A methodology for the determination of the best potential fishing zones, for sardine, in the Brazilian coastal area of the Southwestern Tropical Atlantic Ocean, between latitudes 21º45'S and 25º00'S and longitudes 40º50'W and 47º00'W is presented. By using this methodology, a fishing chart model is developed from observations relative to the months of July, August, September, November and December. Marine fishing chart containing such zones are presented for the September month. The potentiality of the VHRR-IR and the surface charts of NOAA's satellite, as a help in the determination of the fishing zones is also demonstrated.