The best time to visit Korea is in the fall (September-November). At this time, the weather was warm, sunny, clear Blue Skies and beautiful views of the leaves. Winter is cold and dry, and a good time to visit if you are interested in winter sports because in sanaterdapat many ski resorts. Spring (April-May) is also beautiful with the cherry blossom. However, when it is very busy and you have to book early to ensure accommodation is available. Humid summer months and heat, as well as a little crowded. Also when the rainy season starts, there are so many activities that are affected by the high and low rainfall.
Those are a few information about best tourist attractions in South Korea hopefully it can help you to plan your vacation.