Best Time to Visit the Seychelles Outer Islands

The best time to visit the Seychelles Outer Islands is during the two transition seasons, April to May and October to November, when the trade winds ease, the sea turns glassy and reef visibility is at its best. December to March is warmer, wetter and still calm on most shores; June to September is cooler, breezier and drier, with rougher water on exposed coasts. The islands are warm all year, so the real question is which month suits what you want to do there.

This guide is the timing companion to our Seychelles Outer Islands journey, which moves from the granite islands of Mahé, Praslin and La Digue to the remote coral islands reached by light aircraft. If you are still choosing between islands, our journal's ten best places to go in the Seychelles compares them one by one. Here the focus is the calendar: how the winds shape each month, when diving, fishing and wildlife peak, and how to match an island to the season.

How the Seychelles Year Works

The Seychelles sits just south of the Equator in the western Indian Ocean, so the temperature barely moves. The national tourism board notes that it seldom drops below 24°C (75°F) or rises above 32°C (90°F), and that all but the remotest southern islands lie well outside the cyclone belt. What changes through the year is the wind, and with it the sea. The Seychelles Meteorological Authority's climate guide divides the year into two monsoon seasons separated by two shorter transitions.

The Northwest Monsoon: December to March

From around December to March, winds blow from the northwest. This is the warmest, most humid stretch of the year and the main rainy season, with rainfall usually peaking in January. Rain tends to come as short tropical showers, often in the early afternoon, and winds are generally light, so conditions at sea are often pleasant.

The First Transition: April and Early May

April is the monsoon reversal. Winds turn light and variable, and the meteorological authority describes sea conditions as about as pleasant as they get, ideal for fishing. It is also the hottest month, with afternoon highs that can reach 32°C. By May the southeast trades are setting in, but the sea is not yet rough, and May is typically the sunniest part of the year. For divers, snorkellers and anyone flying out to a small coral island, this is the window we recommend most often.

The Southeast Trades: June to September

From June to September, the southeast trade winds bring drier, slightly cooler weather and stronger winds, in the region of 10 to 20 knots according to the tourism board, with choppier seas, particularly on southeast-facing coasts. It is a lovely season for walking, cycling and cooler nights, but less reliable for boat days on exposed water and for sight-fishing on the flats.

The Second Transition: October and November

In October the trades weaken considerably, and the meteorological authority records it as the month with the most dry days. By November the winds drop and swing to the west, the sea is calm again, and the rains begin to build as the northwest monsoon becomes established, typically by mid to late November. This is the second sweet spot of the year.

Month by Month

January and February

Hot, humid and the wettest part of the year, with showers that usually clear quickly and generally calm seas. Good for couples who don't mind the odd downpour and anyone who wants the islands at their greenest.

March

The rains ease and the northwest monsoon weakens, so conditions at sea become more pleasant. It is a strong month for spring-break families, especially as the Easter window of 2027 falls at the end of the month, with Easter Sunday on March 28. Sooty terns start to gather over Bird Island ahead of their breeding season.

April

Light winds, calm water and excellent visibility: our first choice for diving, snorkelling and flats fishing. It is hot, so plan midday around shade and long lunches.

May

The trades arrive but the sea is still kind, and May is usually the sunniest month of the year. Ideal for couples and honeymooners.

June, July and August

Cooler, breezier and drier, with rougher seas on exposed coasts. The trade winds keep the heat manageable for children on a summer-holiday trip; on the coral islands, plan around sheltered lagoons rather than open-water boat days.

September

Still under the trades, often easing by month's end. Whale sharks are traditionally sighted off Mahé's west coast between August and November, although numbers vary greatly from year to year.

October

The trades weaken, the sea settles and the days are mostly dry. A superb month for diving and boat days, with the flats fishing and hawksbill nesting seasons under way.

November

Calm seas, light westerly winds and the first of the rains. A rewarding month for divers and anglers, and for US families travelling over Thanksgiving, which falls on November 25 in 2027.

December

Warm, humid days with afternoon showers. The Christmas and New Year weeks are the most heavily booked of the year, so secure them many months ahead.

The Best Time for What You Want to Do

Diving and Snorkelling

April, May, October and November usually bring the calmest seas and clearest water, which is why our Seychelles Outer Islands journey is timed around them. The northwest monsoon months are often calm too, while the southeast trades can make exposed reefs choppy. Turtles, rays and reef sharks are common sightings.

Fly-Fishing the Alphonse Flats

The flats of the Alphonse group, including the vast lagoon of St. François Atoll, are known among saltwater fly-fishers for bonefish, giant trevally and permit, fished catch-and-release with expert guides. Operators run their main flats season from roughly September or October through May, when the trades have eased, with a reduced programme during the windier southeast season. Angler numbers on the atoll are capped each day, so the transition months book up first.

Turtles and Giant Tortoises

Hawksbill turtles nest mainly on the granite islands and the Amirantes, typically from September to March, with the peak in November and December, according to Nature Seychelles. Unusually, Seychelles hawksbills often nest in daylight. Green turtles nest mainly on the remote outer islands and can nest in any month. Giant tortoises can be seen all year, from Curieuse off Praslin to the tortoise sanctuary on Desroches, where juvenile Aldabra tortoises are raised before release.

Seabirds

Bird Island's sooty tern colony is one of the great wildlife sights of the Indian Ocean. According to the island's own guidance, the terns gather overhead in March, land in the colony through April and May, lay their eggs in June, and the last of the young have fledged by the end of October.

Whale Sharks

The Marine Conservation Society Seychelles notes that whale sharks usually gather along Mahé's west coast between August and November, and runs its monitoring season and small eco-tours from August 1 to October 31. Sightings rise and fall from year to year, so we treat an encounter as a bonus rather than a reason to choose dates.

Who the Outer Islands Suit, and at What Age

On several of the Outer Islands a single lodge is the only place to stay. That makes them extraordinary for the right traveller and the wrong choice for anyone who wants nightlife or a choice of restaurants.

Inner Islands, Outer Islands and Private Islands

The Inner Islands sit on the shallow Seychelles Bank around Mahé. Most are granite, mountainous and green, and they include Praslin, La Digue and several private islands: Fregate, North Island, Félicité and Bird Island, a coral cay on the bank's northern edge. The Outer Islands lie far beyond the bank. They are flat coral islands and atolls, including the Amirantes group with Desroches, and the Alphonse group farther out, reached only by small aircraft from Mahé. Aldabra Atoll, a UNESCO World Heritage Site more than a thousand kilometres from Mahé, is strictly protected and is generally reached only on permitted expedition voyages.

This matters for timing. The granite islands almost always have a sheltered beach somewhere; on a small, flat coral island the lagoon and reef passes are the whole story, so the transition months matter more out there.

A Sample Eight-Night Journey, Timed for the Transition Months

Days 1 and 2: Mahé

Arrive at Seychelles International Airport and keep the first day protected: a private transfer, a swim and a Creole dinner. On day two, take a private boat to Sainte Anne Marine National Park, leaving early to beat the mid-morning boats.

Days 3 and 4: Praslin and La Digue

A short flight or ferry to Praslin, then an early private walk in the Vallée de Mai, the UNESCO-listed palm forest where the coco de mer grows wild. The next day, cross to La Digue and cycle to Anse Source d'Argent, timed for low tide and soft light. Families can add a private boat to Curieuse to meet the giant tortoises.

Days 5 to 8: An Outer Island

Fly from Mahé to a coral island for four nights. Days follow the tide: a morning snorkel or dive, an afternoon cycle, a turtle walk with the conservation team, and sunsets on an empty beach.

Day 9: Departure

Fly back to Mahé in the morning to connect with your international flight. If the timings do not line up, add a final night on Mahé rather than risk a tight connection. For a private arrival or departure, ask us about Haute Jets.

Where to Stay, Season by Season

Mahé

Four Seasons Resort Seychelles is one of the most reliable choices for travellers who care about views, villa privacy and polished service, and it suits a first or last night as well as a longer stay. Banyan Tree Seychelles suits couples who want a more romantic, cocooned atmosphere. Families who want more space often prefer a staffed private villa near the sheltered bay at Anse Royale, which we arrange with a chef and a driver.

Praslin

Constance Lemuria is our first choice on Praslin for space, consistent service and privacy. For longer stays or larger families, a staffed villa on the island can be the better option.

Desroches Island

Four Seasons Resort Seychelles at Desroches Island is the only resort on the island, a 35-minute scheduled flight from Mahé on a private runway beside the resort. It is our first recommendation for families and for couples who want a remote island with full resort services: private villas, complimentary bicycles, a marine biologist who leads turtle walks, a tortoise sanctuary and a doctor on call at the island clinic. It works in every season; in the southeast trades we plan days around the sheltered side of the island.

The Alphonse Group

The Alphonse group has a single small lodge built around fly-fishing, diving and the St. François lagoon. Space is very limited and is confirmed through relationships for your dates; we place anglers and adventurous couples there in the transition months.

Private Islands of the Inner Seychelles

For travellers who want a private island without the long flight, the inner bank has several of the most exclusive stays in the Indian Ocean. Fregate Island combines privacy with a celebrated conservation story, including more than 3,500 Aldabra giant tortoises; our guide to Fregate Island covers it in depth. North Island is the most private of all, chosen when discretion is the principal brief. Six Senses Zil Pasyon on Félicité suits wellness-led couples, and Bird Island is a simple, nature-first lodge for birders, best between April and October, when the sooty terns are in residence.

When to Book

For the transition months, the Christmas and New Year weeks and Easter, we suggest booking nine to twelve months ahead, because the outer islands have very few rooms and the light aircraft very few seats. Otherwise, four to six months is often enough. Secure the island flights before you finalise international tickets.

The Seychelles is warm every day of the year. What you are really choosing is the sea, and in April, May, October and November it is at its kindest.

Plan the Seychelles the Haute Black Way

Haute Black is the private travel service of Haute Living, with Virtuoso-affiliated benefits on qualifying stays and one advisor accountable for every flight, boat and guide. Begin with our Seychelles Outer Islands journey, compare it with the Maldives private island escape and our guide to the best time to visit the Maldives, or pair the islands with Africa through our Cape Town, Winelands and safari journey and the Kenya migration season. Families will find more ideas on our family travel page.

When you are ready, plan your journey with us. Share your dates, your party and what you want from the water, and an advisor will tell you honestly which island and which month will deliver it.