Andaman Islands Reefs

A Morning at Andaman Islands Reefs

When Sarah from our BugBitten team slipped off the back of a day boat somewhere between Port Blair and North Bay, she expected decent coral. She did not expect a sea fan wider than her armspan swaying in the current at eight metres, surrounded by a wall of glassfish so dense the light turned silver. She surfaced forty-five minutes later talking too fast, mask still pushed up on her forehead, asking the divemaster when the next boat went out.

That reaction is pretty common out here. The Andaman Islands occupy a strange geography — politically Indian, geographically closer to Myanmar and Thailand, and mentally very far from the package-tour India most travellers know. The reefs carry that same quality of remove. They are not pristine in the way of a stock photograph where nothing has ever gone wrong. Some shallower sections closer to Port Blair show bleaching stress and the usual scars of anchor damage. But go deeper, go further out, go to places that require a liveaboard and three days at sea, and you find coral ecosystems that feel genuinely intact — dense, layered, and full of fish that haven't learned to scatter when divers approach.

This piece is for anyone planning a diving or snorkelling trip to the Andamans and wanting to know what they're actually getting into: what's worth the travel, what the logistics look like, and where the rough edges are.

What Makes These Reefs Worth Your Time

The short answer is low traffic and warm, clear water. Visibility regularly sits between 20 and 30 metres at well-regarded sites, and the water temperature hovers around 27 to 29 degrees Celsius year-round — warm enough that many divers go without a full wetsuit, though a 3mm shortie still earns its place on longer dives.

The longer answer involves the fish life. Schooling fusiliers, yellowfin tuna, reef sharks patrolling the drop-offs, moray eels tucked into coral heads, and the occasional manta ray drifting through on its own schedule. Whale sharks move through seasonally, particularly around the outer islands, and although encounters are never guaranteed, the frequency of sightings reported between December and April makes the timing worth planning around. What genuinely sets the Andamans apart from busier dive destinations in Southeast Asia is the unbothered quality of the marine life. When fish don't associate humans with food handouts or boat noise, they behave differently. They hold their position. They carry on feeding. That low-disturbance environment is increasingly rare in this part of the world, and it shows in the water.

Sea fans deserve a specific mention because they are extraordinary here. At sites like Lighthouse and the deeper reaches around Barren Island, you'll find gorgonian fans growing to the size of doorways — some larger — in shades of deep orange, yellow, and burgundy. They're filter feeders that need current, and the Andamans have current in abundance, which partly explains why they grow so large and why the fish life is so dense.

How the Area Feels

Port Blair is the entry point for almost everyone and it earns mixed reviews as a town. It's functional rather than charming — a busy administrative hub with ferry terminals, dive operators, and guesthouses stacked along the waterfront roads. The Cellular Jail is here, a sobering colonial-era prison that the British used to exile Indian independence activists to what was then considered the back of beyond. It's worth a morning of your time before you head to the water.

Most serious divers pass through Port Blair quickly and head straight to Havelock Island, now officially renamed Swaraj Dweep on Indian government maps (though most locals and virtually all tourists still call it Havelock). The ferry crossing takes two to three hours depending on whether you book a fast catamaran or a slower government vessel. Havelock has a different rhythm entirely — smaller, quieter, dominated by dive operators and guesthouses that cater specifically to people who want to spend most of their time in the water. Radhanagar Beach on the island's western side consistently ranks among the finest beaches in Asia, and it's easy to see why: a long crescent of white sand with no resort development hemming it in.

For travellers who want to explore beyond the usual Indian tourist circuit, the Andamans sit in interesting company. India rewards those willing to move between very different environments — the Chilika Lake bird sanctuary on the Odisha coast and the coral reefs of the Andamans represent the same country's extraordinary geographic range, separated by roughly 1,200 kilometres of Bay of Bengal.

What to Actually Do Here

Diving

Diving is the main event and the sites vary considerably in character. North Bay is accessible on a day trip from Port Blair and suits beginners — shallow gradients, mixed hard and soft coral, and decent fish life without demanding conditions. Lighthouse on Havelock is a step up: a sloping reef with stronger current and the chance of shark encounters at the bottom of the slope. The more advanced sites — Neil Island's wall dives, the drift-heavy passages around the outer atolls — call for an Advanced Open Water certification and some comfort with moving water.

Barren Island is the standout destination for anyone willing to do the liveaboard. India's only active volcano breaks the surface about 135 kilometres northeast of Port Blair. Above water it's dramatic and otherworldly; below water the volcanic substrate has been colonised by coral in unusual formations, and the fish life around the seamount is exceptional. The currents can be challenging and conditions change quickly, but experienced divers consistently rate it among the most memorable dives in the Indian Ocean.

Established operators Barefoot Scuba and Dive India are the two most commonly recommended companies for Havelock-based diving. Both have been operating long enough to have sorted out their logistics, and their safety records hold up to scrutiny. That said, equipment quality across the Andamans is variable. If you're particular about mask fit or wetsuit thickness, bring your own. Rental regulators and BCDs are generally serviceable but not always well-maintained.

Snorkelling

Snorkellers are not an afterthought here. Elephant Beach on Havelock offers shallow coral gardens with excellent fish diversity accessible within twenty metres of shore. Glass-bottomed boats operate from several points and give non-divers a reasonable window into what's happening below, though there's no real substitute for getting in the water yourself.

When to Go (and When Not To)

November through April is the reliable window. The northeast monsoon keeps seas calm, visibility peaks, and the outer islands become accessible. December through February is the sweet spot — cooler air temperatures (still warm by any reasonable standard), minimal rain, and the best chance of whale shark encounters.

Avoid May through September. The southwest monsoon shuts down most dive operations entirely. Seas get rough enough to make the ferry crossings to Havelock genuinely unpleasant, and many smaller guesthouses and dive operators close for the season. Some years the monsoon arrives earlier or lasts longer than expected, so if you're travelling in late April or October, build flexibility into your plans.

How to Get There and Nearby Stops

Flights to Port Blair (Veer Savarkar International Airport, airport code IXZ) depart from Chennai, Kolkata, Delhi, and Bengaluru. The most common routes are through Chennai, with flying times around two hours. Book early — seats sell out during peak season and prices rise sharply in December.

From Port Blair, ferries connect to Havelock, Neil Island, and a handful of other inhabited islands. The government ferry system is affordable and frequent but runs on its own schedule. Private fast ferries (Makruzz and Green Ocean are the two main operators) offer a more reliable and comfortable crossing for a higher fare.

If you're planning a broader India trip, Port Blair connects naturally into a circuit that might include Kolkata or Chennai before or after. For context on how the Andamans fit into India's broader heritage landscape, the UNESCO World Heritage Centre maintains a useful overview of protected natural and cultural sites across the subcontinent — though the Andaman reefs themselves are not currently listed on the UNESCO World Heritage List, a nomination that marine conservationists have been pushing for given the ecological significance of the archipelago.

Travellers combining culture with nature might also consider that the Taj Mahal — India's most visited landmark — is logistically straightforward to include on a longer trip. The Taj Mahal and the Andaman reefs occupy completely different registers of experience, but together they make a compelling argument for the range of what a single country can offer.

For a fuller list of what's available in the city itself, check out more places in Port Blair on the BugBitten site — the Cellular Jail and the Anthropological Museum both merit time on a layover day.

The Not-So-Good Bits

Honest talk. The Andamans take effort to reach and the logistics are not always smooth. Flight connections through mainland Indian hubs can go sideways, ferry schedules change with little notice, and the accommodation scene on Havelock ranges from genuinely good to underwhelming in a way that doesn't always correlate with price. Book accommodation well in advance during peak season, particularly January.

The reef condition closer to Port Blair has declined noticeably due to bleaching events and the cumulative pressure of tourism growth. If you limit yourself to the sites immediately around the capital, you'll come away with a partial picture of what the Andamans are capable of. The best diving requires either doing the liveaboard circuit or committing to at least four or five days on Havelock.

Budget travellers should also know that the Andamans are not cheap by Indian standards. Food and accommodation cost roughly two to three times what you'd pay in comparable mainland destinations. Dive packages are priced closer to Southeast Asian rates than mainland India rates, which catches some people off guard. Factor it into your planning rather than discovering it on arrival.

Permits are required for foreign nationals to visit certain islands, particularly in the North Andaman group. These are not difficult to obtain — most guesthouses and dive operators can assist — but they add a step to the logistics that first-timers sometimes overlook until the last minute.

Final Word from the BugBitten Team

The Andaman reefs reward the traveller who commits. A single day trip from Port Blair will give you a taste; a week on Havelock with two or three days of diving will give you something closer to the real thing; a liveaboard that reaches Barren Island will give you something you'll be talking about for years. The level of investment — time, logistics, money — is higher than many dive destinations in the region, and it's worth being straight about that. But the combination of warm, clear water, low diver traffic, extraordinary sea fans, and the kind of fish life that hasn't been thinned out by decades of overcrowding makes this one of the genuinely significant dive destinations in the Indian Ocean.

Go between November and April. Book your ferry crossing before you land. Bring your own mask and wetsuit if you care about fit. And give yourself more time than you think you'll need — the Andamans tend to expand to fill however many days you allocate.