Introduction
The Andaman Islands are an archipelago of 572 islands in the Bay of Bengal, stretching roughly 800 km in a north-south arc between Myanmar and Sumatra. Part of the Indian Union Territory of the Andaman and Nicobar Islands, only 37 of the islands are permanently inhabited. The archipelago lies approximately 1,370 km from the Indian mainland, making it one of the most geographically remote parts of India.
The islands are renowned for three extraordinary distinctions: they harbor some of the world's last uncontacted indigenous peoples, including the Sentinelese of North Sentinel Island; their coral reefs and tropical forests rank among the most biodiverse ecosystems in South and Southeast Asia; and the Cellular Jail in Port Blair stands as a haunting monument to British colonial imprisonment of Indian independence activists. This combination of anthropological significance, ecological richness, and historical weight makes the Andamans uniquely compelling.
Geography & Landscape
- Total Islands: 572
- Inhabited: 37
- Highest Point: Saddle Peak (732 m, North Andaman)
The Andaman Islands are the emergent peaks of a submerged mountain range that connects the Arakan Yoma mountains of Myanmar with the volcanoes of Sumatra, running along the eastern edge of the Indian tectonic plate. The terrain is hilly and densely forested, with narrow coastal plains, mangrove-lined creeks, and fringing coral reefs. The islands are composed primarily of sedimentary rock, with some volcanic formations, particularly on Barren Island — India's only active volcano.
The 2004 Indian Ocean tsunami caused significant damage to the Andaman and Nicobar Islands, with some areas experiencing uplift of up to 1-2 meters while others subsided. This tectonic event permanently altered the coastline and destroyed some coral reefs, though natural recovery has been substantial. The islands' coastline features white sand beaches, sea caves, limestone formations, and dense mangrove ecosystems that serve as vital fish nurseries.
Climate & Environment
- Climate: Tropical wet
- Average Temperature: 23-31°C year-round
- Annual Rainfall: 3,000+ mm
- Best Season: November to February
The Andaman Islands have a tropical wet climate with high humidity year-round and two monsoon seasons — the southwest monsoon from May to September and the northeast monsoon from November to January. Annual rainfall exceeds 3,000 mm, supporting dense tropical and mangrove forests. The dry season from February to April offers the best visibility for diving and snorkeling.
The surrounding waters are warm year-round (26-30°C), supporting extensive coral reef development. The Andaman Sea is relatively sheltered from the open Indian Ocean, resulting in calmer conditions and excellent underwater visibility, particularly on the western coast. Cyclones occasionally affect the islands, though they are less frequent than in the Bay of Bengal to the west.
Ecology & Biodiversity
- Coral Species: Over 500
- Forest Cover: ~86% of land area
- Endemic Species: Andaman horseshoe crab, Narcondam hornbill
The Andaman Islands' coral reefs are among the richest in India, supporting over 500 coral species, over 1,200 fish species, and important populations of sea turtles, dugongs, and saltwater crocodiles. Havelock Island (Swaraj Dweep) and Neil Island (Shaheed Dweep) offer some of the best snorkeling and diving in South Asia, with sites like Elephant Beach and Radhanagar Beach providing easy access to vibrant reef systems.
Roughly 86% of the islands' land area remains forested, supporting a rich terrestrial biodiversity that includes the Andaman wild pig, crab-eating macaques, and the Narcondam hornbill — a critically endangered bird found only on the tiny volcanic island of Narcondam. The mangrove ecosystems of the Andamans are among the most extensive in India, covering over 600 km² and providing critical habitat for juvenile fish and crustaceans that support both the marine ecosystem and local fisheries.
Culture & History
- Population: ~434,000
- Capital: Port Blair
- Indigenous Groups: Great Andamanese, Onge, Jarawa, Sentinelese
- Colonial History: Cellular Jail built 1896-1906
The Andaman Islands are home to four indigenous groups — the Great Andamanese, Onge, Jarawa, and Sentinelese — whose ancestors are believed to have migrated from Africa over 60,000 years ago, making them among the most ancient human populations outside Africa. The Sentinelese of North Sentinel Island have rejected all contact with the outside world, and the Indian government enforces an exclusion zone to protect their isolation. The Jarawa, who only established peaceful contact in the late 1990s, remain highly vulnerable.
The British established a penal colony in the Andamans in 1858, and the Cellular Jail in Port Blair, completed in 1906, became notorious as "Kala Pani" (Black Water), where Indian independence activists were imprisoned under brutal conditions. The jail's seven wings radiating from a central tower were designed to keep prisoners isolated. Many of India's most prominent freedom fighters, including Vinayak Damodar Savarkar, were incarcerated here. The Cellular Jail is now a national memorial.
Visitor Highlights
- Beach: Radhanagar Beach (Havelock Island)
- Historical Site: Cellular Jail, Port Blair
- Diving: Havelock and Neil Islands
Radhanagar Beach on Havelock Island has been repeatedly ranked among Asia's best beaches, with its long crescent of white sand backed by tropical forest and fringed by a shallow reef perfect for snorkeling. The diving around Havelock and Neil islands offers encounters with manta rays, reef sharks, and spectacular coral gardens at sites like Elephant Beach and Lighthouse.
The Cellular Jail in Port Blair is a deeply moving historical site, with a nightly light-and-sound show narrating the stories of the freedom fighters imprisoned there. Ross Island (Netaji Subhas Chandra Bose Island), the former British administrative headquarters, is now an atmospheric ruin being reclaimed by tropical vegetation and wild deer. Barren Island, India's only active volcano, can be visited on day trips from Port Blair for snorkeling and volcano viewing.
Key Facts
- The Andaman Islands comprise 572 islands, of which only 37 are permanently inhabited.
- The Sentinelese of North Sentinel Island are one of the world's last uncontacted peoples.
- The archipelago's coral reefs support over 500 coral species and 1,200 fish species.
- The Cellular Jail in Port Blair, built 1896-1906, imprisoned Indian independence activists under brutal conditions.
- Barren Island is the only active volcano in India and the entire Indian subcontinent.
Fun Facts
- The indigenous Andamanese peoples are believed to descend from some of the earliest humans to leave Africa, with genetic lineages stretching back over 60,000 years.
- In 2018, an American missionary was killed by the Sentinelese after illegally attempting to contact them — the Indian government did not attempt to retrieve his body.
- The Andaman Islands' name may derive from "Handuman," a Malay rendering of Hanuman, the Hindu monkey god.
- During WWII, the islands were occupied by Japan, and Netaji Subhas Chandra Bose symbolically raised the Indian flag there in 1943.
Final Thoughts
The Andaman Islands are India's most remote and extraordinary frontier — a place where some of humanity's oldest living cultures coexist near pristine coral reefs and the haunting remains of colonial oppression. The combination of world-class natural beauty, anthropological significance, and historical weight makes this archipelago one of the most remarkable island groups in Asia.