The best time to visit Busan is during May, June, July and also in September. These can be considered as the peak time for visiting Busan. January is quite cold in the city, but because of the new year celebrations, people do flock the place. Spring brings colour to the city of Busan as the flowers bloom, and the official cherry blossom season starts. If you are interested in visiting a crowd-free Busan, then target the beginning of April for a visit. Spring in Busan begins in March and lasts till the beginning of May. This is the time when the temperature rises, and by the end of May, it does become warm. Spring is when you can sit by the beach and enjoy the weather. Summer rolls in May and lasts till mid-October. Summer in Busan gets hot and sunny, and it isn't the best time for outdoor activities. It is an excellent time for beach activities and nightlife. By August, the climate starts getting colder which brings in the Autumn season that lasts till November. The time from October to December is treated as the shoulder season for tourism in Busan. The weather is soothing, and it is a fantastic time for outdoor activities such as hiking, biking and even for walking around the city and in the outskirts. The winters begin in November which is considered mostly as the offseason which lasts till March when it's cold and freezing. It isn't a good time to visit Busan. As it rains sporadically throughout the year, it's advised to carry Umbrellas at all times.