The National Marine Environmental Forecasting Centre has found the temperature of the central and eastern tropical Pacific was neutral this spring, predicting it will turn warm in summer and is likely to develop an El Nino.
El Nino is caused by interactions between the ocean and the atmosphere.
It is characterised by unusually high ocean surface temperature in the central and eastern tropical Pacific Ocean. Developing countries dependent upon agriculture and fishing, are the most affected.
Chinese experts said the summer monsoon in East Asia this year will be a little stronger than average, which will push western Pacific subtropical high northward and eastward, state run Xinhua news agency reported.
Two rain bands are likely to appear in this situation.
Experts said ocean temperature of Bohai Sea, north of the Yellow Sea and south of the South China Sea will be lower than the same period of the normal years.
The ocean temperature of China's other sea areas will be higher, they said.
El Nino last affected Indias monsoon in 2009, reducing the output of summer sown crops such as rice and sugarcane and pushing up food prices.