The south west monsoon engulfs the entire India by

Although the Andaman & Nicobar Islands receive monsoon as early as mid-May, the southwest monsoon enters the subcontinent’s mainland through the Kerala coast. The monsoon then gets divided into two parts: the Arabian Sea branch and the Bay of Bengal branch. It normally reaches Mangalore on the west coast and Vishakhapatnam on the east coast within four days. Both the branches move to reach Mumbai and Kolkata on average between June 10 and 13. The monsoon crosses Varanasi, Ahmedabad and Bhopal by June 15. Agra has to wait for another five days and Delhi by June 29. The two branches merge over Punjab and Himachal. By mid-July, the southwest monsoon engulfs the entire subcontinent.