Why Madagascar Has a Tropical Climate: Geography, Winds, and Topography

Five Key Drivers

1. Equatorial Latitude (12°S–26°S)

Year-round direct solar radiation ensures consistently warm temperatures.

2. Southeast Trade Winds

Steady easterlies carry warm, moist air from the Indian Ocean, dumping heavy rain on the eastern escarpment (orographic lift).

3. Warm Ocean Currents

The Agulhas Current flows south along Africa's east coast, feeding warm water toward Madagascar, enhancing coastal warmth and evaporation.

4. Seasonal ITCZ Migration

The Intertropical Convergence Zone brings the wet season (Dec–Apr) with intense rainfall. The dry season (May–Nov) sees reduced precipitation.

5. Topographic Microclimates

• Central Highlands: Cooler, temperate at altitude.
• Eastern slopes: Wettest (rainforest).
• Western lowlands: Drier (rain shadow), dry deciduous forests.

Result

A tropical climate with distinct wet/dry seasons, strong east-west rainfall gradient, and altitude-driven temperature variation—supporting extraordinary biodiversity.