Using 1974-1982 hydrometeorological data on the Bohai Sea, Yellow Sea and the East China Sea.and the bulk method of Kondo,the diabatic bulk transfer coefficients in summer and winter were estimated and diatributive features of bulk transfer coefficients for sensible and latent heat and momentum fluxes at the sea surface in these areas were analyzed. The results showed that the bulk transfer coefficients in winter were greater than those in summer and also suggested that 103CD≈1.46 to 1.53；103CH≈1.25,103CH≈1.16 in the Bohai Sea;103CE≈1.25 to 1.36 in summer,and that 103CD≈1.62 to 1.69;103CH≈1.41-1.46;and 103CE≈1.46 in winter.The heat balance over the sea surface was approximated by empirical formulae.