At a Glance
Compared to this destination's peak season Quiet in the city over Chuseok, 14 to 16 September 2027, when residents leave and the roads out are jammed; the fireworks night and art week are busy, and the month builds towards October’s high season.
Seoul in September — Travel Guide
By Harry Nara · Last updated
Seoul in September offers some of the best conditions of the year, ideal for heritage, art lovers & walkers. Expect temperatures of 18–26°C, around 7 days of rain, and medium crowds across the city. Daily budgets typically land around ₩85,000–145,000 for mid-range travellers. Book three to four weeks ahead for the best mid-range rates and the widest hotel choice.
Contents15 sections
#Weather in Seoul in September
Seoul in September averages 18–26°C (64–79°F) with around 7 days of rain, and crowds are medium.
| Measure | September in Seoul |
|---|---|
| Daytime high | About 26°C / 79°F |
| Overnight low | About 18°C / 64°F |
| Wet days | About 7, with about 142mm of rain, most of it early in the month |
| Sunset | 7:02pm on the 1st; 6:18pm by the 30th |
| Big dates | Chuseok, Tuesday 14 to Thursday 16 September 2027; the fireworks festival and the art fairs, dates to be announced |
| Crowds and prices | Quiet in the city over Chuseok, busy on the roads out; building towards October |
Figures are Korea Meteorological Administration 1991–2020 normals for Seoul.
What that actually means for your trip:
- Summer lets go during the month. The first week can still be hot and humid; by the second half the air dries out and the highs settle in the mid-20s.
- The rain front-loads. Early September carries most of the month's rain and the tail of the typhoon season; most typhoons weaken or pass elsewhere, but now and then one sweeps north with gales and a downpour.
- The evenings come back. After a sticky summer, the evenings in the second half are comfortable for walking and eating outside.
- The days shorten fast. Sunset moves from about seven to a quarter past six.
Is September a good time to visit Seoul? Yes, especially the second half: clear, dry days, comfortable evenings, and rates below October's peak. Plan around Chuseok, the harvest holiday, from 14 to 16 September 2027: Seoul itself is quiet and the palaces hold events, but trains and flights around it are full and dear, and some shops and restaurants close.
#September in the city
Chuseok, the harvest holiday, runs from Tuesday 14 to Thursday 16 September 2027, with Chuseok itself on the 15th, the full moon of the eighth lunar month. Families travel to their home towns, so Seoul empties, the roads and trains out are packed, and many small shops and restaurants close for the three days. The palaces and folk museums hold traditional games and performances, and in 2026 the four main palaces and Jongmyo Shrine opened free for the holiday.
The Seoul International Fireworks Festival over Yeouido Hangang Park has moved from early October to September: it was held on 27 September 2025 and 5 September 2026. Each year's date is announced over the summer, the riverbank spots fill by mid-afternoon, Ichon Hangang Park, across the river, is the calmer place to watch.
The art fairs fill early September with Seoul's art week, when galleries across the city open new shows.
Frieze Seoul, held alongside Kiaf Seoul at COEX since 2022, is moving to the Dongdaemun Design Plaza for its 2027 edition; check the fairs' dates.
#What to Do in Seoul in September
Solo Travellers
Spend art week in the galleries of Samcheong-dong and Hannam, walk the Seoul City Wall on one of the first clear days, and watch the harvest moon rise from Namsan on Chuseok night.
Couples
Book an evening palace opening, sold online in autumn, and walk Gwanghwamun and the palace walls after dark. On the fireworks night, find a riverside restaurant on the south bank.
Families
The palaces and Namsangol Hanok Village run traditional games over Chuseok, from tuho, arrow-throwing into a pot, to jegichagi, a shuttlecock kicked with the foot. The Hangang parks are good for bikes and picnics once the heat breaks.
Groups
Hike Inwangsan or Bugaksan on a clear weekend morning, then eat in the restaurants of Seochon.
In the evening, the pavement bars of Euljiro are at their best in the second half of the month.
#Getting Around
Arriving at Incheon, take the AREX into Seoul Station and buy a T-money card for the subway and buses. September is the month walking across the city becomes pleasant again: Seoullo 7017, the garden walkway on an old overpass by Seoul Station, links on foot to Namdaemun Market.
Over Chuseok, getting around Seoul is easy, but anything leaving the city needs booking far ahead, and the roads out are jammed on the first day of the holiday.
#Budget & Costs
| Travel style | Per day | What it covers |
|---|---|---|
| Budget | ₩80,000–125,000 | Guesthouse, markets and set lunches, subway |
| Mid-range | ₩200,000–330,000 | A central hotel, Korean barbecue, palace tickets |
| Luxury | ₩580,000+ | A luxury hotel by the Han, fine dining, an art-week tour |
September prices depend on Chuseok: transport out of the city and flights are dear that week, while Seoul hotels can be reasonable. The rest of the month is moderately priced, rising towards October.
Costs worth knowing:
| What | Price |
|---|---|
| Fireworks festival | Free to watch |
| Palaces over Chuseok | Free in 2026; check 2027 |
| Songpyeon from a rice-cake shop | Sold by the box or the piece |
| Namsan on Chuseok night | Free, by foot or bus |
| Art fair day ticket | Priced by the fairs, dearer at weekends |
- Book transport for Chuseok as soon as sales open.
- Come in the second half for the best weather.
- Check the K-ETA rules for 2027 before you travel.
#Food & Dining
Chuseok food is songpyeon and jeon, slices of fish and vegetables pan-fried in egg batter. September is also the start of the harvest: new-crop rice, pears and the first chestnuts fill the markets, and Gwangjang Market's stalls are comfortable again once the humidity lifts.
#Nightlife
As the evenings cool, Seoul goes back outside: the pavement bars of Euljiro, the riverbanks, and the rooftops of Itaewon and Seongsu are at their best in the second half of the month. Over Chuseok, residential areas are quiet, but the centre carries on.
#Shopping
In early September the department-store food halls stack up with Chuseok gift sets of pears, beef, ginseng and dried fish, beautifully wrapped, autumn collections arrive, and Insadong is good for traditional gifts.
#Culture & Etiquette
- Bring a small gift if you are invited into a Korean home over Chuseok, and take your shoes off at the door.
- Accept food and drink with two hands.
- Ask before photographing families in hanbok at the palaces.
- Check opening days over the holiday: many small businesses close.
#Essential Local Phrases
| Korean | Meaning | When to use |
|---|---|---|
| 추석 (chuseok) | The harvest holiday | On closure notices in mid-September |
| 즐거운 추석 보내세요 (jeulgeoun chuseok bonaeseyo) | Have a happy Chuseok | To anyone before the holiday |
| 송편 (songpyeon) | Half-moon rice cakes | In the bakeries before Chuseok |
| 태풍 (taepung) | Typhoon | On the early-September forecast |
| 불꽃축제 (bulkkot chukje) | Fireworks festival | On the posters by the river |
| 선물 세트 (seonmul seteu) | Gift set | In the department-store food halls |
#Packing List
- Light clothes for the early month, and a layer for cooler evenings
- A compact umbrella for early-month rain
- Comfortable walking shoes
- Light hiking shoes for the city wall and Inwangsan
- Sunscreen and sunglasses
- A small gift, if you might visit a Korean home at Chuseok
- A power bank for the fireworks night
#Backup Plans
If a typhoon or heavy rain arrives: go to the modern art museum by Gyeongbokgung, MMCA Seoul, and the small galleries of Samcheong-dong around it.
If restaurants are closed for Chuseok: eat in the centre, around Myeongdong, Jongno and the hotels, where most places stay open.
If the fireworks crowd is too much: watch from Ichon or from a riverside restaurant, or skip the evening and go to Namsan.
#Safety & Health
Early September can still be hot and humid, so the summer precautions apply until the air dries. If a typhoon approaches, follow the emergency alerts and stay indoors while it passes. On the fireworks night, crowds of about a million pack Yeouido; pick a meeting point before the show.
Emergency: 119 for fire and ambulance, 112 for police, and 1330 for the travel hotline.
#What's New for September 2027
- Chuseok runs from Tuesday 14 to Thursday 16 September 2027
- The Han fireworks were held in September in 2025 and 2026; the 2027 date comes in the summer
- Frieze Seoul moves to the Dongdaemun Design Plaza for 2027
- The palaces opened free over Chuseok in 2026
- The K-ETA exemption for many nationalities ran to 31 December 2026; check the 2027 rules
#About This Guide
By Harry Nara (founder of WhenToWander), updated October 2026 for September 2027. Climate figures are Korea Meteorological Administration 1991–2020 normals for Seoul. Dates and prices verified against:
- Korea AeroSpace Administration for the 2027 Chuseok dates
- Hangang Parks for Yeouido and the fireworks
- Frieze Seoul for the art fair
- Royal Palaces for holiday events and evening openings
- Korea Meteorological Administration for the September averages
For the month before, see Seoul in August, and for the month after, Seoul in October.
You might also like
Destinations picked for travellers with similar taste or climate.
Frequently Asked Questions
When is Chuseok in 2027?
The holiday runs from Tuesday 14 to Thursday 16 September 2027, with Chuseok itself on the 15th. Transport out of Seoul is packed and many small shops close for the three days, while the city’s streets and sights are unusually quiet and the palaces hold traditional events.
Are the palaces open over Chuseok?
Usually, yes, with traditional games and performances, and in 2026 the four main palaces and Jongmyo Shrine opened free for the holiday. Check the 2027 arrangements before you go, as the normal closing days, Tuesday for Gyeongbokgung and Monday for most others, can shift around the holiday.
Are there typhoons in Seoul in September?
Early September is the tail of the typhoon season. Most typhoons weaken or pass elsewhere, but one can bring wind and heavy rain to Seoul for a day or two. Keep an indoor plan for the first half of the month, and follow the emergency alerts if a storm approaches.
When is the Seoul fireworks festival in 2027?
The 2027 date had not been announced at the time of writing. The festival over Yeouido Hangang Park was held on 27 September 2025 and 5 September 2026, after years in early October, and the date is usually announced in the summer. It is free, and the riverbank fills by mid-afternoon.
What’s the weather like in Seoul in September?
Seoul in September typically sees temperatures of 18–26°C with around 7 days of rain across the period. Pack lightweight layers that suit both cooler mornings and warmer afternoons.
How much does it cost to visit Seoul in September?
Budget-conscious travellers can expect daily costs of ₩85,000–145,000, covering accommodation, food, and local transport. Flexible dates can save up to 20% compared with peak-week rates.