On May 15, the weather office had announced the onset of monsoon over Kerala by May 31.
Southwest monsoon has furthered advanced into some parts of south Arabian Sea
Meteorologists earlier said Cyclone 'Biparjoy' had been impacting the intensity of the monsoon and that its onset over Kerala would be 'mild'.
The southwest monsoon is expected to reach Kerala during the next two to three days, marking a sluggish start to the seasonal rains that are the lifeline of India's agri-based economy.
Conditions are becoming favourable for onset of southwest monsoon over Kerala during next two to three days, according to India Meteorological Department in Pune.
It has also advanced into most parts of Tamil Nadu, some parts of south interior Karnataka and remaining parts of south Bay of Bengal, according to IMD.
Southwest monsoon hit Kerala on Friday marking the start of the rainy season, four days after its normal onset date.
"Conditions are favourable for the onset of southwest monsoon over Kerala and its further advance into some more parts of south Arabian sea, remaining parts of Maldives - Comorin area, some parts of Tamil Nadu and some more parts of Bay of Bengal during the next 24 hours," said a statement by the Indian Meteorological Department.