The rainfall along the Malabar coast is caused mainly by the Arabian Sea branch of the southwest monsoon winds.

Quick Scoop: Explained Simply

  • In June, moist southwest monsoon winds blow from the Arabian Sea towards the Western Ghats.
  • When these winds hit the Western Ghats, they are forced to rise, cool, and condense, resulting in very heavy rain along the Malabar coast (Kerala and adjoining Karnataka coast).
  • This specific part of the southwest monsoon is called the Arabian Sea branch , and it is the chief cause of Malabar’s famous monsoon rains.

So if you’re answering an exam-style question, you can write:

The Arabian Sea branch of the southwest monsoon winds accounts for rainfall along the Malabar coast.

Information gathered from public forums or data available on the internet and portrayed here.