The climate of Seychelles is hot and humid with an average yearly temperature of 84°F (29°C), and average sea temperature rarely dropping below 81°F (27°C). The cooler season in Seychelles is during the southeast monsoon season (May to September) and the warmer season is during the northwest monsoon (November to March). April and October are “changeover months” between the two monsoons, when the wind is variable. The northwest monsoon season tends to be warmer with more rain, while the southeast monsoon season is usually drier and cooler.
A larger amount of the annual rainfall falls during the months of December to February compared to other months. The average number of rainy days in December, January and February are 18, 17 and 11 days respectively. It is also fairly cloudy at times during those months and therefore less sunshine. The weather is hottest from December to April, and the humidity is high often 80% or higher.