Comoros is a volcanic archipelago scattered across the Indian Ocean between Madagascar and the coast of Mozambique, where African, Arab, and French influences have layered into a culture unlike anywhere else on earth. Known historically as the Perfume Islands for the ylang-ylang, vanilla, and cloves that scent the tropical air, this is one of the least visited countries in the world, a place where you can hike to the crater of an active volcano, snorkel pristine coral reefs in near-total solitude, and swim alongside humpback whales off the coast of tiny Mohéli. The food tells the same layered story: spiced lobster with vanilla sauce, cassava-leaf stews, and coconut pancakes from street vendors in the capital, Moroni, a city whose narrow medina lanes and whitewashed mosques carry a distinctly Arabian atmosphere.
The best time to visit Comoros is early June through early September, when the dry season brings minimal rainfall, comfortable humidity, and the islands' signature wildlife spectacle: humpback whales arriving off Mohéli to give birth. This window overlaps with the peak tourist months (such as they are in one of the world's least visited countries), but you'll still feel like you have the beaches to yourself. Seas are calm enough for reliable inter-island boat crossings, diving visibility is excellent, and the full-day hike up Mount Karthala is safest in dry conditions. If the whale season is your priority, aim for late July through August, when mothers and newborn calves are most active in the shallow waters. Shoulder months like May and October offer lower accommodation rates and slightly fewer visitors, though you'll trade some weather reliability for the savings.
Fall in Comoros
By September the humpback whales are still in the waters around Mohéli, where about a thousand of them gather each year from mid-July through late October to calve and nurse. This is one of the great wildlife encounters left on the planet: you can snorkel within viewing distance of mothers and their newborns, with almost no other tourists in the water. The coral reefs remain in excellent shape for diving too, with visibility holding strong as the dry season carries through. Highs average 88.9°F (31.6°C) and lows settle around 76.7°F (24.8°C), warm enough that you'll live in lightweight clothing and a swimsuit.
October and November see the whales gradually departing, but the islands stay quiet and uncrowded. This is the slowest stretch for tourism, which means deals on the limited accommodation options. You can explore Moroni's atmospheric medina and the colonnaded Friday Mosque, browse the Volvo Market for locally grown spices and handicrafts, or take a boat to Anjouan to walk through the clove and ylang-ylang plantations that earned Comoros the Perfume Islands nickname. Showers are infrequent, typically zero to one wet day through these months, so trekking conditions remain solid for the full-day ascent of Mount Karthala on Grande Comore. Mid-November brings the year's peak heat, with highs reaching 90.8°F (32.7°C) and lows of 75.4°F (24.1°C), so carry plenty of water if you're hiking. Pack reef-safe sunscreen and a rash guard for snorkeling, as the equatorial sun is fierce even on overcast days.
Winter in Comoros
June through August is the dry heart of the Comorian calendar and the best time to be on the islands. Rainfall drops to near nothing: July sees significant rain just 2% of the time, making it one of the driest stretches anywhere in the tropics. Humidity eases to around 67%, a welcome relief compared to the sticky summer months. Highs average 85.5°F (29.7°C) with lows of 71.2°F (21.8°C), warm but tempered by steady trade winds that make outdoor exploration genuinely pleasant. This is when you'll want to tackle the full-day trek up Mount Karthala, the massive active volcano on Grande Comore whose crater spans nearly a mile across.
The biggest draw arrives in mid-July when humpback whales start appearing in the warm, shallow waters off Mohéli's southern coast. These mothers travel thousands of miles from Antarctic feeding grounds to give birth here, and by August the bay is alive with calves learning to surface and breathe. You can snorkel with them under guided supervision, an experience few places on earth can match. Mohéli Marine Park also protects green sea turtle nesting beaches where you can watch turtles come ashore at night virtually year-round, and the critically endangered Livingstone's fruit bat, with a wingspan reaching 1.4 metres, roosts in the island's subtropical rainforest. Independence Day on July 6 brings parades, traditional dance performances, and communal feasting across all three islands.
This is peak season for Comoros, though that label is relative: the country receives so few visitors that even the busiest months feel uncrowded. Accommodation rates are higher than the rest of the year, and you should book inter-island flights or boat crossings in advance, as schedules are limited and cancellations common. Pack a light windbreaker for breezy boat trips and layering during cooler evenings, and bring your own snorkel gear if possible, as rental options are sparse outside the few eco-lodges on Mohéli.
Spring in Comoros
March through May straddles the transition out of the wet season. March carries the most rainfall of any month in the year, with showers possible roughly one in five days. By May, precipitation tapers considerably, falling to about 16% likelihood, and the air begins to dry out. Highs average 86.7°F (30.4°C) with lows around 73.5°F (23.1°C), warm and tropical throughout. Conditions are manageable, but trails on Mount Karthala can be muddy and slippery in March and April, so the volcano hike is better saved for the dry months unless you're an experienced trekker comfortable with unpredictable conditions.
The upside of spring is price and solitude. Tourism runs fairly slow during these months, and the limited guesthouses and lodges on the islands drop their rates. This is a fine window for cultural immersion: explore the winding lanes of Mutsamudu on Anjouan, where 17th-century houses line the alleys and an old citadel stands guard over the harbor. On Grande Comore, the solidified lava fields from Karthala's past eruptions create a striking black-and-white contrast against the white sand beaches. Diving and snorkeling are still rewarding, particularly around the Coelacanth Marine Park, though visibility isn't quite as sharp as it will be in June and July. Bring a lightweight rain jacket and quick-dry clothes for the occasional afternoon downpour, and remember that Comoros is a predominantly Muslim country where modest dress is appreciated, especially when visiting mosques and villages.
Summer in Comoros
December through February is the hot, humid heart of the wet season. Highs average 88.3°F (31.3°C) and lows sit at 75.1°F (23.9°C), but the real story is humidity, which climbs above 78% in January and February, making the heat feel oppressive. January is one of the wettest months, with significant rain roughly 37% of the time, and February follows closely at 39%. Afternoon storms can be heavy, and the occasional tropical cyclone passes through the Mozambique Channel during this period. Inter-island boat crossings become riskier as seas get rougher, so trips to Mohéli may face delays or cancellations.
That said, this is the second busiest period for tourism, largely driven by French visitors on holiday in December. If you do come during the wet season, you'll find green sea turtles nesting on Mohéli's beaches, the landscape at its most lush and vibrant, and Moroni's street food scene in full swing, with vendors selling mkatra foutra (coconut flatbread) and spiced samosas alongside fresh tropical fruit. The Comorian tradition of elaborate communal weddings, known as the Grand Mariage, tends to pick up during these warmer months, and stumbling upon a multi-day celebration with traditional dances, drumming, and communal feasting is one of the more memorable cultural encounters the islands offer. Pack lightweight, breathable fabrics and waterproof bags for your electronics, as humidity and sudden rain can catch you off guard.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Comoros
Getting to Comoros requires some planning. Prince Said Ibrahim International Airport on Grande Comore handles limited international flights, with connections typically routed through Nairobi, Addis Ababa, Dar es Salaam, or Reunion. Inter-island transport runs via small propeller planes and motorized boats, both of which operate on loose schedules and face frequent cancellations, so build buffer days into your itinerary. Most visitors can obtain a visa on arrival. French is the primary language for business and signage, though Comorian (closely related to Swahili) is spoken everywhere, and basic French phrases will go a long way.
Comoros is a conservative Muslim country: alcohol is not widely available, public displays of affection are frowned upon, and modest clothing that covers shoulders and knees is expected when you're away from the beach. ATMs exist in Moroni and a few larger towns but are unreliable, so carry enough cash in euros or Comorian francs for your full stay. Tap water is not safe to drink; stick to bottled or filtered water. When booking boat crossings between islands, confirm that the vessel has two working motors and life jackets, as safety standards vary widely.