Low pressure formed in the Arabian Sea will not have any effect on the Sub Continent Weather,
Somali Currents may strengthen to some extent.
As mentioned in Monsoon Watch -3 Part -2 (Additional), the estimated dates of arrival of Monsoon in India remains unchanged...
SWM should hit South Andaman Sea around 20th.May (12/15th May), and rest Andaman Islands by 23rd May 2018.
Generally moves up (normally) the Bay at a sustained speed, and Kolkata should see Monsoon arrival by the 14th of June.
Vagaries would estimate the Monsoon to reach Maldives around the 24th of May 2018 (20th May), Sri Lanka around 29th/30th of May (25th May).
Kerala by the 2nd/4th June (1st June)...
Hence, maintaining and presuming the normal rate of progress, As the Seasonal Low strengthens, Monsoon could "slide " up the coast to be in Goa should get Monsoon rains by around 8th/10th June (5th June).... NE States can also see Monsoon resume around that date.
Mumbai by 12th/14th June (9th June)..... Pre Monsoon thunder showers in Mumbai could start from around 4th/5th June 2018.