The climate of Mayotte is tropical, with a hot, humid and rainy season from December to April, when the north-west monsoon prevails, and a relatively cool, dry and sunny season from June to October, when the south-east trade winds prevail, while May and November can be considered as transitional months.
Mayotte is an archipelago consisting of two main islands, Grande-Terre (or Maore) and Petite-Terre (or Pamanzi), plus some smaller islets. The archipelago is an overseas department of France and is located in the Indian Ocean, at a latitude of nearly 13 degrees south.
The average daily temperature ranges between 27 °C (81 °F) in the warmest period (January-April) to 23/24 °C (73/75 °F) in the coolest period (June-September). From June to September, the temperature never exceeds 32 °C (90 °F), while from November to March, it can sometimes reach 34/35 °C (93/95 °F), morevoer, high humidity in this period makes the heat uncomfortable.
Here are the average temperatures on the main island.
Mayotte - Average temperatures
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Min (°C)242424242322212121222324
Max (°C)303030302827262628293131
Min (°F)757575757372707070727375
Max (°F)868686868281797982848888

Total annual rainfall is not very high, and amounts to 1,200 millimeters (47 inches) on the small island of Pamanzi and 1,400 mm (55 in) on the main island, where more than 100 mm (4 in) fall from December to April; the rainiest month is January, when the rains are definitely abundant.
Here is the average precipitation.
Mayotte - Average precipitation
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Prec.(mm)310245190125703540303065901851425
Prec.(in)12.29.67.54.92.81.41.61.21.22.63.57.356.1
Days19161611654446915115

Even during the rainy period, however, the amount of sunshine is acceptable because the tropical rains mainly occur in the form of downpours or thunderstorms, which can be intense but do not last long. However, the sunniest period is the dry and cool one, as can be seen in the following table.
Mayotte - Sunshine
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Hours667898999887

During the dry period, some brief thunderstorms are still possible, especially on the main island, where there are some small elevations: the highest point is Mount Benara, 600 meters (2,170 feet) high; in addition, the archipelago is protected by Madagascar, which is located just 300 kilometers (185 miles) away to the south-east.

Mayotte

The sea in Mayotte is always warm enough to swim in, in fact, the water temperature ranges from 26 °C (79 °F) in the July-September period to 29 °C (84 °F) in the February-April period.
Mayotte - Sea temperature
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Temp (°C)292929292827262626272828
Temp (°F)848484848281797979818282

Tropical cyclones



Mayotte is located in the path of tropical cyclones, which can affect the islands from November to mid-May, with a greater chance from late December to mid-April.

Best Time



The best time to visit Mayotte for a beach holiday is from June to October: the temperature is pleasantly warm, the sun frequently shines and the rains are rare.

What to pack



In winter (June to August): bring light clothes, a sweatshirt for the evening, and a scarf for the breeze. When going to the reef, you can bring snorkeling equipment, including water shoes or rubber-soled shoes.
In summer (December to February): bring tropics-friendly, loose-fitting clothing, light shirts and pants of natural fibers (cotton, linen), a light sweatshirt for the evening, and a light raincoat or umbrella for the rain showers.