Southwest monsoon advances: Heavy rain, strong winds across Tamil Nadu till June 9
Synopsis
The southwest monsoon is advancing fast — and Tamil Nadu is bearing the brunt. The RMC Chennai has put over a dozen districts on alert for heavy rain and 40–60 kmph winds through June 9, with fishermen explicitly warned off the sea. This is the most active monsoon stretch the state has seen this season.
Key Takeaways
RMC Chennai has forecast heavy rain, thunderstorms, and strong winds across Tamil Nadu from 7 June to 9 June 2025 .
An upper-air cyclonic circulation over coastal Karnataka at 3.1–4.5 km altitude is driving the weather system.
Gusty winds of 40–50 kmph , gusting to 60 kmph , are expected along the Tamil Nadu coast , Gulf of Mannar , and Comorin Sea .
Heavy rainfall alerts cover Nilgiris , Theni , Dindigul , Tiruppur , Kanyakumari , and hilly parts of Coimbatore .
Fishermen have been advised not to venture into the sea through 9 June .
Chennai maximum temperature forecast at 38°C–39°C with partly cloudy skies and possible light rain.
The Regional Meteorological Centre (RMC), Chennai, has forecast widespread rainfall, thunderstorms, and strong winds across large parts of Tamil Nadu from Saturday, 7 June through 9 June 2025, as the southwest monsoon continues its northward advance over southern India. The alert covers coastal, interior, and hilly districts, with fishermen warned to stay off the sea during the period.
Monsoon Advance and Weather System
According to the weather department, an upper-air cyclonic circulation is persisting over coastal Karnataka and adjoining areas at altitudes between 3.1 km and 4.5 km above mean sea level. This system is driving moisture-laden winds inland.
The southwest monsoon has further advanced into the remaining parts of the southwest and southeast Arabian Sea, sections of the west-central and east-central Arabian Sea, Lakshadweep, parts of Kerala, Karnataka, and Tamil Nadu, as well as large areas of the Bay of Bengal.
District-wise Forecast: Saturday and Sunday
On Saturday, 7 June, light to moderate rain with thunderstorms is likely at isolated places across Tamil Nadu, Puducherry, and Karaikal. Heavy rain with thunderstorms and gusty winds reaching 40–50 kmph is expected in the hilly regions of Coimbatore district and in the Nilgiris, Theni, and Dindigul districts.
Isolated heavy rainfall and strong winds are also forecast for Tenkasi, Tirunelveli, Kanyakumari, Erode, Salem, Dharmapuri, Krishnagiri, Tirupattur, Vellore, Ranipet, Tiruppur, Madurai, and Virudhunagar.
For Sunday, 8 June, the RMC has predicted light to moderate rain with thunderstorms across Tamil Nadu, Puducherry, and Karaikal. Heavy rainfall is likely in the Nilgiris, Tiruppur, Dindigul, Theni, Kanyakumari, and the hilly areas of Coimbatore district. Thunderstorms with gusty winds are expected to continue in Tenkasi, Tirunelveli, Erode, Salem, Dharmapuri, Krishnagiri, Virudhunagar, and Madurai.
Chennai Outlook
In Chennai, the sky is expected to remain partly cloudy on Saturday, with some parts of the city likely to receive light to moderate rain accompanied by thunderstorms. The maximum temperature is forecast at 38°C to 39°C, with the minimum hovering between 29°C and 30°C.
Maritime Warning: Fishermen Advised to Stay Ashore
The weather department has issued a formal warning for fishermen and maritime activities. Strong winds with speeds of 40–50 kmph, gusting up to 60 kmph, are likely over the Tamil Nadu coast, Gulf of Mannar, and Comorin Sea from Saturday through 9 June.
Similar rough conditions are expected over the southern Bay of Bengal, adjoining central Bay of Bengal, the Andaman Sea, the Kerala–Karnataka coast, Lakshadweep, and the Maldives region. Fishermen have been advised not to venture into the sea during the warning period and to exercise extreme caution.
With the monsoon advancing steadily, weather conditions across Tamil Nadu are expected to remain active through next week.
Point of View
Reaching multiple Tamil Nadu districts ahead of its typical inland progression. What deserves attention is the breadth of the warning — over a dozen districts simultaneously, from coastal Kanyakumari to interior Salem and Dharmapuri. For a state still managing urban drainage deficits in cities like Chennai, a sustained multi-day rain event is less a weather story and more an infrastructure stress test. The fishermen advisory, covering not just Tamil Nadu's coast but the Andaman Sea and Lakshadweep, signals that this is a regional system with significant maritime reach, not a localised shower spell.
NationPress
6 Aug 2026
Frequently Asked Questions
Which districts in Tamil Nadu are under heavy rain alert till June 9?
The RMC Chennai has issued heavy rain alerts for the Nilgiris, Theni, Dindigul, Tiruppur, Kanyakumari, and hilly areas of Coimbatore district, with thunderstorm and gusty wind warnings also covering Tenkasi, Tirunelveli, Erode, Salem, Dharmapuri, Krishnagiri, Virudhunagar, and Madurai.
Why is Tamil Nadu experiencing heavy rain in early June 2025?
The southwest monsoon has advanced over southern India, and an upper-air cyclonic circulation persisting over coastal Karnataka at 3.1–4.5 km altitude is channelling moisture-laden winds into Tamil Nadu. This combination is producing widespread rainfall, thunderstorms, and strong winds across the state.
What is the maritime warning issued for Tamil Nadu fishermen?
Fishermen have been advised not to venture into the sea from 7 June through 9 June 2025. Strong winds of 40–50 kmph, gusting up to 60 kmph, are forecast over the Tamil Nadu coast, Gulf of Mannar, and Comorin Sea, with rough conditions also extending to the southern Bay of Bengal and Andaman Sea.
What is the weather forecast for Chennai on 7 June 2025?
Chennai is expected to have partly cloudy skies on Saturday, 7 June, with light to moderate rain and thunderstorms possible in some parts of the city. The maximum temperature is forecast at 38°C–39°C and the minimum at 29°C–30°C.
How far has the southwest monsoon advanced as of June 6, 2025?
As of 6 June 2025, the southwest monsoon has advanced into the remaining parts of the southwest and southeast Arabian Sea, sections of the west-central and east-central Arabian Sea, Lakshadweep, parts of Kerala, Karnataka, and Tamil Nadu, as well as large areas of the Bay of Bengal.
