Nicobar Islands

India

Diving in Nicobar Islands

9 sites88 species27–30 °C15–30 m vis

Photo: Nabil Naidu / Pexels

The Nicobar Islands are India's last diving frontier — a 22-island archipelago at the maritime boundary of the Bay of Bengal and Andaman Sea that remains one of the most restricted and untouched dive destinations on Earth. Fringing reefs, seamounts, and deep channels host reef sharks, manta rays, sea turtles, and the rare dugong. With zero dive operators, no hyperbaric chamber, and access requiring special government permits, this is expedition diving in its rawest form — for those who crave true solitude beneath the surface.

Indira Point on Great Nicobar is the southernmost point of India — the reef here sits at 6°45'N, closer to the equator than any other Indian dive site.The 2004 Indian Ocean tsunami permanently reshaped the Nicobar Islands. Indira Point subsided 4.25 meters, Teressa Island split in two, and Trinket split into three — creating new underwater topographies still being explored.The Nicobar Islands are home to the critically endangered leatherback turtle, which nests on Galathea Bay's beaches from December to April. This is one of the most important leatherback nesting sites in the Indian Ocean.Dugongs — rare, gentle sea cows related to manatees — graze the extensive seagrass meadows around Car Nicobar and Katchal Island. The Nicobar population is one of the last strongholds for dugongs in Indian waters.The Great Nicobar Biosphere Reserve, designated a UNESCO World Biosphere Reserve in 2013, protects 103,870 hectares of rainforest, mangrove, and marine ecosystems — one of the largest protected areas in the region.The Nicobar Islands are a Protected Aboriginal Tribe Reserve. Foreign nationals are not permitted to visit, and even Indian citizens require special Restricted Area Permits — making this arguably the most exclusive dive destination on the planet.Campbell Shoal, documented by SSI as a 4.9/5.0 rated site, is a seamount rising from 40 meters nearly to the surface. Its nutrient-rich upwellings attract a concentration of marine life rarely seen elsewhere in the Bay of Bengal.There are exactly zero dive shops or operators across all 22 Nicobar Islands. Any diving here requires a completely self-sufficient expedition with your own equipment, compressor, and medical support.The Ten Degree Channel, which separates the Nicobar Islands from the Andaman Islands 380 km to the north, is one of the deepest passages in the Bay of Bengal — exceeding 1,000 meters and serving as a major migration corridor for pelagic species.Tillangchong Island is a completely uninhabited wildlife sanctuary where seabird colonies, turtle nesting beaches, and pristine fringing reefs exist exactly as they have for millennia — zero human footprint on land or underwater.

Explore the map

Select a pin to learn more. Use the zoom buttons or pinch to zoom.

Loading map…

Places on this map (3)
  • Enriched
  • Enriched
  • Enriched

6 places have no verified map location yet. Browse the page lists for more places.

Conditions

Water temp

27–30 °C

Visibility

15–30 m

Depth

2–40 m

Current

Moderate

Best season

November – May (northeast monsoon: calm seas, peak visibility 20–30 m)

MonthSummary
JanPeak diving month with 27 °C water and excellent 22–25 m visibility. Calm northeast monsoon seas open all sites. Turtle nesting peaks on Galathea Bay beaches.
FebStable 27 °C water and excellent visibility persist. Best month for Campbell Shoal — reef sharks and schooling jacks are abundant on the seamount.
MarWater warms to 28 °C with very good visibility. Ideal month for combining seamount dives at Campbell Shoal with reef exploration at Indira Point.
AprWater peaks at 29 °C. Visibility drops slightly to 20–22 m but conditions remain excellent. Last month of reliable turtle nesting activity.
MayTransition month at 29 °C with 18–20 m visibility. Southwest monsoon signal begins — winds pick up. Still divable but access to outer sites may narrow.
JunSouthwest monsoon arrives: 28 °C water, visibility drops to 14–17 m. Rough seas limit diving to protected bays. Campbell Bay fringing reefs are the most reliable option.
JulFull monsoon conditions: 28 °C water, 14–17 m visibility, strong currents. Least divable month. Diving not recommended except for scientific expeditions with flexible schedules.
AugMonsoon persists: 28 °C water with 14–17 m visibility. Rough seas and strong currents continue. Shore-accessible fringing reefs offer the only realistic diving.
SepMonsoon begins tapering: 28 °C water with improving 16–18 m visibility. Winds ease toward month's end. The archipelago starts opening up again.
OctTransition to favorable conditions: 28 °C water, 18–20 m visibility. Seas calm noticeably. Good month for the northern sites — Car Nicobar and Tillangchong become accessible.
NovNortheast monsoon establishes: 28 °C water with 20–22 m visibility. Calm seas return across the archipelago. Dugong sightings possible at Katchal and Car Nicobar seagrass beds.
DecExcellent diving returns at 27 °C with 22–25 m visibility. All sites fully accessible. The Nicobars deliver their finest conditions of the year — a remarkable month for expedition diving.

Dive Sites (9)

Campbell Bay Fringing Reefs

2–20m · Beginner

Fringing reef · Coral garden

Sandy patches

Campbell Shoal

5–40m · Advanced

Coral garden · Pelagics

seamount

Car Nicobar Fringing Reefs

2–20m · Intermediate

Fringing reef · Seagrass · Coral garden

Galathea Bay Coral Reefs

2–25m · Intermediate

Fringing reef · Seagrass

mangrove

Indira Point Reefs

3–30m · Advanced

Wall · Pelagics

Reef slope

Katchal Island Reefs

2–18m · Intermediate

Fringing reef · Seagrass

Coral recovery

Little Nicobar Coral Reefs

2–25m · Advanced

Fringing reef · Pinnacle · Coral garden

Nancowry-Kamorta Channel Reefs

3–30m · Advanced

Wall · Pelagics

channel

+1more sites in the appGet the app →

Regional species catalogue (88)

Species recorded in this destination's wider regional catalogue. A species being listed here does not mean it is seen at this destination — check the note on each card.

Loggerhead Turtle

Loggerhead Turtle

General species description, not specific to this destination

The Loggerhead Turtle is the largest hard-shelled sea turtle, named for its massive head. While less common than Green and Hawksbill turtles on Caribbean reefs, they can be spotted at deeper reef sites.

Bull Shark

Bull Shark

General species description, not specific to this destination

Bull sharks are one of the most impressive predators divers can encounter in warm coastal waters. These robust sharks are easily recognized by their broad, blunt snout, stocky build, and grey coloration with a white underside. Growing up to 11 feet long, they have a powerful, muscular appearance that commands respect underwater. Bull sharks are known for their curious nature and may approach divers, maintaining a confident but generally non-aggressive demeanor. They're often seen cruising along reef walls or in open water, sometimes in small groups. Their ability to tolerate both saltwater and freshwater makes them unique among sharks, and they're excellent hunters with a varied diet including fish, rays, and other marine life.

Great Hammerhead

General species description, not specific to this destination

The Great Hammerhead is the largest of all hammerhead species, instantly recognizable by its massive, flattened head extension called a cephalofoil. This prehistoric-looking predator can reach lengths of up to 20 feet, with a distinctive tall, sickle-shaped dorsal fin. Their unique head shape houses electroreceptors that help them hunt stingrays buried in sand. Great Hammerheads are solitary hunters, often seen cruising along reef walls and sandy bottoms. Despite their intimidating size, they're generally shy around divers and will often move away when approached. Their powerful swimming style and graceful movements make encounters truly memorable for fortunate divers.

Hawksbill Turtle

Hawksbill Turtle

Destination note

Found year-round around coral reefs; commonly seen at Campbell Bay and Galathea Bay

Green Sea Turtle

Green Sea Turtle

Destination note

Common around seagrass beds and fringing reefs throughout the Nicobar archipelago

Spotted Eagle Ray

Spotted Eagle Ray

Destination note

Occasionally seen gliding over sandy flats and reef edges, particularly around Car Nicobar and Campbell Bay seagrass beds

Atlantic Bottlenose Dolphin

Atlantic Bottlenose Dolphin

Destination note

Small pods occasionally sighted in the Ten Degree Channel, Indira Point, and passes between islands; more common during the northeast monsoon

Bigeye Thresher Shark

General species description, not specific to this destination

The bigeye thresher shark is a large pelagic shark with enormous eyes and an exceptionally long upper tail lobe used to stun schooling fish. Its body is metallic gray to purplish above and pale below, with a compact head adapted for low-light hunting. Divers most often encounter it in open water or near deep drop-offs rather than on shallow reefs.

Andaman Butterflyfish

General species description, not specific to this destination

A regional butterflyfish with a laterally compressed body, pointed snout, and contrasting pale, yellow, and dark markings typical of the genus Chaetodon. Fine head bands and body patterning help separate it from similar Indian Ocean butterflyfishes. Its form is adapted for maneuvering among coral branches and reef surfaces.

Dusky Shark

Dusky Shark

General species description, not specific to this destination

A marine organism known as Dusky Shark (Carcharhinus obscurus). Found in oceanic environments.

Pacific Nurse Shark

Pacific Nurse Shark

General species description, not specific to this destination

A marine organism known as Pacific Nurse Shark (Ginglymostoma unami). Found in oceanic environments.

Great Barracuda

Great Barracuda

Destination note

Common at Campbell Shoal and reef channel edges; often seen in small groups

+76more species in the app

Dive shops

No dive shops are listed for this destination yet.

Guides

Safety

Emergency

DAN Emergency Hotline (24/7 diver emergency coordination)

+1-919-684-9111

Coast guard

Indian Coast Guard — Port Blair (Maritime SAR)

+91-3192-245555

Hospital

GB Pant Hospital — Port Blair (major referral hospital)

+91-3192-230111

Police

Andaman & Nicobar Police (emergency)

112

Hyperbaric chamber

Clearance Diving Unit (Indian Navy) — Port Blair (nearest recompression chamber, ~380 km north)

+91-3192-252555

Hyperbaric chamber

No verified recompression chamber on record.

Contact DAN: +1 919 684 9111

Bring Nicobar Islands underwater

Offline access, dive log, AI fish ID, live site maps, and trip planning.

Download on the App Store