IMD forecasts heavy rain, strong winds in Tamil Nadu Western Ghats till August 6
Synopsis
A weak low-pressure system off Tamil Nadu's coast is set to drench the Western Ghats districts — Coimbatore, Nilgiris, Theni, Tirunelveli, and Kanyakumari — with heavy rain and gusty winds until 6 August. Landslide-prone hill zones are on alert, while Chennai braces for evening showers even as daytime temperatures hold near 38°C.
Key Takeaways
The IMD has forecast heavy rainfall and strong winds across Tamil Nadu's Western Ghats districts from 1 August to 6 August .
Districts on alert include Coimbatore , Tirunelveli , the Nilgiris , Theni , and Kanyakumari .
A weak low-pressure circulation over the Tamil Nadu coast is sustaining favourable conditions for rainfall.
Chennai may receive moderate evening or night rain, but daytime temperatures are expected to remain near 38°C .
Daytime temperatures across Tamil Nadu , Puducherry , and Karaikal could fall by up to 2°C due to increased cloud cover.
Residents in landslide-prone hill areas have been advised to stay alert and avoid travel during heavy rain spells.
The India Meteorological Department (IMD) has forecast heavy rainfall accompanied by gusty winds across the Western Ghats districts of Tamil Nadu from 1 August, with the weather system expected to persist through 6 August. A weak low-pressure circulation over the state's coastal areas is sustaining the conditions driving the forecast.
Districts Under Alert
The IMD has identified Coimbatore, Tirunelveli, the Nilgiris, Theni, and Kanyakumari as the districts most likely to bear the brunt of widespread rainfall. Heavy showers are particularly expected over hilly and ghat terrain, where moisture-laden winds are funnelled by topography, intensifying precipitation during evening and night hours.
Strong gusty winds accompanying the rain have prompted authorities to advise residents in vulnerable areas to exercise caution. Landslide-prone localities in the hill districts are on heightened alert, with officials urging people to avoid travel through mountainous zones during periods of intense rainfall.
Coastal and Northern Districts
Beyond the ghat region, the weather department has predicted moderate rainfall with strong winds at one or two locations along Tamil Nadu's northern coastal districts. While widespread flooding is not anticipated, isolated pockets may experience brief but intense downpours, particularly after dusk.
Chennai Weather Outlook
The state capital Chennai is likely to receive moderate rain during the evening or night, offering temporary respite from prevailing heat. However, daytime temperatures are expected to remain elevated, with the maximum likely to hover around 38 degrees Celsius despite increased cloud cover.
Temperature Relief Across the State
Across Tamil Nadu, Puducherry, and Karaikal, the IMD has projected a marginal fall in daytime temperatures — a drop of up to 2 degrees Celsius over the coming days — as enhanced cloud cover and rainfall activity associated with the prevailing system moderate the heat. Authorities are closely monitoring the evolving situation as rainfall is expected to continue across several parts of the state through the first week of August.
Point of View
But the detail that matters is the landslide risk — Nilgiris and Theni have a documented history of slope failures during sustained rainfall events. The forecast of moderate rather than widespread flooding may understate localised risk in ghat micro-catchments. Authorities monitoring the 'evolving situation' need to be specific about evacuation triggers, not just general advisories, if the low-pressure system deepens unexpectedly.
NationPress
1 Aug 2026
Frequently Asked Questions
Which Tamil Nadu districts are under heavy rain warning until August 6?
The IMD has placed Coimbatore, Tirunelveli, the Nilgiris, Theni, and Kanyakumari under a heavy rainfall forecast until 6 August. These districts lie along the Western Ghats and are most exposed to moisture-laden winds driven by the coastal low-pressure system.
What is causing the heavy rainfall in Tamil Nadu's Western Ghats?
A weak low-pressure circulation persisting over Tamil Nadu's coastal areas is sustaining conditions favourable for heavy rainfall. This system is channelling moisture-laden winds into the ghat region, intensifying precipitation especially during evening and night hours.
Will Chennai receive rain during this period?
Chennai is likely to receive moderate rainfall during evening or night hours. However, daytime temperatures are expected to remain high, around 38 degrees Celsius, limiting the overall cooling effect.
Is there a risk of flooding or landslides?
Widespread flooding is not anticipated, according to the IMD. However, landslide-prone and hilly areas — particularly in the Nilgiris and Theni — face elevated risk during periods of intense rainfall, and residents have been advised to stay alert to local weather advisories.
How long will the rain last in Tamil Nadu?
The IMD has forecast that moderate to heavy rainfall will continue across several parts of Tamil Nadu through 6 August, coinciding with the first week of August. Authorities are monitoring the situation as the low-pressure system is expected to sustain favourable rainfall conditions during this period.
