On the basis of the papers of Bird and Riordan (1986), Justus and Paris (1985), Kr??el (1985, 1997) and Leckner (1978), a model of solar radiation energy input to the sea surface under real meteorological conditions has been developed. The model enables one to determine the flux or dose of total (direct + scattered) radiation within the whole visible light spectrum and any other spectrum interval in the range of 300-4000 nm. The initial data to the model are: atmospheric pressure and water vapour pressure at the sea surface and cloudiness. The seasonal mean long-term values of ozone and aerosol caused attenuation of light in the southern Baltic area were taken into account. The calculations performed for Gdynia and Hel regions are in a good agreement with the ac-tinometric data recorded in Gdynia. Therefore, the presented model could serve as a part of eco-logical model.