The essentials
When to go to South Korea, in brief
Late September to mid-November: the sweet spot
Dry air, 15-22ยฐC, low rainfall and red-and-gold foliage everywhere. The most beautiful season, mild and luminous.
Cherry blossom spring
Bloom from late March (Jeju, Busan) to early April (Seoul). The south flowers first. The Jinhae festival runs late March to early April.
The summer monsoon (jangma)
From late June to late July, most of the year's rain falls. Seoul can receive over 400 mm in July alone.
Late-season typhoons
Typhoon risk runs July to September, mostly on the South and Jeju. On average one passes near the country each year.
Cold, dry winter
Seoul drops to around -5ยฐC in January, with frequent snow. Dry and sunny, it is the season for skiing and snow-dusted palaces.
Festivals to plan around
Jinhae cherry blossoms (April), Boryeong Mud Festival (July), Busan Fireworks (autumn) and the Seoul Lantern Festival (November).
The verdict
The best periods
Late Sept - mid-Nov
Dry, mild and luminous. The prime window for Seoul, palaces, temples and hikes among the foliage. Book 2 to 3 months ahead.
Late March - June
Cherry blossoms late March to April, mild spring in May. June stays pleasant before the monsoon, with heat building.
July - August
Monsoon in July, heavy humid heat in August, typhoon risk. Intense rain and overcast skies.
Month by month
The full calendar
Tap a month for the detailed guide: weather by region, where to go, festivals.
-6 to 2ยฐC
Cold, dry, snow, ski
-4 to 4ยฐC
Cold, dry, Seollal
2 to 11ยฐC
Spring, late-month bloom
8 to 18ยฐC
Cherry blossoms, mild
14 to 23ยฐC
Mild, dry, luminous
18 to 27ยฐC
Hot, first rains
22 to 29ยฐC
Monsoon (jangma)
23 to 30ยฐC
Hot, humid, typhoons
18 to 27ยฐC
Heat eases, typhoon risk
10 to 21ยฐC
Foliage, dry
3 to 13ยฐC
Foliage, crisp and dry
-3 to 5ยฐC
Cold, dry, winter
Climate
Climate by region
| Region | Dry season | Wet season | Verdict |
|---|---|---|---|
| Seoul & Central | Apr-May and Oct-Nov: mild, dry | Jul: monsoon (400 mm+); Dec-Feb: cold dry, snow | Ideal Apr-May & Oct-Nov |
| Busan & southeast coast | 2-3ยฐC warmer than Seoul, mild winters | Jul-Sept: rain and typhoons; pleasant summer sea | Ideal May-June & Sept-Oct |
| Jeju Island | The warmest, near-subtropical climate | Very wet May-Oct (up to 300 mm+/month) | Ideal Apr-May & Oct-Nov |
| Mountains (Seoraksan, Gangwon) | Cooler, early foliage in October | Dec-Feb: heavy snow (ski resorts) | Ideal Oct (foliage) & Dec-Feb (ski) |
Calendar
The key events of the year
Seollal (Lunar New Year)
One of the country's biggest family holidays. Cities empty out as millions of Koreans return to their hometowns. Many shops close.
๐ฐ๐ท Nationwide
Jinhae Cherry Blossom Festival
Korea's cherry blossom capital: over 350,000 trees in bloom along streets and canals, near Busan.
๐ฐ๐ท Jinhae (Changwon)
Boryeong Mud Festival
One of the biggest summer festivals: mud baths, slides and concerts on Daecheon Beach, 2.5 hours from Seoul.
๐ฐ๐ท Boryeong
Busan Fireworks Festival
Over a million spectators on Gwangalli Beach for a pyrotechnic show synchronized with music and lasers.
๐ฐ๐ท Busan
Seoul Lantern Festival
Hundreds of lanterns light up the Cheonggyecheon Stream in the heart of the city, in the thick of foliage season.
๐ฐ๐ท Seoul
Our analysis
South Korea reads to the rhythm of its four distinct seasons. Two windows stand out clearly: autumn, from late September to mid-November, and the cherry blossom spring, from late March to April. In between, summer calls for patience and winter for warm clothes.
Autumn, from late September to mid-November
This is the prime window. The air turns dry, temperatures soften (15 to 22ยฐC by day) and the foliage sets the country ablaze in red, orange and gold. The colors start at altitude, in the Seoraksan and Gangwon ranges from early October, then descend toward Seoul and the south through mid-November. It is the ideal time to combine palaces, temples, hikes and cities under a beautiful light. Book two to three months ahead for peak weekends.
Cherry blossom spring
From April to May, the country comes back to life. The cherry blossom bloom begins in late March in the south (Jeju, Busan) and reaches Seoul in early April. The Jinhae festival, near Busan, is one of the most spectacular, with its hundreds of thousands of trees in bloom. May extends the season with a mild, dry climate, perfect for exploring without the cherry-blossom crowds.
Summer: monsoon and typhoons
From late June the jangma sets in, the Korean monsoon, which concentrates most of the yearโs rain through late July. Seoul can receive over 400 mm in July alone. August stays hot and heavy (up to 30ยฐC), with a typhoon risk that runs into September, mostly on the South and Jeju Island. It is the hardest stretch for a first trip.
Winter, cold but dry
From December to February, the mercury drops to around -5ยฐC in Seoul in January, with regular snowfall. The climate stays dry and often sunny. It is the season for skiing in the Gangwon resorts, snow-dusted palaces and winter markets. Busan, on the southeast coast, and Jeju, almost subtropical, stay much milder: good options to escape the deep cold of the center.
FAQ
Frequently asked questions
When is the best time to visit South Korea? +
From late September to mid-November: dry skies, 15-22ยฐC, low rainfall and blazing autumn foliage. It is the prime window, just ahead of cherry blossom spring.
What is the worst time to visit South Korea? +
July and August: the monsoon (jangma) concentrates most of the rain in July, the air turns heavy and humid in August, with a typhoon risk. It is also the hottest stretch.
When can you see the cherry blossoms in South Korea? +
From late March to mid-April. The south flowers first: Jeju and Busan from late March, Seoul in early April. The Jinhae festival, near Busan, runs late March to early April.
When can you see the autumn foliage? +
From October to mid-November. The colors start in the mountains (Seoraksan, Gangwon) in early October, then move down to Seoul and the south through mid-November.
Can you visit South Korea in winter? +
Yes. Winter is cold (around -5ยฐC in Seoul in January) but dry and often sunny. It is the season for skiing, snow-dusted palaces and a wintry atmosphere, as long as you wrap up well.
When is Seollal in 2026? +
From 17 to 19 February 2026. It is the Lunar New Year, one of the country's biggest holidays. Transport is packed and many shops close for a few days.
Do you need to book far ahead? +
For autumn (October-November) and cherry blossom season (April), yes: book flights and hotels two to three months ahead, especially around peak-bloom weekends and foliage peaks.
Marie Laurent ยท Southeast Asia specialist
Updated June 22, 2026
Go further
Plan your trip to South Korea
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