Guangdong faces the South China Sea to the south and has a total of 4,300 km of coastline. Leizhou Peninsula is on the southwestern end of the province. There are a few inactive volcanoes on Leizhou Peninsula. The Pearl River Delta is the convergent point of three upstream rivers: the East River, North River, and West River. The river delta is filled with hundreds of small islands. The province is geographically separated from the north by a few mountain ranges collectively called the Southern Mountain Range. The highest peak in the province is Shikengkong 1,902 meters above sea level.
Cities around the Pearl River Delta include Dongguan, Foshan, Guangzhou, Huizhou, Jiangmen, Shenzhen, Shunde, Taishan, Zhongshan and Zhuhai. Other cities in the province include Chaozhou, Chenghai, Kaiping, Nanhai, Shantou, Shaoguan, Xinhui, Zhanjiang, Zhaoqing, Yangjiang and Yunfu.
Guangdong has a humid subtropical climate, with short, dry, mild, winters and long, hot, wet summers. Average daily highs in Guangzhou in January and July are 18 °C (64 °F) and 33 °C (91 °F) respectively, although the humidity makes it feel much hotter in summer. Frost is rare on the coast but may happen a few days each winter well inland.