The Japan Meteorological Agency announced June 10 that an El Niño event has begun this spring [3].
This development is critical because El Niño patterns often trigger global weather disruptions, specifically increasing the risk of abnormal weather and a higher frequency of typhoons in Japan [1, 4].
The agency said sea surface temperatures near the equator off the coast of Peru have risen above average levels [4]. This warming is the primary driver of the phenomenon, which is occurring for the first time in two years [5].
Data indicates the El Niño monitoring index has exceeded +2.0°C [1]. Earlier forecasts had already suggested a 90% probability that an El Niño event would occur this summer [2].
Meteorologists are now warning of a more severe progression. There is a high possibility that a "super El Niño" will develop around October 2026 [4]. Such an intense event could exacerbate the volatility of seasonal weather patterns across the region.
The agency said the current conditions are likely to lead to significant atmospheric shifts. These shifts may result in unpredictable precipitation, and temperature swings throughout the remainder of the year [1, 3].
Japan continues to monitor the equatorial Pacific to determine the exact strength and duration of the cycle. The agency said the potential for extreme weather remains a primary concern for national disaster preparedness [1, 3].
“An El Niño event has begun this spring.”
The transition from a standard El Niño to a potential 'super El Niño' suggests a period of heightened climatic instability. For Japan, this typically translates to a shift in the path and intensity of typhoons, potentially leading to more severe flooding or unexpected drought conditions. The timing of the peak in October aligns with the tail end of the traditional typhoon season, which could extend the window of risk for coastal infrastructure and agriculture.
