Monsoon Advances to Andaman and Nicobar; Kerala Onset Expected May 26
Why it matters
The southwest monsoon delivers over 70% of India's annual rainfall, serving as the cornerstone of the agricultural economy. By tracking its movement from the southern Indian Ocean, meteorologists monitor its path through the Arabian Sea and Bay of Bengal. The progression into the Andaman Sea typically acts as a ten-day precursor to the Kerala onset. Favorable wind patterns and sea surface temperatures have facilitated a faster-than-usual advancement for 2026.
This timeline holds significant weight for the Kharif season, influencing planting schedules for crops like paddy, sugarcane, and cotton. To officially declare the onset, the IMD monitors rainfall intensity at 14 stations across Kerala and Lakshadweep, alongside westerly wind depth and Outgoing Longwave Radiation (OLR) metrics. Early data allows for better disaster management and irrigation planning.
| Region | Status |
|---|---|
| Andaman & Nicobar | Advanced |
| Kerala Onset (Expected) | May 26, 2026 |
| Normal Onset Date | June 1 |
Glossary
Kharif: The summer cropping season in India, coinciding with the southwest monsoon.
Outgoing Longwave Radiation (OLR): A measure of Earth's energy emission used to track cloud cover and monsoon intensity.
NaukriSync Exam Angle
Geography/Environment. Memorise: The IMD projected the 2026 Kerala monsoon onset for May 26, roughly a week before the long-term average of June 1. Expect questions regarding this specific date or the technical parameters, such as OLR and wind depth, that define the official monsoon arrival.