The main characteristics of the atmospheric circulation in spring (from March to May)2019 are as follows. The polar vortex was characterized by a dipole type in the Northern Hemisphere and 4-wave mode in middle and high latitudes. Two centers of low values were located in the eastern hemisphere and the western hemisphere, respectively. In March, the atmospheric circulation was in meridional pattern in middle and high latitudes of central and eastern Asia, which is favorable for the southward of the cold air. In April and May, cold air was weaker and extratropical cyclone activities increased. In spring, there were 17 gale(above 8 grade B.F.) weather over offshore areas of China, including 6 produced by cold air, three by cold air and extratropical cyclones, and 8 by extratropical cyclones which moved into the sea. Thirteen obvious sea fog processes occurred over offshore areas, including three in March, 6 in April, and 4 in May. There were 14 rough sea wave processes (above 2 m), and the wave over waters near Taiwan Strait was relatively high. No typhoon occurred over western North Pacific and the South China Sea. In addition, there were 12 tropical cyclones in other oceans of the world. The sea surface temperature in the offshore areas showed upward tendency, while the increase rate in northern seas is larger than that in southern seas.