, 1954) Pingtan County has a total land area of , comprising 126 or 72% of the county's land area, and is the largest island in all of Fujian.
Niushan Island is located in the eastern part of the county. To the east is the Taiwan Strait. The area is the closest place in mainland China (PRC) to the main island of
Taiwan.
Climate Pingtan, by virtue of its maritime location, has a moderated climate, with high humidity and minimal
diurnal temperature variation. Under the
Köppen climate classification, it has a
humid subtropical climate (
Cfa), with mild winters and hot, humid summers, though much cooler than inland places. The monthly daily average temperature ranges from in February to in July. The bulk of the rainfall annually occurs in spring and early summer, while autumn and early winter is the driest time of the year. The area experiences windy weather, with an average wind speed of , and wind directions are consistent. Freezing temperatures have never been recorded here. on January 31, 1977 to in August 1966. {{Weather box Jul, Aug and Sep Record highs ==Administrative divisions==