IMD forecasts early monsoon onset over Kerala as forecasters warn season rainfall may still be weak

Tuesday, May 26, 2026Science & ClimateWell-covered3 frames

The India Meteorological Department has forecast that the southwest monsoon is likely to set in over Kerala on May 26.
June 1 is the normal date for monsoon onset over Kerala, so the current forecast would be earlier than usual if it is realized.
The forecast for Kerala’s monsoon onset carries an uncertainty of about plus or minus four days.
Before reaching Kerala, the monsoon was expected to advance into parts of the south Bay of Bengal, the Andaman Sea, and the Andaman and Nicobar Islands ahead of the normal schedule.
An early onset over Kerala does not by itself indicate how much rain India will receive during the full monsoon season.
Several reports say El Nino conditions are expected this year and are associated with a risk of below-normal monsoon rainfall in India.
The southwest monsoon season is important for India’s agriculture, water resources, and wider economy.
What remains unresolved is the overall strength and distribution of rainfall later in the season, which reports say will depend on factors such as ocean and wind patterns and the formation of low-pressure systems.

How left and right are reading this

Both agree: An earlier-than-usual monsoon onset over Kerala is a limited signal, not a verdict on the season India depends on, because the bigger unresolved question is how strong and well distributed rainfall will be later.
They split on: Less a disagreement than a question of emphasis: the human and economic costs if El Nino helps produce weak or uneven rains, versus the need for disciplined caution about reading a full-season outcome from an uncertain early-onset forecast.

Tuesday, May 26, 2026Science & ClimateWell-covered3 frames

The India Meteorological Department has forecast that the southwest monsoon is likely to set in over Kerala on May 26.
June 1 is the normal date for monsoon onset over Kerala, so the current forecast would be earlier than usual if it is realized.
The forecast for Kerala’s monsoon onset carries an uncertainty of about plus or minus four days.
Before reaching Kerala, the monsoon was expected to advance into parts of the south Bay of Bengal, the Andaman Sea, and the Andaman and Nicobar Islands ahead of the normal schedule.
An early onset over Kerala does not by itself indicate how much rain India will receive during the full monsoon season.
Several reports say El Nino conditions are expected this year and are associated with a risk of below-normal monsoon rainfall in India.
The southwest monsoon season is important for India’s agriculture, water resources, and wider economy.
What remains unresolved is the overall strength and distribution of rainfall later in the season, which reports say will depend on factors such as ocean and wind patterns and the formation of low-pressure systems.

How left and right are reading this

Both agree: An earlier-than-usual monsoon onset over Kerala is a limited signal, not a verdict on the season India depends on, because the bigger unresolved question is how strong and well distributed rainfall will be later.
They split on: Less a disagreement than a question of emphasis: the human and economic costs if El Nino helps produce weak or uneven rains, versus the need for disciplined caution about reading a full-season outcome from an uncertain early-onset forecast.