Is it cold to cruise the Pearl River at night in May?

Not cold. In May, the Pearl River temperature in Guangzhou 16 -30 degrees, and the average night temperature on the Pearl River ship 18 degrees. The weather is cool and the temperature is suitable. Just wear short sleeves and you won't feel cold. The Pearl River is a composite water system consisting of Xijiang, Beijiang, Dongjiang and Pearl River Delta rivers. Originated in the upper reaches of Xijiang River and Maxiong Mountain in Wumeng Mountain System of Yunnan-Guizhou Plateau.