What is La Niña? Its Impact on Indian Climate & Agriculture

Table of Contents

• What is the La Niña Effect?
• What is the Global Impact of La Niña?
• Implications of La Niña for India
  • Effect on the Indian Climate
  • Effect on Indian Agriculture
• Policy Measures for Strategic Action
• Conclusion

What is the La Niña Effect?

La Niña is also known as ‘Little Girl’ in Spanish. It is a global climatic phenomenon recognized as the cool phase of the El Niño Southern Oscillation (ENSO). Due to this climate pattern, sea surface temperatures in the central and eastern tropical Pacific Ocean experience periodic cooling. It involves the movement of strong trade winds, which intensifies the upwelling of cold water in the eastern Pacific. It has a significant impact during the winter and monsoon seasons in India.

Generally, these climatic episodes occur every 2-7 years but are not regular events. The Down to Earth report says that the January 2025 was recorded as the warmest month with a 1.75°C anomaly despite La Niña.

According to the World Meteorological Organization's forecast, 55% of sea surface temperatures in the equatorial Pacific were expected to cool to La Niña levels, and 45% to remain at ENSO-neutral levels during the September–November 2025 period. For October–December 2025, the La Niña establishment slightly increased to about 60%, while the ENSO-neutral conditions decreased to around 40%.

What is the Global Impact of La Niña?

The Pacific Ocean temperatures change due to La Niña which impacts tropical rainfall patterns from Indonesia to South America (west coast). La Niña effects include changes in global weather patterns. In North America, northern regions experience colder winters, while southern regions experience warmer, drier conditions. In South America, Brazil experiences increased rainfall, while Ecuador and Peru experience drought. Central America can face crop loss due to floods.

In Asia, intense monsoons occur in India and South Asia. There is increased precipitation and a higher risk of flooding in Southeast Asia and Australia. In Africa, enhanced rainfall may be observed in Southern Africa. Also, there is a risk of droughts that can endanger crops and livestock.

Implications of La Niña for India

The major effects of La Nina are on the climate and agriculture. Let’s discuss both:

Effect on the Indian Climate

El Niño-Southern Oscillation (ENSO) has a big impact on the Indian climate, along with the monsoon and agriculture. More intense monsoons are observed due to La Niña, resulting in above-average rainfall in most parts of the country. Cooler temperatures can be observed post-monsoon and during winter months. Coastal regions are at risk due to increased cyclone activity in the Indian Ocean. La Niña leads to colder winters in northern India, with states like Himachal Pradesh, Haryana, and Punjab experiencing cold waves and frost.   

Effect on Indian Agriculture

The agricultural sector of India is impacted by weather patterns induced by La Niña. It is usually beneficial for monsoon-dependent crops like paddy, sugarcane, and pulses because of increased rainfall. More rainfall boosts the growth and development of several Kharif crops. In addition, it can help in recharging groundwater levels. The rainfall intensity and timing can also influence variations in crop yields.

However, there are high chances of crop damage in regions that receive flooding or excessive precipitation. Low-lying areas can get flooded, which damages standing crops, which also delays their harvesting. Waterlogging can cause pest and disease infestations to hamper yields. Due to changes in the onset and intensity of rainfall, planting schedules and variety selection need to be adjusted accordingly.

Policy Measures for Strategic Action

La Niña can easily impact water management, agriculture, health, energy, and infrastructure in India. There is a need for mitigating risks related to increased cyclone activity, extreme winters, and intense monsoon seasons.

• The adoption of flood-resistant paddy varieties, such as Swarna Sub1, among farmers needs to be promoted, especially in states like West Bengal, Bihar, and Assam.
• Excessive humidity can cause different crop diseases and fungal infections, so wheat sowing schedules need to be adjusted in the states of Haryana and Punjab.
• Water management is necessary for flood-prone areas, and overflow-related disasters can be prevented through effective reservoir and dam management. Stormwater drainage is required to manage waterlogging.
• Better infrastructure is needed for enduring heavy storms, floods, and rain. Better floodplain zoning and robust embankments must be developed in rural areas. Also, sustainable drainage solutions are effective in urban areas. Cyclone shelters and storm surge barriers need to be upgraded to better protect cities like Visakhapatnam and Chennai against severe coastal storms.
• Waterborne disease outbreaks are common in waterlogged conditions. Mosquito control is highly important in affected areas, along with early disease surveillance and sanitation initiatives.
• Increased monsoon rains can help increase hydropower generation while ensuring effective dam management.

Conclusion

La Niña effects are complex and vary across regions. In India, La Niña can cause a cooler winter in North India, increased cyclone activity in the Indian Ocean, and an intense southwest monsoon. La Niña has both pros and cons for the Indian climate and agriculture. Thus, there is a need for strategic preparedness to handle damage to crops and infrastructure.