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Yes, it is well known here in New England where I live that Portuguese and Basque fishermen fished seasonally in the Gulf of Maine, a large cod fishery, long before Columbus went to the Caribbean. In fact, Columbus is believed to have consulted with these men and the Portuguese navigators he hired to pilot his ships were experienced with the North Atlantic fishing routes. Note that Columbus did not want to go to the North Atlantic, but directly west, which was a new idea.
In New England there is a long estuarial spit called "Plum Island". This is where the cod fisherman used to dry their catch. They would fish for the season, dry the catch, then return home. Even today in Massachusetts and Maine there are old Portuguese families that descend from these fishermen and some are still cod fisherman today.