thumb|North Atlantic currents
The Portugal Current is a weak ocean current that flows south along the coast of Portugal and the Iberian Peninsula. Some publications define this current as part of the Canary Current, while others distinguish it as a separate current.
The Portugal Current system is supplied mainly by the intergyre zone in the Atlantic, a region of weak circulation between the North Atlantic Current to the north and the Azores Current to the south. It is estimated, on average, to extend about 300 km beyond the shelf. although upwelling can occasionally occur in downwelling-favourable months and vice versa, mainly due to wind variability. and 1980s, but is now only limited to waters off northern Portugal, providing further support to the notion of a reduction of kelp forests along the Iberian Peninsula. This increase in temperature is correlated with the decrease in the intensity of upwelling events from 1941 onwards, reducing the input of nutrient-enriched waters into the coast. Warm water species are colonizing new areas northwards while cold water species are shifting polewards, like the rustic limpet (Patella rustica).