Cape Anguille

If they had a dark colour to them, there was rain coming.

He would also look north to Cape Anguille shoreline, and there were signs within that that he would identify bad weather as well.

So...

There was a certain way things looked within his surroundings, around his environments, certain land features that he looked at that gave him the indication that bad weather was coming.

For a week, Cartier and his men lay off the coast.

The headland of Cape Anguille marks the approximate southward limit of their exploration.

Great gales drove the water into a swirl of milk-white foam among the rocks that lined the foot of this promontory.

beyond this point they saw nothing of the newfoundland shore except that as the little vessels vainly tried to beat their way to the south against the fierce storms the explorers caught sight of a second great promontory that appeared before them through the mist this headland cartier called cape st john In spite of the difficulty of tracing the storm-set path of the navigators, it is commonly thought that the point may be identified as Cape Anguille, which lies about 25 miles north of Cape Ray, the southwest corner of Newfoundland.

Had Cartier been able to go forward in the direction that he had been following, he would have passed out between Newfoundland and Cape Breton Island into the open Atlantic, and would have realized that his new land was, after all, an island, and not the mainland of the continent.

But this discovery was reserved for his later voyage.