The southwest monsoon is yet to reach Mumbai as of June 18 — more than a week past its normal June 11 onset — leaving the city staring at critically low reservoir levels and tightening water cuts with
no sustained relief in sight.
The India Meteorological Department has revised its forecast multiple times in recent weeks, with the monsoon’s advance stalling near the Harnai belt in south Konkan. Earlier predictions placed the Mumbai onset around June 18–19, then June 22–23; IMD now expects widespread monsoon rainfall over the city by the last week of June, with June 25–July 1 emerging as the most likely window.
Private forecaster Skymet has also flagged a cautious outlook, suggesting the city may see arrival only after June 25 — which would make it one of the more delayed onsets in recent years, comparable to 2019 and 2023.
What’s Behind The Delay?
A stalled Arabian Sea branch, weak westerly winds, and dry air intrusions over the Konkan coast have disrupted the monsoon’s advance, compounded by northwestern western disturbances and an emerging El Niño effect disrupting moisture-laden wind flows.
How Bad Is The Water Situation?
Mumbai’s seven reservoirs stood at just 10.35 per cent of total capacity as of June 16, with the city’s daily requirement at around 4,664 million litres against a supply of approximately 4,100 million litres. Current stocks are sufficient for roughly 40 days of consumption.
What Has BMC Done?
The BMC, which had already imposed a 10 per cent water cut from May 15, announced fresh restrictions effective June 17 — suspending water connections to construction sites, halting new connection approvals, and cutting supply to swimming pools, industrial users, and sports clubs.
Mumbai’s Seven Lakes At A Glance
| Lake | Catchment Rainfall 2026 | Status |
|---|---|---|
| Tansa | 13 mm | Critically low |
| Modak Sagar | 7 mm | Critically low |
| Bhatsa | Nil | No inflow |
| Upper Vaitarna | Nil | No inflow |
| Middle Vaitarna | Nil | No inflow |
| Vihar | Nil | No inflow |
| Tulsi | Nil | No inflow |
| Combined capacity: 14,47,363 million litres | Current stock: ~10.35% (as of June 16) | Source: BMC | ||
Will A Late Monsoon Mean A Weak One?
Meteorologists have been clear that a delayed onset does not automatically translate into a poor season — several years with late arrivals have ultimately delivered normal or above-normal rainfall over the full June–September period.
