles?

You do not need a liveaboard for the Inner Islands, which are dived from land-based centers. A liveaboard is needed for the Outer Islands, where remote sites like Aldabra and Astove are too far for day trips.

When is the best time to dive in Seychelles?

The best time is April–May and October–November, when the seas are calmest and visibility is highest. These windows also coincide with the main whale shark sightings.

What are the water temperature and visibility like?

Water temperatures average about 28–30°C (83–86°F), and visibility is often up to 30 meters (100 feet). Visibility is best during the calm-sea months.

Where can you see manta rays in Seychelles?

Manta rays are seen at Outer Island sites, especially Napoleon off Alphonse Island. The Outer Islands, in general, offer the most reliable encounters with large pelagics.

Do you need a diving certification to dive in Seychelles?

You need an open-water certification to join standard guided dives. Beginners without certification can still dive through a supervised introductory program such as PADI Discover Scuba Diving.

Quick Decision Guide

Beginner diver → Inner Island reef sites such as One Tree Island and Île Cocos.
Want walls and current → Trois Bancs.
Want sharks and pelagics → the Outer Islands.
Want mantas and macro → Napoleon off Alphonse Island.
Want pristine atoll reefs → Aldabra and Astove, by liveaboard.
Want pinnacle dives off Mahé → Brissare Rocks and Shark Bank.
Best conditions → dive in April–May or October–November.
Want to reach several remote sites in one trip → a liveaboard or extended boat route.