If you want to get the timing of your trip right, a Seychelles weather by month breakdown is the most useful thing to have in front of you. The islands sit just south of the equator, so the swings are far smaller than most travellers expect. Temperatures rarely leave the 24–32°C band at any point in the year.
What changes is not really the heat but the wind and the rain. Two monsoon periods shape the calendar, and knowing which one you’re walking into matters more than the date itself. That single fact explains most of what follows below.
Your trip might hinge on flat water for snorkelling, dry trails for a Morne Blanc hike, or the clearest visibility for a dive. Each month tips the balance differently, and the breakdown below lays it out from January through December so you can match the timing to what actually matters to you.
What Drives the Weather in Seychelles?
The weather in Seychelles runs on two trade-wind seasons rather than the four you might be used to. Getting these straight upfront makes the rest of this Seychelles weather by month guide far easier to read. Everything else is a variation on these two patterns.
The northwest monsoon runs roughly from November to March. It brings warmer, more humid air, the heaviest rainfall, and generally lighter winds with calmer seas. The southeast monsoon takes over from May to October, turning things drier, breezier, and slightly cooler, with choppier water on exposed coasts.
Here’s something worth knowing: the islands sit outside the cyclone belt, so destructive storms are extremely rare. Sea temperatures stay between about 26°C and 30°C all year, and the sun is strong even on cloudy days. So there is no truly “bad” month, only months that suit different plans.
January to March — The Warm Season and Heaviest Rainfall
The opening stretch of any Seychelles weather by month overview is hot, green, and wet. This is the heart of the northwest monsoon, when the islands look their most lush. Rain tends to arrive in short, heavy bursts rather than all-day drizzle.
January & February
January and February are the warmest and wettest months of the year on Mahé. Daytime highs sit around 30°C, humidity is high, and rainfall climbs to roughly 240–280 mm per month spread across many days. The sea stays warm at about 29°C, and winds are usually light.
That said, the rain rarely ruins a day outright. Mornings are often bright before clouds build in the afternoon, and downpours pass quickly. We suggest planning active outings early and saving the pool or spa for the wetter afternoon hours.
March
In the Seychelles weather by month sequence, March keeps the warmth but starts to ease off the rain, with totals dropping to around 170–190 mm. It is a transitional month, sitting between the soggy peak and the calm window that follows. Humidity remains noticeable, though the heaviest downpours become less frequent.
You still get warm, calm seas and plenty of sunshine between showers. For travellers who want green scenery without the full force of January’s rain, March is a sensible compromise.
April & May — The Calm Window
This is where the Seychelles weather by month story gets interesting for beach lovers. April and May fall between the two monsoons, which means the wind drops and the sea flattens out. Many regulars consider this the finest stretch of the year.
April
April is the calmest month in the Seychelles and a top pick for swimming and diving. Winds are at their lowest, the air sits around 30°C, and the sea warms to roughly 30°C. Rainfall still registers near 180 mm, but it tends to come in brief, scattered showers.
Because the water is so still, underwater visibility is excellent for snorkellers and divers. April is often considered one of the best months to visit, thanks to its ideal mix of sunshine, low winds, and warm seas.
May
May holds onto most of April’s calm in any Seychelles weather by month comparison, especially in the first half of the month. Rainfall eases further toward 130–180 mm, and the days stay reliably warm. It remains one of the better months to visit before conditions shift.
By late May, the southeast trade winds begin to make themselves felt. You may notice a freshening breeze and slightly livelier water on the southern and eastern coasts toward month’s end.
What Is Seychelles Weather Like from June to September?
From June to September the weather in Seychelles turns drier, breezier, and a touch cooler, driven by the southeast monsoon. This is the low-rainfall half of the Seychelles weather by month cycle, but it comes with steady wind. Exposed beaches can pick up seaweed, while sheltered bays stay pleasant.
June & July
June and July are the driest and windiest months in this Seychelles weather by month guide, with rainfall dipping to around 65–80 mm. Temperatures are at their lowest for the year, hovering near 27°C, which most visitors find comfortable rather than cool. Steady trade winds blow at roughly 10–20 knots.
The trade-off is sea state. South- and southeast-facing beaches get choppy water and washed-up seaweed, so we’d point you toward north- and west-facing bays for swimming during this period.
Seychelles Weather in August
The Seychelles weather in August marks the peak of the dry, windy season, with strong southeast trades and the coolest sea of the year at about 26°C. Rainfall stays low at roughly 100–115 mm, and skies are often clear and bright. This is prime time for hiking, since the cooler air and dry trails make the inland routes far more enjoyable. Snorkelling on exposed beaches can disappoint in August because of the chop and seaweed. Did you know the wind that frustrates swimmers is exactly what sailors and windsurfers come for? Pick a sheltered bay or head inland, and August rewards you.
Seychelles Weather in September
The Seychelles weather in September sees the wind begin to ease and the sea start to settle, making it a strong transitional month. Rainfall remains modest at around 120–155 mm, and temperatures tick up slightly as the dry season loosens its grip. The lively conditions of August fade week by week.
For travellers scanning the Seychelles weather by month for value, September is an underrated choice with decent conditions and fewer crowds. The breeze still cools the afternoons, but the rough seas of midwinter are mostly behind you.
October to December — Transition Into the Wet Season
The closing chapter of this Seychelles weather by month guide swings back toward warmth and rain. October opens with a brief calm window before the northwest monsoon returns in force. Temperatures rise steadily through to December.
October
October is the second calm window in the Seychelles weather by month calendar and a favourite among divers. With the southeast winds gone and the northwest pattern not yet established, the sea turns glassy and underwater visibility peaks. Sea temperatures climb to about 28°C, and rainfall sits near 130–190 mm.
If your priority is diving or snorkelling, October is arguably the best month of all. The combination of clear water and gentle conditions is hard to beat.
November & December
November and December bring the return of the northwest monsoon, so rain becomes more frequent though often short-lived. November totals climb toward 210–220 mm, while December rises to around 270–300 mm as the wet season sets in. Temperatures and humidity both edge upward.
These months still deliver plenty of sunshine between showers, and the festive-season sea stays warm and calm. Just pack light rain gear and keep your plans flexible around the afternoon downpours.
What Is the Best Time to Visit Seychelles Based on Weather?
The best time to visit Seychelles based on the weather is April, May, or October, when the islands sit between their two monsoons. These windows deliver the lowest winds, the calmest seas, and the clearest underwater visibility of the year. April edges ahead for all-round beach conditions, while October is the standout for diving.
Still, the full Seychelles weather by month picture doesn’t write off the rest of the calendar. The June-to-September stretch suits hikers and anyone who prefers cooler, drier air, and even the wetter months bring warm seas and short, passing showers. Match the month to your priorities, and the weather will rarely let you down.
Which Month Works Best? A Seychelles Weather by Month Summary
To pull this Seychelles weather by month guide together, here’s a quick verdict on each month so you can scan and decide at a glance. Use it as a shortlist, then read the section above for the detail.
- January–February: Warmest and wettest; lush scenery, short heavy showers, warm calm sea.
- March: Easing rain, still warm and humid — a green-season compromise.
- April: Calmest month; best all-round for swimming and diving.
- May: Calm early on; southeast wind arrives late in the month.
- June–July: Driest and windiest; cooler air, seaweed on exposed beaches.
- August: Peak dry-and-windy season; ideal for hiking, less so for exposed-beach snorkelling.
- September: Wind easing, seas settling — an underrated, quieter month.
- October: Second calm window; top choice for divers thanks to peak visibility.
- November–December: Northwest monsoon returns; warmer, more frequent but brief rain.
Pick Your Month and Start Planning
Now that you know what each month brings, the only real decision is what kind of trip you want. Calm seas and warm water point you toward April or October. Dry trails and cooler air make August and September the hiking months. Even the wet season from January to March delivers warm swims between short downpours, so nothing is off the table.
If you want a base on Mahé that puts the beach, the airport, and the rest of the island within easy reach, STORY Seychelles on Beau Vallon is worth a serious look. The beachfront location works in every season, and the sheltered northwest coast holds up well even when the southeast winds pick up between June and September.
Whatever month you land on, Seychelles rarely disappoints. Use this Seychelles weather by month guide as your starting point, book the dates that match your priorities, and let the island do the rest.
