"The weather in the area of operations continues to be very difficult," Navy Admiral Gabriel Gonzalez said on Sunday.
"Right now, we have waves of six to eight metres high with west to southwest winds of 40 knots, and unfortunately it appears that these conditions will remain for the next 48 hours," he said.
Adml. Gonzalez added that the search for the vessel was further complicated by the fact that it has "very little visual area" from the surface, making it difficult to detect.
The Argentine navy says the missing diesel-electric submarine has enough oxygen, food and water to last at least two weeks.