El Nino Returns in 2026: How the ENSO Cycle Could Shape India's Monsoon and Farming

On June 11, 2026, weather scientists confirmed that an El Nino has formed in the Pacific Ocean, and early signs suggest it could grow into one of the strongest on record. El Nino is the warm phase of a natural ocean and atmosphere cycle called the El Nino Southern Oscillation, or ENSO. In simple terms, the surface waters of the eastern Pacific Ocean, off the coast of Peru, turn warmer than usual for several months. This shift in ocean temperature changes wind and rainfall patterns far across the world, including over India. The opposite, cooler phase of the same cycle is called La Nina.

Scientists watch a fixed patch of the Pacific known as the Nino 3.4 region to track these changes. When that water stays at least 0.5 degrees Celsius warmer than normal, an El Nino is declared. A rise of 2 degrees or more is treated as a very strong event. Forecasters now expect the 2026 El Nino to peak around November or December, and some models warn it could push ocean temperatures far above normal, raising the risk of heatwaves, droughts and uneven rains in many regions.

For India, the worry is the monsoon, which runs from June to September and waters most of the country's crops. The India Meteorological Department has flagged a possible shortfall of about 10 percent against the long-period average and given a 60 percent chance of a deficient season. History shows the link is real but not fixed: since 1951, 12 of 17 El Nino years saw below-normal monsoon rains in India. Yet other factors, such as the Indian Ocean Dipole and local low-pressure systems, can soften or worsen the effect, so the outcome is never certain.

The stakes are highest for farmers. A weak or uneven monsoon can hurt rain-fed crops like pulses, oilseeds and cotton in regions such as Marathwada and north interior Karnataka. This matters for prices on the dinner table, since India already imports large quantities of pulses and edible oil. The government has identified 197 districts as most vulnerable and prepared state-wise contingency plans, including advice to sow drought-resistant and shorter-duration seed varieties. India is better placed than during the droughts of 2014 and 2015, with more than 60 percent of cropland now irrigated and reservoir levels above normal.

For exam aspirants, this story ties geography, environment and the economy together. Understand the ENSO cycle, why El Nino weakens the Indian monsoon, the role of the Indian Ocean Dipole as a balancing factor, and the government's drought-management response. These are recurring themes in current affairs and general studies papers.