From the perspective of econometrics, the Cobb-Douglas (C-D) production function model is used to analyze the economic output elasticity of different meteorological variables to the coastal tourism in Qingdao. The results are as follows. 1) The economic output of coastal tourism is positively correlated with the number of high temperature days at 1％ level and negatively correlated with the numbers of precipitation days, fog days, thunderstorm days, and windy days at 1％ level. 2) The main impact factors are precipitation, thunderstorm, high temperature, and heavy fog weather. For every 1％ increase in the level, the elastic effect reaches -0.679％, -0.507％, 0.311％, and -0.288％, respectively. Since the 21st century, the precipitation and thunderstorm in Qingdao have present a trend of decrease, while the high temperature weather a trend of increase, which both can increase the output of coastal tourism.