Seoul has four genuinely distinct seasons, which is part of the appeal — the city looks and feels completely different depending on when you land. Unlike more tropical destinations, timing your trip around the seasons here isn't just about comfort, it changes what you'll actually see.
Spring (April to early May): the famous one
This is when Seoul's cherry blossoms bloom, usually peaking in the first half of April, and it's easily the most popular time to visit. Mild temperatures, low humidity, and parks like Yeouido and Seokchon Lake turn pink for about a week. Book flights and hotels well in advance — this window is short and everyone wants it.
Summer (June to August): hot, humid, and rainy
Late June through July brings the monsoon season (jangma), with heavy rain and high humidity. August is hot and sticky, often past 30°C (86°F). It's the least comfortable stretch for walking-heavy sightseeing, but also when Seoul's night markets, rooftop bars, and river parks along the Han come alive after dark, once the heat breaks.
Autumn (September to November): the local favorite
Many Seoul residents will tell you this is the best season, and it's hard to argue. Crisp air, low humidity, and vivid autumn foliage in October, especially around Namsan and the palaces. Temperatures stay comfortable for walking all day. If you only get one shot at Seoul, this is the safest bet.
Winter (December to February): cold, clear, and quiet
Genuinely cold — often below freezing — but dry and clear, with occasional snow that makes the palaces look spectacular. Fewer tourists, and this is when Seoul's café culture and indoor markets (Gwangjang, Dongdaemun) really shine. Pack proper layers; the wind off the Han River cuts.
Practical notes
- Spring and autumn are the busiest and most expensive — book 1–2 months ahead if targeting cherry blossoms or fall foliage
- A T-money card covers subway, bus, and even some taxis — get one on arrival
- Air quality can dip in early spring due to seasonal dust from the region — check daily forecasts if sensitive
The short version
Spring for the cherry blossoms, autumn for comfort and color, winter for quiet clarity and markets, summer if you don't mind heat in exchange for lower prices and lively nightlife. Seoul rewards a bit of planning around the calendar more than most cities.