Abstract: Primary production refers to estimation of the ability of an ecosystem to fabricate, at the expense of external energy both radiant and chemical, primary organic compounds of high chemical potentials for further transformation and flow to higher system levels. In the present investigation the light dark oxygen method was followed in order to assess the of primary productivity of Bay of Bengal at Chandravaga, Konark, Odisha, Seasonally, the maximum Gross Primary Production and Net Primary Production were recorded in summer due to clear weather and high atmospheric temperature and minimum during Monsoon season due to cloudy weather . On the other hand, Community respiration was found to be higher during summer season and lower during winter season.