The main characteristics of the general atmospheric circulation in summer (from June to August) 2019 are as follows. The polar vortex was characterized by a dipole pattern in the Northern Hemisphere. The westerlies in middle and high latitudes presented a four-wave mode. The circulation in Eurasian showed a two-trough and one-ridge pattern. In June, there were many extratropical cyclones and sea fog activities in the northern sea areas of China. In July and August, the subtropical high lay more eastward and southward than ordinary years, which is not in favor of tropical cyclone genesis. There were 10 gale events stronger than 8 grade in this summer, including 6 produced by tropical cyclones, two by extratropical cyclones, and two mainly by thunderstorms; there were 14 massive sea fog events over offshore areas, including 7 in June, 4 in July, and three in August; thirteen rough sea wave events above two meters occurred, including 4 in June, 5 in July, and 4 in August. There were 10 tropical cyclones nominated over western North Pacific and the South China Sea in this summer, which was one less than the annual average; there were 14 tropical cyclones over global oceans except western North Pacific, including 4 over the North Atlantic, 9 over the East Pacific, and one over the North Indian Ocean.