The spatial and temporal patterns of ocean color (i.e., chlorophyll) and sea surface temperature (SST) fronts in the coastal zone of the northwest Atlantic were studied over a 2-year period. Chlorophyll images were derived from the Sea-viewing Wide Field-of-view Sensor, while SST data were obtained from the advanced very high resolution radiometer, both flying onboard Earth-observing satellites. An edge detection algorithm was applied to each of the image sets to identify chlorophyll and thermal fronts. Persistent chlorophyll and thermal fronts co-occurred in the same vicinity of the inner/middle shelf and were spatially congruent during second (April--May--June) and third (July--August--September) quarters and least coincident during the first (January--February--March). Calculations of the frontogenesis function showed strongest frontogenic tendencies coincident with the chlorophyll and thermal fronts. A major finding of this study was the congruence of both chlorophyll and thermal fronts at a time when the coastal current jet was the most robust, strongly suggesting that it is the presence of this jet that may be a driving force in establishing these fronts. Except for a few months per year, no clear chlorophyll enhancement was observed at thermal fronts.