Heavy rain, gusty winds forecast for Tamil Nadu districts on Aug 7-8
Synopsis
The IMD has flagged heavy rain and gusty winds for Coimbatore, Theni, Tirunelveli, and the Nilgiris on Thursday and Friday, driven by a weak atmospheric circulation over northern Tamil Nadu's coast. With moderate showers extending to Chennai and over a dozen other districts through Sunday, the wet spell covers much of the state — and the Western Ghats remain the focal point of risk.
Key Takeaways
IMD has forecast heavy rain with gusty winds over Coimbatore , Theni , Tirunelveli , and hilly areas of the Nilgiris on 7-8 August 2025 .
A weak atmospheric circulation over coastal northern Tamil Nadu is driving the wet spell, with the Western Ghats expected to receive the heaviest rainfall.
Theni , Tenkasi , and Tirunelveli are also likely to see heavy rain at isolated places on Saturday .
Moderate rainfall is forecast through Sunday across Chennai , Tiruvallur , Kancheepuram , Madurai , and several other districts.
Chennai's maximum temperature could reach around 36 degrees Celsius on Thursday despite evening showers.
Residents in hilly and ghat regions have been advised to remain alert to rapidly changing weather conditions.
The India Meteorological Department (IMD) has forecast heavy rainfall accompanied by gusty winds over parts of four Tamil Nadu districts on Thursday, 7 August and Friday, 8 August 2025, with moderate showers expected to persist across several other districts through the weekend. The warning covers Coimbatore, Theni, Tirunelveli, and the hilly areas of the Nilgiris.
What Is Driving the Wet Spell
Weather officials have attributed the intensified rainfall activity to a weak atmospheric circulation prevailing in the lower tropospheric levels over the coastal areas of northern Tamil Nadu. This system is expected to enhance rainfall, particularly over the Western Ghats and adjoining districts, where terrain amplifies moisture-laden winds sweeping in from the coast.
The pattern is consistent with the state's typical mid-monsoon behaviour along the ghats, though the combination of heavy rain and strong winds raises localised risk for hilly and ghat regions.
District-Wise Forecast Breakdown
Thursday and Friday: Heavy rain with strong winds likely over Coimbatore, Theni, Tirunelveli, and hilly areas of the Nilgiris. Residents and travellers in vulnerable zones have been advised to remain alert to rapidly changing conditions.
Saturday: Heavy rainfall at isolated places expected in Theni, Tenkasi, and Tirunelveli districts.
Through Sunday: Moderate rainfall forecast across Chennai, Tiruvallur, Kancheepuram, Chengalpattu, Ranipet, Vellore, Tirupattur, Tiruvannamalai, Villupuram, Tiruchirappalli, Karur, and Madurai. Light, scattered showers are possible elsewhere across the state.
Chennai Outlook
In Chennai, skies are expected to remain partly cloudy on Thursday, with moderate rainfall likely during the evening or night. The maximum temperature could touch around 36 degrees Celsius, keeping conditions warm and humid despite the showers. The rain may offer temporary relief but is unlikely to significantly ease daytime heat.
Broader State Conditions
The IMD noted that maximum temperatures across Tamil Nadu and Puducherry are expected to remain close to seasonal norms. Rainfall activity is set to remain concentrated mainly along the Western Ghats and parts of northern and interior Tamil Nadu over the next few days, with isolated showers elsewhere. Authorities have urged residents in ghat areas and flood-prone zones to stay vigilant as the wet spell is expected to continue into the weekend.
Point of View
And a weak circulation system layered on top of already saturated terrain raises landslide and flash-flood risk that a standard weather advisory does not fully convey. The districts flagged — Theni, Tirunelveli, and the Nilgiris — have histories of landslip events during heavy monsoon spells. State disaster management agencies and district administrations will need to be proactive rather than reactive, particularly for remote ghat communities where evacuation windows are narrow.
NationPress
6 Aug 2026
Frequently Asked Questions
Which Tamil Nadu districts are on heavy rain alert on August 7 and 8?
The IMD has placed Coimbatore, Theni, Tirunelveli, and the hilly areas of the Nilgiris under a heavy rain and gusty winds alert for Thursday, 7 August, and Friday, 8 August 2025.
What is causing the heavy rainfall in Tamil Nadu this week?
A weak atmospheric circulation in the lower tropospheric levels over the coastal areas of northern Tamil Nadu is driving the wet spell. This system is channelling moisture-laden winds toward the Western Ghats and adjoining districts, intensifying rainfall there.
Will Chennai receive heavy rain this week?
Chennai is expected to see moderate rainfall, likely during the evening or night on Thursday, with partly cloudy skies. Moderate showers are forecast to continue through Sunday. The city is not under a heavy rain alert, but temperatures could still reach around 36 degrees Celsius.
How long will the rainfall activity last across Tamil Nadu?
The IMD expects rainfall activity to continue through the weekend. Heavy rain is forecast for Thursday and Friday in four districts, with isolated heavy spells continuing in some districts on Saturday and moderate rain across many districts through Sunday.
Which other Tamil Nadu districts will see moderate rain through Sunday?
Moderate rainfall is expected across Tiruvallur, Kancheepuram, Chengalpattu, Ranipet, Vellore, Tirupattur, Tiruvannamalai, Villupuram, Tiruchirappalli, Karur, and Madurai, along with Chennai, through Sunday.
