The main characteristics of the atmospheric circulation in the Northern Hemisphere in winter (from December 2022 to February 2023) 2022 are as follows. The polar vortex is characterized by a dipole type and three-wave mode in the middle and high latitudes, and the troughs and ridges in the westerlies are significantly stronger than the historical average. One tropical cyclone is generated over western North Pacific and the South China Sea and 11 tropical cyclones over the world’s other oceans. There are 15 gale processes (above Beaufort scale 8) over offshore areas of China, including 10 produced by cold air, two by extratropical cyclones, two under both, and one by cold air and tropical low system. Seventeen rough sea wave processes (above 2.0 m) are observed in China’s offshore areas. Four large-scale sea fog processes occur in offshore areas, mainly in the Bohai Sea, the Bohai Strait, the Yellow Sea, the Beibu Gulf, the Qiongzhou Strait, and coastal waters of Leizhou Peninsula. The sea surface temperature (SST) has an overall trend of decrease, while the decrease rate in the northern seas is larger than that in the southern seas; the SST difference in winter from north to south increases from 26 ℃ in December 2022 to 30 ℃ in February 2023.