Monthly weather forecast and climate

Flag of Seychelles
Flag of Seychelles

The climate of Seychelles

Seychelles has a tropical rainforest climate (Köppen climate classification Af); It is a humid but equable climate, with little temperature variations throughout the year. Seychelles is an island country in the Indian Ocean, on the eastern side of the Somali Sea. The islands lie approximately 932 miles to the east of Africa. Madagascar and Mauritius are in the south, and Maldives and Chagos lie towards the east of Seychelles. Mahe is the largest island, 835 miles away from Somalia's capital, Mogadishu. The vast waters of the Indian Ocean, southeast trade winds, and proximity to the equator influence the climate. The days and nights are of equal duration throughout the year.

Seychelles is an archipelago of 115 islands, situated just 4°south of the equator. The landmass of only 175 square miles consists of two distinct regions. The Inner Islands are made from granitic rock and are the world's oldest oceanic islands. Mahe, Praslin Island, Silhouette Island, and La Digue are the most important granite islands. The rocky islands have a narrow coastal strip and a range of hills in the center. The Outer Islands are coralline and mostly flat, with coral reefs at different formation stages. Southern Coral, Amirante, Alphonse, Aldabra, and Farquhar, are the five main groups in the outer islands that have no freshwater sources. Denis and Bird are two coral sand cays that lie to the north of the Inner Islands. Two coral reefs, Coetivy and Platte, are in the south of the granitic islands. Morne Seychellois is the highest point at 905 meters. The coastline of Seychelles is 306 miles.

Summers are hot and humid in Seychelles. The hot season lasts from December to April in the southern hemisphere, which also brings heavy rainfall. The average temperatures vary from 23.9°C (75°F) to 30°C (86°F) in the year, and the hottest months are March and April. Temperature extremes are rare and seldom cross 32.8°C (91°F) or drop below 22.2°C (72°F). The northwest monsoon prevails from November to March to bring a wet and muggy season. The coldest months are from June to August. The southeast trade winds regularly blow from May to November in the dry season to create pleasant conditions. The average daily wind speeds remain below 32.2km/h (20mph), with gusts in August that go up to 56.3km/h (35mph). High wind speeds are rare due to the location of most of the islands outside the cyclonic belt. Afternoon thunderstorms frequently occur in the wet season, and night precipitation is standard in the dry season. The islands lie scattered over a wide area and have small climatic differences within a generally homogeneous climate.

The rainfall in the southern islands of Assumption and Aldabra in Seychelles varies from 863.6mm (34") to 965.2mm (38") annually. Victoria, the capital on the island of Mahe, registers 2286mm (90"), while the mountain slopes record 3606.8mm (142"). Mahe is the wettest of all the islands, and the northern islands are substantially wetter than the others. The precipitation occurs throughout the year, as the country registers at least 150 days annually. December and January are the wettest months, and the rainy season lasts from October to April. The annual average relative humidity is high at 80%, with the lowest of 78% in September and the highest of 82% in January. The sunshine registers an ample 2527 hours in the year. The sunniest month is May, with 253 hours of sunlight, and the darkest is January with 153 hours. The sunlight is strong, with a high ultraviolet index between 10 and 12 throughout the year. The average seawater temperatures remain in the warm zone of 26.1°C (79°F) to 30°C (86°F), which is comfortable for swimming all year round.

The highest temperature on record for Victoria, Seychelles is 37.2°C (99°F), while the record for the lowest temperature is 16.1°C (61°F).

The best time to visit Seychelles

The best time to visit Seychelles is from June to August when the temperatures and humidity levels keep the conditions comfortable. Temperatures are slightly lower between June to August and rarely cross 31.1°C (88°F). The lowest precipitation occurs in the dry season period, and accompanied by bright sunshine makes it is an excellent time for beach holidays. Afternoon showers usually give way to light showers at night, which keeps the days mostly clear. Wind speeds pick up in August and make the seawaters choppy to the thrill of surfers. Beaches in the northwest are preferable during windy conditions. October also has fair weather and lies outside the cyclone season.

The worst time to visit Seychelles

The worst time to visit Seychelles is from December to January in the humid and wet season. The humidity levels are at the highest of the year and raise the heat index. The highest precipitation period keeps the daily sunshine to 5 hours. The skies are mostly cloudy, and the muggy conditions induce much sweat. Heavy rainfall curtails time on the beaches. The wet season is also prone to afternoon thundershowers. Frequent showers pose challenges in swimming, diving, and other water activities, although the seawater temperatures are comfortable. Nights are warm and humid.

Weather hazards

Seychelles is susceptible to weather hazards, such as floods, droughts, cyclones, and tsunamis. The northern islands, such as Mahe, Praslin, and La Digue, face fewer cyclonic events due to proximity to the equator. The southernmost islands from the Outer Island group, such as Aldabra and Farquhar, are susceptible to cyclones. Tropical storms, such as Ikonjo in May 1990 and Felleng in January 2013, caused substantial damage to Seychelles. Cyclones bring damaging winds and heavy rain. The monsoon brings rainstorms and floods in the low-lying regions. Tsunamis and global warming pose a risk to the low-lying terrain. Coral bleaching damaged the reef ecosystem in 1998.

Weather in January

January is the wettest month of the year in Seychelles, with 254mm (10") to 381mm (15") of rainfall in many places. The relative humidity between 75% and 95% keeps the conditions muggy and induces much sweat. The average temperatures in Victoria range between 23.9°C (75°F) and 30°C (86°F), with little variations in the rest of the country. Weather in January »

Weather in February

February is wet and humid in Seychelles, with the average temperatures in the zone of 25°C (77°F) and 30°C (86°F). The ample precipitation of 203.2mm (8") to 254mm (10") makes it challenging to explore the Inner Islands. The southernmost islands receive less than 101.6mm (4") of rain, but the chance of a wet day is between 35% and 45% everywhere. The daily sunshine improves to 6 hours, and the days and nights are of equal duration. Weather in February »

Weather in March

March sees a rise in temperatures in the wet season in Seychelles. The average temperatures in Mahe are in the hot range of 25°C (77°F) to 31.1°C (88°F). The northwest monsoon continues the wet season, but the precipitation is significantly lower than the early part of the season. Victoria registers 200.7mm (7.9") of rain in 15 wet days in the month. Weather in March »

Weather in April

April is usually the hottest month of the year in Seychelles, with the average temperatures in the range of 25°C (77°F) to 31.1°C (88°F). The mercury column climbs to 32.2°C (90°F) on April 6, the hottest day of the year. The average precipitation in Victoria is 177.8mm (7") but is short of 127mm (5") in most of the islands. Weather in April »

Weather in May

May is the sunniest month of the year in Seychelles, with 253 hours of bright sunshine. The southeast trade winds reach the islands and begin to cool the atmosphere. The transition to the dry season yields an average of 101.6mm (4") to 152.4mm (6") of rainfall. Weather in May »

Weather in June

June sees a slight drop in temperatures in Seychelles, registering in the 25°C (77°F) to 28.9°C (84°F) range. The conditions are dry and sunny, with bright sunshine of 8 hours every day. The skies are clear for 37% of the time, and the daylight lasts for slightly less than 12 hours. The average relative humidity drops to 79%, and night precipitation supersedes afternoon showers. Weather in June »

Weather in July

July is the coldest month of the year in Seychelles, with the average temperatures in the 23.9°C (75°F) to 27.8°C (82°F) range. Even the wettest islands of Mahe, Praslin, and La Digue see a significant decrease in precipitation. Weather in July »

Weather in August

August is a dry and sunny month in Seychelles, with comfortable weather. Temperatures are usually in the range of 23.9°C (75°F) to 27.8°C (82°F), with warm days and mild nights. The average precipitation ranges between 76.2mm (3") and 127mm (5"), with less than 16 wet days in the month. Weather in August »

Weather in September

September registers the least average monthly humidity of 79% in Seychelles. The conditions are comfortable in the dry season, with ample sunshine and less rain. The precipitation is in the range of 101.6mm (4") to 152.4mm (6") in the Inner Islands and 76.2mm (3") to 127mm (5") in the Outer Islands. The average temperatures remain in the warm 23.9°C (75°F) to 28.9°C (84°F) range, with daily highs rarely above 30°C (86°F). Weather in September »

Weather in October

October begins the reign of the wet season in Seychelles, with a significant increase in precipitation. Much of the country receives above 180.3mm (7.1") of precipitation, and the northernmost islands near the equator are the wettest. Weather in October »

Weather in November

November lies in the wet season of Seychelles, with humid and rainy conditions. The average temperatures are in the 23.9°C (75°F) to 30°C (86°F) range in much of the country. The increase in humidity is evident even in the nights, which remain warm and cloudy. Weather in November »

Weather in December

December is wet and humid in Seychelles, as the rainy season gathers momentum. The average temperatures remain in the zone of 23.9°C (75°F) to 30°C (86°F), with a significant rise in the heat index. The average humidity is at the highest of the year at 82%. Weather in December »

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