A study was done to measure the surface ozone(O3) level during the period between June 2011 and September 2012 at Chennai, a tropical site on the south east cost of India situated at 13 degree celsius 04N 80 degree celsius 7E. Surface ozone and its variations with meteorological parameters in the urban area of Chennai were analysed through temporal pattern. The seasonal ozone showed a unique pattern attaining peak levels in summer and weakening in winter. Higher surface ozone concentrations oberved during the summer months of the present study can be attributed to the high intensity of solar radiation and high temperature levels which promote the photochemical generation of O3. The destruction of O3 is increased during the winter season as a result of scavenging of higher nitrogen oxides. Correlations were obseved and analysed to understand as to which meteorological variables influence the formation of ozone the most. Finally, hourly instantaneous values measured during daytime varied from 10 to 40 ppbv and its day average varied from 13 to 30 ppbv.