The won was quoted at 1,186.6 to the dollar at the conclusion of onshore trade, up 0.5 percent compared with the previous close of 1,193.0.
South Korean shares ended a bit higher on support of foreign investors' stock-buying.
The Korea Composite Stock Price Index (KOSPI) closed up 0.1 percent at 1,985.11 points.
Offshore investors bought a net 232.4 billion won ($195.95 million) worth of KOSPI shares for the day.