Parts of West Bengal are likely to witness heavy rainfall from September 22-25, 2026 under the influence of a low-pressure area in the Bay of Bengal, the IMD said on Sunday (September 20, 2026).

The weather system, which is likely to intensify into a deep depression as it moves towards the southern Odisha and northern Andhra Pradesh coast, is likely to cause high winds and rough sea conditions over the Bay of Bengal. The India Meteorological Department (IMD) advised fishermen not to venture into the sea on September 21 and 22.

The intensity of rainfall in West Bengal is likely to be higher in the coastal districts of Purba Medinipur and South 24 Parganas, with gusty winds reaching speeds of 40-50 kmph, it said.

Thunderstorms accompanied by lightning and gusty winds, reaching speeds of 30-40 kmph, are likely in one or two places in the remaining districts of south Bengal, including Kolkata, till September 25, 2026, the weather office said.

It said heavy rainfall will also occur in the sub-Himalayan districts of Darjeeling, Kalimpong, Jalpaiguri, Alipurduar and Cooch Behar from September 23 to 25.

Thunderstorms with gusty winds are likely over the other north Bengal districts of Uttar Dinajpur, Dakshin Dinajpur and Malda during the period, the IMD added.