IMD forecasts six-day rain spell over Tamil Nadu, Puducherry as Bay depression moves inland
Synopsis
A deep depression over the northwest Bay of Bengal is set to deliver a six-day rain spell across Tamil Nadu and Puducherry through 10 July, even as the system tracks northward toward Odisha and Chhattisgarh. Chennai faces light showers and a sticky 37°C — indirect relief, not a downpour, but enough to shift the weather calculus across southern India.
Key Takeaways
The IMD has forecast moderate rainfall across Tamil Nadu , Puducherry , and Karaikal from 5 July to 10 July .
A deep depression over the northwest Bay of Bengal near north Odisha and West Bengal coasts is driving enhanced moisture inflow southward.
The system is expected to move west-northwestwards toward North Odisha and North Chhattisgarh over the next three days.
Chennai can expect partly cloudy skies, isolated light rain, and a maximum temperature of around 37 degrees Celsius .
Widespread heavy rain is not anticipated at this stage; residents in flood-prone districts are advised to monitor official advisories.
The India Meteorological Department (IMD) has forecast moderate to widespread rainfall across Tamil Nadu and Puducherry from 5 July to 10 July, as a deep depression over the Bay of Bengal continues to drive enhanced moisture inflow over southern India. While the system is centred well north of the state, its circulation is expected to sustain favourable rain conditions across several districts over the coming days.
Where the Weather System Stands
According to the IMD's latest bulletin, the deep depression currently lies over the northwest Bay of Bengal and adjoining coasts of north Odisha and West Bengal. The system is projected to move west-northwestwards over the next three days before tracking inland toward North Odisha and North Chhattisgarh. Its northward trajectory means Tamil Nadu will not bear the system's direct brunt, but its outer circulation will continue to funnel moisture into the region.
What Tamil Nadu and Puducherry Can Expect
The IMD has forecast moderate rainfall at isolated places across Tamil Nadu, Puducherry, and Karaikal through 10 July. Widespread heavy rain is not anticipated at this stage, but intermittent showers are expected to bring some relief from the warm and humid conditions that have persisted across much of the state. Residents in districts prone to waterlogging have been advised to monitor updated advisories closely.
For Chennai, the forecast calls for partly cloudy skies with the possibility of light rain in isolated parts of the city. Prolonged or heavy rainfall is unlikely for the capital, though brief spells may occur through the day. Despite the cloud cover, daytime temperatures are expected to remain elevated, with the maximum likely to touch around 37 degrees Celsius, accompanied by high humidity.
IMD Advisory and Local Response
The weather department has underscored that forecasts may be revised as the depression's movement and intensity evolve. Local authorities have been put on standby to monitor and respond to any weather-related disruptions. The IMD has urged the public to follow official advisories issued periodically as the system advances inland over eastern India.
Context and Broader Impact
The expected rainfall is anticipated to provide relief to regions that have endured dry spells and above-normal temperatures in recent days. Notably, this is not the first time a Bay of Bengal system has delivered indirect rainfall benefits to Tamil Nadu — the state frequently receives enhanced precipitation from remote depressions through moisture-laden southwesterly winds. This comes amid a broader pattern of active Bay of Bengal weather through July, which typically marks the peak of the southwest monsoon season across peninsular India. The IMD's evolving forecasts will be critical in determining whether the rain intensifies or dissipates as the depression weakens over land.
Point of View
Isolated, not alarming — but the real risk lies in complacency: districts with poor drainage infrastructure can flood even from intermittent showers if the moisture persists for six consecutive days. The broader concern is the state's uneven preparedness across districts, where local authority response times vary sharply. With the depression still evolving, the IMD's commitment to issuing updated bulletins is the right call — but public communication at the district level will determine whether that information actually reaches those who need it most.
NationPress
5 Jul 2026
Frequently Asked Questions
Why is Tamil Nadu expecting rain if the depression is near Odisha?
Even though the deep depression is centred over the northwest Bay of Bengal near north Odisha and West Bengal, its outer circulation is enhancing moisture inflow over Tamil Nadu. This is a common monsoon-season pattern where remote Bay systems funnel southwesterly winds loaded with moisture toward peninsular India, triggering widespread but moderate rainfall.
How long will the rain last in Tamil Nadu and Puducherry?
The IMD has forecast moderate rainfall at isolated places across Tamil Nadu, Puducherry, and Karaikal from 5 July to 10 July — a span of six days. The duration may be revised depending on the depression's movement and intensity as it tracks inland.
What is the weather forecast for Chennai specifically?
Chennai is expected to see partly cloudy skies with light rain possible in isolated parts of the city. Prolonged heavy rainfall is unlikely. The maximum temperature is forecast to hover around 37 degrees Celsius, with humidity remaining high.
Should residents in Tamil Nadu be on alert?
The IMD has advised residents — particularly those in districts prone to waterlogging — to track updated weather bulletins closely. Local authorities have been placed on standby to respond to any weather-related disruptions. Widespread heavy rain is not forecast at this stage, but conditions could change as the system evolves.
When will the deep depression move inland and weaken?
The system is expected to move west-northwestwards over the next three days and track inland toward North Odisha and North Chhattisgarh. Depressions typically weaken once they move over land and lose their oceanic moisture source, which could gradually reduce their influence on Tamil Nadu's weather.
