Welcome to autumn in Korea! You’ve made it through the hot, wet summer of 2025 and it’s all blue skies… at least once the temperature cools down and the humidity drops a bit lower. We might still have a bit of lingering summer heat, but September is the start of one of Korea’s most beautiful seasons.
The Weather
September is the start of autumn in Korea, but it’s just the start. Early September is still hot and humid with the occasional rains to sweep through the country. You’ll want to dress cool for the day, but make sure to keep a cardigan or light sweater handy for cool evenings or going onto public transportation or into shops (which can have the AC on high).
The beginning of the month will be as high as 33oC (91.4oF) during the day and up to 25oC (77oF) at night. But it’ll start to cool off after the third week when temperatures drop to 26oC (78.8oF) during the day and as low as 13oC (55.4oF) at night.
What to Wear
The humidity in Korea will drop faster than the temperature, so expect scorching hot temperatures during the first half of the month. We’d recommend keeping your summer staples in rotation like light t-shirts, airy blouses, and breathable dresses. But having a light jacket, cardigan, or overshirt to throw on will be key for the occasional chilly morning or evening. There are also a few storms expected, so be sure to keep a small umbrella handy.
During the second half, the temperature will begin to drop more into those traditional autumn vibes and it’ll be cardigan/light sweater weather before you know it. So make sure to dress warm because the nights will be chilly.
EVENTS
F/W Seoul Fashion Week
- When: September 1 ~ 7, 2025
- Where: Multiple locations
Seoul Fashion Week kicks off from the beginning of the month with multiple brand shows, runways, presentations and more filling the first week of September. Most of the shows are invite-only, but there are plenty of showcases and pop-ups that are open to the public.
Check out SFW’s homepage and schedule for a list of events and locations.
Changgyeonggung Moonlight Tour
- When: September 3 – 28, 2025
- Where: Gyeongbokgung Palace (Naver Map, Google Maps)
- Price: 3,000 KRW
Gyeongbokgung Palace is open for their moonlight tours which keeps the palace open at sunset into the night for some amazing photos and views of the palace lit at night. And, at 3,000 KRW, it’s more than worth every penny.
Seokjojeon at Night
- When: September 10 – October 26, 2025
- Where: Deoksugung Palace (Naver Map, Google Maps)
- Price: 26,000 KRW
Seokjojeon is located in Deoksugung Palace across the street from Seoul City Hall. It is a western-styled structure built by Emperor Gojong, the last imperial ruler of Korea. The Seokjojeon at Night event features a tour of the grounds which includes original furniture from the Empire of Korea and a light history lesson. The real highlight is sitting on the terrace with tea and live music. It is an absolutely awesome experience that everyone should experience. Check out this site for more details.
Gyeongbokgung Starlight Tour
- When: September 3 – 28, 2025
- Where: Gyeongbokgung Palace (Naver Map, Google Maps)
- Price: 3,000 KRW
Gyeongbokgung Palace is open for their moonlight tours which keeps the palace open at sunset into the night for some amazing photos and views of the palace lit at night. And, at 3,000 KRW, it’s more than worth every penny.
Check out our blog post for more details.
Seoul Light DDP
- When: August 28 ~ September 7, 2025 (8 PM – 10 PM)
- Where: Dongdaemun Design Plaza (Google Maps, Naver Map)
The DDP is continuing their nightly multimedia lightshows with an autumn edition for the beginning of September. This session is only slated for just over a week, so you should head over quick if you want to see it. For more information, check out the DDP’s event page.
SEOULDAL
- When: Until November 30, 2025 (closed Mondays)
- Where: Yeouido Park (Naver Map, Google Map)
- Price: 25,000 KRW (adults)
SEOULDAL is a hot-air balloon located in Yeouido that offers the absolute best views of the city. The experience takes you 120 meters into the air and far above any of the surrounding buildings giving you a bird’s eye view of the city and the Han River.
The experience is available every day (except Mondays) from 10 AM to 10 PM on weekends and 12 PM to 10 PM on weekdays. We recommend timing it with sunset at 7 PM to get some incredible views of the city bathed in the golden light of the setting sun.
You can also book your tickets in advance through KLOOK for 17.99 USD.
Hangang Drone Light Show
- When: September 6, 13, 20, 26 (7 PM – 9:45 PM)
- Where: Ttukseom Hangang River Park (Naver Map, Google Maps)
The Drone Light Show is back with four more shows planned for the fall season. Each session will include a cultural arts performance at 7 PM followed by the drone light show at 8 PM and then another performance at 8:15 PM.
These events draw huge crowds so be sure to get there earlier if you want to get a good spot to watch the show from.
Seoul POPCON
- When: September 12 – 14, 2025
- Where: COEX (Naver Map, Google Maps)
- Price: 28,000 KRW (one-day tickets)
Seoul POPCON is basically Korea’s version of Comic Con on a slightly smaller scale. This year, we’ve got Artist’s Alley along with professional publishers and artists in attendance. The main stage will host Ben Hardy (Bohemian Rhapsody, X-Men Apocalypse) as well as the Korean cast of KPop Demon Hunters and several others.
Seoul International Fireworks Festival 2025
- When: Saturday, September 27, 2025
- Where: Yeouido Hangang Park (Naver Map, Google Maps)
The Seoul International Fireworks Festival usually takes place in October, but this year we’re having it in late September. The festival invites multiple teams from overseas countries presenting a fireworks show set to music on the Han River.
While the festival can be seen for miles around, there are also set seats on at Yeouido Hangang Park that can be reserved in advance..
Mundo Pixar: Pixar, Into the World of Imagination
- When: Until September 28, 2025
- Where: 71, Gosanja-ro, Seongdong-gu, Seoul, Republic of Korea (Naver Map, Google Maps)
- Price: Starts at 25,900 KRW
One of the biggest and best Pixar exhibits to ever visit Korea is still available until the end of the month. This exhibit takes you through the worlds of Pixar and lets you visit characters from the films. That includes Andy’s room from “Toy Story” or Carl and Ellie’s house from “Up”.
Tickets can be reserved ahead of time or you can grab tickets at the door.
Seoul International Garden Show
- When: Until October 20th
- Where: Boramae Park (Naver Map, Google Maps)
The Seoul International Garden show is fully underway at Boramae Park with 111 show gardens that have transformed Boramae Park into a massive urban garden. The show is also dotted with cafes, shops, and food trucks along with seating areas to enjoy the ambience.
We visited back in June when the Ditto Garden was fully underway. Unfortunately, that’s gone now, but we’ll always have the memories.
Sejong Summer Festival
- When: August 28 – September 1, 2025
- Where: Gwanghwamun Square (Naver Map, Google Maps)
The last weekend of August will have a bevy of live performances in Gwanghwamun Square with Sage min Swingtet, Aster&Neo, Juncoco, and 1MILLION all set to perform. All the performances will be outside in the open air, so be sure to stop by and check out the festivities. Check out the Sejong PAC page for more details.
K-Food Festival Knock Knock
- When: June 20 ~ December 31, 2025 (Friday to Sunday, 4 PM to 9 PM)
- Where: Sejong-ro Garden (Naver Map, Google Maps)
The K-Food Festival is back by popular demand! Thanks to its massive popularity with locals and tourists, the Seoul City Government will be hosting the K-food festival in the Sejong-ro Park until the end of the year. There are food trucks serving everything from Korean pancakes to Korean hotdogs from 4 PM to 9 PM every weekend (weather willing). Check out our review for even more information and photos of the ongoing festival.
Cheonggye Soul Ocean
- When: Until December 31, 2025 (6 PM ~ 10 PM)
- Where: Gwanggyo Bridge (Google Map, Naver Map)
The Cheonggyecheon Stream is literally the coolest place to escape the hustle and bustle of Seoul life and it’s right in the city’s center. By night, the entire stream comes to life with beautifully colorful lights, buskers, and locals cooling their feet in the clear waters.
Enter the Cheonggye Soul Ocean, a 40 meter light-projection show that uses six projectors to display gorgeous visuals uner Gwanggyo Bridge every night until 10 PM. For more information, check out our post.
2025 Seoul Outdoor Library
- When: Until October 10, 2025
- Where:
- Gwanghwamun Plaza (Google Maps, Naver Map)
- Cheonggyecheon Stream (Google Maps, Naver Map)
- Seoul Plaza (Google Maps, Naver Map)
In an effort to help people disconnect and leave their phone screens behind, Seoul will once again be hosting public outdoor library spaces throughout the city. Compared to last year, they’ve really upped the ante with more events, performances, and pop-ups to explore.
There will still be bean bag chairs in Gwanghwamun Plaza as well as Seoul Plaza along with seats along the Cheonggyecheon, so feel free to bring a book or borrow one from the event and take in some fresh air and dive into a good read.
Check out their page for more info.
As an added bonus, the Seoul Outdoor Library will be open at night this year until 9 PM throughout the months of June and September.
Unfortunately, the schedule of the outdoor library is a bit inconsistent so we highly recommend you check the dates of the event online before going.
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