Per the Oceanic Niño Index, El Niño emerged in June

Change in the Oceanic Niño Index (ONI) between January 2013 and July 2023

'ONI' = rolling three-month average temperature anomaly in the surface waters of an area in the eastern Pacific
Index values of +0.5°C or higher indicate El Niño; values of -0.5°C or lower indicate La Niña
Source: NOAA