According to scientists, in the past 50 years climate has changed rapidly, which should include warming of the ocean world. In Vietnam, sea level monitoring data in marine-coastal stations show trend changes in average sea levels are not the same through coastal areas. Most of these stations tend to increase, however, a few stations did not clearly reflect this trend. Changing tendency average of sea level along the coast Vietnam is about 2.8mm per years. In this research, the authors focus on the changing of temperature, rainfall, tropical hurricane, flood and drought in coastal areas of Vietnam. Theses factors are reasons for rising sea level. Sea level rising in coastal Vietnam affect to human life, social-economic developmental activities. especially agricultural production. Therefore, the research and forecast sea level rise and identify risk areas for future is essential.