A Morning at the Comoros Islands
When Jess from our BugBitten team dropped anchor off Mohéli's southern coast just after dawn, the first thing she noticed was the silence. Not the anxious silence of a place that has something to hide, but the easy, unhurried quiet of somewhere that simply hasn't been found yet — or rather, somewhere that has been found only by the people who were prepared to work hard enough to get there. The anchor chain ran down through water so clear she could watch it settle into pale sand eight metres below, threading between coral heads that glowed faintly in the early light. A hawksbill turtle surfaced two boat-lengths off the bow, took a long look at her, and dived again without apparent urgency. That was the whole morning, basically: coffee, a turtle, and an ocean that seemed in no particular hurry to show off.
Getting to the Comoros on a sailboat is not a casual weekend decision. The archipelago sits in the northern Mozambique Channel between Madagascar to the east and the African mainland to the west, a cluster of volcanic islands that rise sharply from deep water and offer almost no sailing infrastructure in return for what they give you. Jess had spent three weeks planning the approach from Mayotte, checking weather windows obsessively, and stocking the boat with enough provisions to last a fortnight without resupply. She had also packed her patience, which, as it turned out, was the most-used item on board.
What she brought back, apart from a hard drive full of photographs and a jar of ylang-ylang essential oil bought from a woman at a roadside stall near Fomboni, was the conviction that these islands represent something genuinely rare in contemporary sailing: a place where the number of visiting boats in a season can still be counted on two hands, where the coral has not been loved to death, and where the trade wind crossing between islands still feels like a passage rather than a commute.
What Makes This Spot Worth Your Time
The Comoros Islands — Grande Comore, Mohéli and Anjouan, plus the French-administered island of Mayotte — are volcanic in origin, which means dramatic topography both above and below the waterline. Karthala, the active stratovolcano that dominates Grande Comore, is one of the largest active volcanoes in the world by crater diameter, and its presence shapes everything about the island: the soil is rich and black, the interior dense with forest, and the coastline drops steeply into water that quickly reaches abyssal depths.
For sailors, that bathymetry matters enormously. There is very little continental shelf to speak of, which means anchorages are few and require careful placement, but it also means the water clarity is extraordinary. In the right spot off Mohéli you are anchored in eight metres of sand with a reef wall that drops to several hundred metres thirty fin-kicks away. The diversity of marine life reflects that depth gradient: the shallow reefs carry healthy hard coral and the reef fish you'd expect in a functioning tropical marine system, but the blue water close in holds pelagics — tuna, wahoo, and occasionally the kind of thing you weren't expecting.
The most compelling single fact about Mohéli's waters is also the one that sounds most like something invented for a tourism brochure but happens to be completely true: this is the region where the coelacanth was rediscovered in living populations. The coelacanth, a lobe-finned fish that most biologists had assumed extinct for sixty-five million years, turned up alive in a Comoros fisherman's catch in 1938, and subsequent research confirmed that the deep submarine canyons off Mohéli and Anjouan carry resident populations. You are not going to see one while snorkelling — they are deep-water, nocturnal animals — but knowing they are down there somewhere beneath your keel changes the quality of looking over the side at night.
The Nioumachoua marine park on Mohéli's southern coast is the most visited part of the archipelago by whatever modest standard of visitation applies here, and it is genuinely worth the attention. Sea turtle nesting beaches, intact coral, and the absence of the anchor-scar moonscaping you find in more popular cruising grounds make it feel like the Indian Ocean at its least-damaged.
How the Area Feels
Ashore, the Comoros have a cultural texture that is unlike anywhere else in the Indian Ocean, which is saying something given how varied that ocean is. The islands were settled by Bantu-speaking Africans, Arab traders, and later Shirazi Persians, and the Swahili-Arab-African blend that resulted is evident in everything from the carved wooden doors of the older medinas to the call to prayer that organises the day, to the ylang-ylang and clove that scent the hillside plantations above the coast.
Moroni, the capital on Grande Comore, has a medina that rewards a slow afternoon on foot. The old port area, with its carved doorways and the Friday Mosque on the waterfront, has an architectural coherence that the newer parts of town lack. The pace is unhurried to a degree that initially registers as lethargy but reveals itself fairly quickly as a considered relationship with time. People will stop to help you with directions, share tea if the context permits, and engage in conversation with genuine curiosity, particularly if you make any effort with French or the Comorian Arabic dialect called Shikomori. English gets you a polite smile and not much else.
The bureaucracy of check-in deserves its own paragraph. Clearing in at Moroni involves multiple offices, multiple forms, and a timetable that is best described as approximate. Carry a folder of photocopied documents — passports, ship's papers, crew list, insurance, zarpe from your last port — in quantities that feel absurdly excessive, because they are not. The officials are not hostile; they are processing paperwork in a system with limited resources, and patience on your part tends to be reciprocated with goodwill. Budget a full day and treat it as the price of admission.
For sailors who have cruised the East Africa (Lamu Archipelago), some of this cultural landscape will feel familiar — the Swahili coastal culture, the coral-stone architecture, the rhythm of a place structured around tides and trade winds rather than tourism infrastructure. The Comoros feels like a version of that world that is less visited and, in places, less changed.
What to Actually Do Here
Sailing the Inter-Island Passages
The three main islands are separated by passages of between thirty and sixty nautical miles, which in the southeast trades of May through September means brisk reaching in fifteen to twenty-five knots. The trade wind is mostly reliable during this period, blowing steadily enough to make the passages fast and comfortable on a well-found boat. The caveat is the chop: the channel between islands can funnel and accelerate the wind in a way that produces short, steep seas that are more tiring than dangerous but that make life aboard unpleasant if you are already tired from a long passage.
Day sailing between islands is strongly preferred over overnight passages. The charts of the Comoros are, to use a polite term, approximate. Lit marks exist in theory more than in practice, and the volcanic coastlines are steep enough that errors have consequences. Leave early, arrive in daylight, and anchor before dark.
Snorkelling and Diving
Mohéli's marine park is the standout diving and snorkelling destination, with the turtle beaches near Nioumachoua offering reliable wildlife encounters even for snorkellers. Anchoring in five to eight metres over sand clear of the coral gives you immediate access to reef that has not been worn down by diver traffic. There is no dive operation in the conventional sense — no boat, no guided dives, no equipment rental — so you need to arrive self-sufficient with your own gear and your own divemaster certification if you plan to go below recreational snorkelling depth.
Anjouan offers different diving character: steeper reef walls and stronger currents that reward experienced divers. The fisheries pressure on Anjouan is higher than Mohéli, which is reflected in the reef fish populations, but the structural coral and the macro life remain impressive.
Exploring Ashore
Ylang-ylang distilleries on Anjouan and Grande Comore will sometimes accept visitors, and the process of watching the flowers processed into the essential oil used in perfumery is genuinely interesting — this is one of the world's largest ylang-ylang producers and the smell of the distillation is remarkable. Karthala's crater, accessible from Moroni by a half-day hike, is for the reasonably fit but not technically demanding. The views from the rim, assuming the cloud cooperates, are extensive.
The UNESCO World Heritage Centre documents cultural and natural heritage across the Indian Ocean region, and while the Comoros islands themselves do not currently hold World Heritage listing, the context it provides for the region's broader significance is useful background reading before you arrive. The marine ecosystems and the biodiversity of the Mozambique Channel have been discussed in international conservation circles for years — checking the UNESCO World Heritage List gives you a sense of what comparable sites look like and how the Comoros fits into the wider picture.
When to Go (and When Not To)
The answer is May through September and nothing else requires much discussion. The southeast trades blow consistently during this period, the passages are manageable, and the weather is dry on the leeward coasts. The visibility underwater is at its best, the sea state on the anchorages is generally settled, and the temperature — mid to high twenties Celsius — is comfortable for both sailing and going ashore.
October through April is cyclone season in the Mozambique Channel. This does not mean a cyclone will necessarily arrive, but it means the risk is real, the weather patterns are erratic, the trades are gone or reversed, and the humidity climbs to levels that make everything harder. The anchorages that are sheltered in the southeast trades can become exposed and dangerous when wind comes from other quarters. Do not plan a sailing visit outside the May-September window unless you have specific local knowledge and a very good reason.
Within the sailing season, June through August represents the peak of the trades, which means the fastest passages but also the most pronounced channel chop. May and September offer slightly softer conditions — the trades are establishing or fading — which can make the inter-island passages more comfortable at the cost of occasionally needing to motor into a lighter breeze.
Sailors who have also cruised the Cocos (Keeling) Atoll in the eastern Indian Ocean will recognise the general principle: trade wind sailing works on the trade winds' schedule, not yours, and the windows the season offers are genuinely generous if you use them correctly.
How to Get There and Nearby Stops
There is no established charter base in the Comoros. This is the fundamental logistical reality that shapes everything else. You arrive either on your own yacht — most commonly on a longer Indian Ocean passage — or aboard a liveaboard vessel arranged through a specialist operator out of Mayotte or Réunion, both of which have the infrastructure to support extended offshore passages in a way that the Comoros itself currently does not.
For passage-makers, the most natural approach is from Mayotte to the northwest or from Madagascar to the east. Sailors heading northward from South Africa along the Mozambique Channel route sometimes include the Comoros as a stop between the northern Mozambique coast and the East African mainland. The approach to Moroni from the south is straightforward in good visibility and daylight; the approach to Mohéli requires careful chart work and slow going along the reef-fringed southern coast.
Provisioning
Arrive well stocked. Moroni has markets that can supplement your supplies with fresh produce, and you will find bread, fruit and vegetables with patience. Beyond the basics — cooking gas, diesel, specific provisions you depend on, any hardware or spare parts — the options are limited. Fuel is available in Moroni but the logistics of getting it to the boat may involve jerry cans and ingenuity. Water is available but should be treated. Plan your provisioning window for Moroni before heading south to Mohéli, as Fomboni on Mohéli is more limited still.
Nearby Stops
Mayotte is the most natural staging point in both directions — it has a well-protected lagoon, fuel, provisioning and a functioning check-in system. Madagascar's northwestern coast and the Nosy Be area are reachable from the Comoros in a one- or two-day passage and offer a completely different character. Explore more places in Indian Ocean for a broader picture of what the region offers across different sailing styles and experience levels.
The Not-So-Good Bits
This should be frank. The Comoros are not for everyone, and the list of reasons someone might choose elsewhere is real and not embarrassing.
The infrastructure deficit is genuine. There are no marinas. There are no dedicated mooring fields. There are no dive operators with boats and rental gear. There are no chandleries. If something breaks on the boat in Mohéli, the solution involves either what you brought with you or a fabrication job by a local welder who may or may not have what you need. Experienced bluewater sailors with well-found, well-spared boats handle this as a matter of course. Less experienced sailors or those on older, less reliable yachts should think carefully about whether this is the right destination for their current capability.
The charts are a genuine safety issue, not a minor inconvenience. This is not an area for sailing in reduced visibility or at night, and the navigation demands respect and conservative decision-making throughout. Errors that would be recoverable elsewhere may not be recoverable here.
The political situation on the islands has been periodically unstable, and the relationship between the three main islands and the French administration of Mayotte remains complicated. This doesn't manifest as danger for visiting sailors in normal circumstances, but it does mean that services and permissions can be subject to disruption that local knowledge would have predicted and visiting sailors cannot easily anticipate.
Communications are limited. Connectivity for weather routing, for contacting home, or for getting outside help if needed is inconsistent. Bring a satellite communicator and treat it as essential rather than optional.
Final Word from the BugBitten Team
The Comoros ask something of you before they give anything back. They ask for preparation, experience, patience with bureaucracy, and a genuine willingness to operate without the safety net of a functioning tourism infrastructure. In return, they offer something that is becoming genuinely hard to find in the Indian Ocean: the experience of arriving somewhere that hasn't been smoothed down for visitors, where the reef is intact because the boats haven't found it in volume, and where the cultural encounter ashore is on terms that are the locals' rather than the industry's.
Jess came back from her three weeks in the islands quieter than she left — which, if you know Jess, is the strongest possible endorsement. She talked about the turtle off Mohéli, the ylang-ylang smell that got into her sailing clothes and stayed there for a week, the morning in Moroni when a man she'd never met invited her to share breakfast on the basis that she'd stopped to look at the old mosque for longer than most passing foreigners do. None of these things are guaranteed. They are the kind of thing that happens when you go somewhere slowly enough to let it happen.
The BugBitten team won't pretend this is an easy destination or a comfortable one in the conventional sense. It is, however, an honest one — a place that is exactly what it looks like on the chart: steep-sided, deep-watered, not especially interested in whether you approve of it or not. If you've done the bluewater miles, sorted the provisioning, and can navigate by chart and compass when the electronics let you down, there are very few places in the Indian Ocean that will leave you with the same quality of story to tell.
