Strong winds at sea not only pose a threat to ship navigation and coastal port facilities but also jeopardize the safety of life and property for residents in both urban and rural coastal areas. In order to reveal the patterns of strong winds at sea, continuous research is needed on its weather processes. In this article, we have compiled statistics on the strong wind weather over China’s offshore waters in the year 2023, classified them based on the weather systems (such as cold anticyclone system and typhoon), and analyzed their weather processes of each category. It was found that the occurrence of strong wind weather in China’s coastal waters is generally more common in spring and winter seasons, and the probability of strong wind weather in summer and autumn is significantly lower than that in spring and eastern seasons. This suggests that strong wind conditions in China’s offshore waters are most closely associated with the southward movement of cold anticyclone systems originating from high latitudes. During the summer, typhoons are the primary cause of strong winds, predominantly affecting the Donghai Sea and posing a significant threat to maritime vessels. This research will enhance our understanding of the characteristics of strong wind weather along China’s coastal waters, thereby improving navigation safety.