The rain will continue till Thursday, according to the India Meteorological Department.
Heavy rainfall is expected in Malappuram, Kozhikode, Kannur and Kasaragod districts.
The Met department said that Kerala is likely to get widespread showers from June 11.
According to the satellite imagery, there is an increase in cloudiness over the Kerala coast and adjoining the southeast Arabian Sea.
Releasing its second long range forecast for southwest monsoon 2021, IMD Director General Mrutunjay Mohapatra said June is likely to witness normal monsoon which is also the sowing season.
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The monsoon onset over Kerala is likely by June 3, according to the latest forecast of India Meteorological Department.
IMD Director General M Mohapatra said there is cyclonic circulation along the Karnataka coast which is hindering the progress of the southwest monsoon.
The southwest monsoon has advanced further in more parts of southwest and eastcentral Bay of Bengal.
The mortality rate due to tropical cyclones has come down significantly over the past 10 years.