The western coasts of India receive very high rainfall in summer mainly due to

The high rainfall on India's western coast during the summer (southwest) monsoon is primarily due to the orographic influence of the Western Ghats. As moisture-laden winds from the Arabian Sea branch reach the coast, they are obstructed by the north-south oriented mountain range [c1, t6]. These winds are forced to climb the windward slopes (900-1200 m), where they cool adiabatically, leading to saturation and heavy precipitation ranging from 250 cm to over 400 cm [c1, c3, t5]. This orographic uplift creates a sharp contrast between the wet coastal plains and the rain-shadow region on the leeward side of the Sahyadris [c1, c4]. While tropical location and nearness to the sea provide the necessary heat and moisture source, the physical barrier of the Western Ghats is the decisive factor for the intensity and spatial distribution of the rainfall in this specific region [t1, t4].

Sources

1. [1] INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.) > Chapter 4: Climate > Monsoon Winds of the Arabian Sea > p. 35
2. [2] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 3: The Drainage System of India > Rivers of the Western Sahyadris > p. 22
3. [3] Exploring Society:India and Beyond ,Social Science-Class VII . NCERT(Revised ed 2025) > Chapter 3: Climates of India > The Monsoons > p. 55
4. [4] https://eprints.whiterose.ac.uk/id/eprint/202137/1/QJ-22-0313R1_clean.pdf
5. [5] https://www.sciencedirect.com/science/article/abs/pii/S1474706525001536
6. [6] https://www.sciencedirect.com/science/article/abs/pii/S0048969717323069