The 1989～1991 autographic records of wind from 32 weather stations in Shandong Peninsula are used to invedtigate the features of sea-land breeze circulation,including the frequency and vigor of the winds,transition intervals of both,horizontal/vertical scales.Evidence shows that with the sea breeze prevailing,a convergent zone occurs in the central Peninsula,often accompanied by showers and thunderstorms that are sometimes responsible for intensely convective weather.