The won was quoted at 1,132.9 to the dollar at the conclusion of onshore trade, up 0.2 percent compared to Wednesday's close of 1,135.2.
South Korean shares rose, mainly due to foreigners being net buyers for a seventh straight day.
The Korea Composite Stock Price Index (KOSPI) closed up 0.8 percent at 2,022.10 points.
On Thursday, foreigners were net buyers of 157.8 billion won ($139.44 million) of shares.