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El Niño and La Niña
Latest status (November 2017)

In the past month or so, sea surface temperatures of the central and eastern equatorial Pacific continued to cool. Based on the latest oceanic observations as well as forecasts by a number of climate models around the world, the cooling trend is expected to persist in winter 2017/18 (December 2017 – February 2018), indicating that La Niña may start to develop.

Sea surface temperature anomalies
(Source: National Oceanic and Atmospheric Administration, USA)

Figure 1    Sea surface temperature anomalies of 1 – 28 October 2017 in degree Celsius.


1. The next update will be available in the latter half of December 2017.

Related links:
What are El Niño, La Niña, ENSO?
The impact of El Niño and La Niña on the climate of Hong Kong
Seasonal and annual rainfall charts
Blogs relating to El Niño/La Niña
References on El Niño and La Niña
Seasonal forecastAnnual outlookClimate change

For further information on this webpage, please contact Mr. F C Sham (tel:2926 3102,