In Nosy-Be (or Nosy-Bé) the climate is tropical, hot all year round, with a hot and rainy season from November to April, and a dry season from May to October.
The island is located off the northwest coast of Madagascar, in an area that in the austral summer is affected by the hot and humid monsoon coming from the north-west, while in the austral winter the cooler and drier south-east trade winds prevail. The climate of the neighbouring islands, such as Nosy Komba, Nosy Mitsio, Nosy Tanikely and Nosy Sakatia, is similar.
In an average year, there are about 2,200 millimetres of rain fall. In the rainiest months (December, January and February), rains are very frequent, occurring almost daily, and can sometimes be torrential. At the height of the dry season, from June to September, showers are very rare; in May and October they are a bit more frequent but generally not intense.
In the period that could be called Madagascar’s winter, from June to September, at night the temperature usually drops below 20 °C, and sometimes can even drop to around 15/16 °C, but during the day it's almost always warm, thanks to the winds that blow from the interior of Madagascar. The amount of sunshine in Nosy Be is good from May to October, while it is acceptable in the rainiest months which are December, January and February.