Mumbai: The Mumbai Metropolitan Region (MMR), encompassing parts of Mumbai, Thane, and Navi Mumbai, can expect light rain activity starting later this week. According to independent weather forecasters, scattered light showers are likely to begin from Thursday, May 21, and continue into the following week.
Weather Systems Driving the Showers
“The summer anticyclone over the Arabian Sea has now dissipated, allowing low-level moisture-laden westerlies to enter Konkan, including Mumbai, from Tuesday, May 19, ahead of the monsoon. This infusion of moisture, along with support from a developing low-pressure system off Karnataka, will trigger showers coming from the west and localised thunder too overnight,” said Athreya Shetty, an independent weather forecaster.
Rajesh Kapadia of Vagaries of Weather added, “The pre-monsoon low-pressure system over the Arabian Sea has already triggered widespread rainfall across Kerala, coastal Karnataka and parts of Goa. As the system gradually strengthens the offshore trough along the west coast later this week, we can expect an increase in pre-monsoon thunderstorm activity from May 24 to 28 along the entire west coast, including the Konkan region. Mumbai, too, is likely to witness spells of showers during this period.”
IMD Forecast and Monsoon Onset
The India Meteorological Department (IMD), in its five-day forecast from May 18 to 22, stated that Raigad could see light rain and thundershowers. The official date for the onset of the monsoon over Mumbai is June 11, with last year witnessing the earliest-ever onset on May 26, 2025.
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About the Author
Richa Pinto is a special correspondent with The Times of India. She covers urban governance and climate change issues. With over a decade of experience in field reporting, she has written extensively on various civic issues affecting Mumbaikars. She graduated in journalism from the prestigious Mumbai-based St Xavier's College and later pursued a three-year Law degree (L.L.B.) with the University of Mumbai. She regularly tweets about all things that matter to Mumbai on @richapintoi.
