Seoul weather in August
“Mild and bright — an underrated time to visit.”
Roughly 15 rainy days across the month, on average.
August in Seoul is hot and humid with average highs of 29.2°C (85°F) and lows of 22.4°C (72°F). Expect significant rainfall—around 262mm spread across roughly 15 rainy days—making this the wettest month of the year. Despite frequent showers, you'll still get about 9 hours of sunshine daily. The combination of heat, humidity, and moisture creates a distinctly tropical atmosphere that can feel intense for unprepared visitors.
This is peak summer in Seoul, and the city takes on a quieter character as locals escape to coastal resorts and mountain retreats. Major festivals and outdoor events often pause during August's heat. Tourist crowds remain moderate to high, though fewer international visitors brave the weather compared to spring or autumn. The humidity can make sightseeing challenging during midday hours, but evenings cool slightly and are more pleasant for exploration.
If you're considering Seoul in August 2026, come prepared for wet weather and heat. Pack light, breathable clothing and waterproof gear. Early mornings and late afternoons are ideal for outdoor activities. This month suits travelers who don't mind the weather trade-off and want to experience Seoul's local summer culture, including street food festivals and evening riverside walks.
The city is split by the Han River and the neighborhoods have deep rivalries — Gangnam is nouveau-money, Gangbuk (Jongno, Ikseon-dong) is old-money and old-Seoul. Naver Maps works, Google Maps doesn't (Korean law blocks foreign mapping). Order at pojangmacha street tents late night in Jongno for sundae blood sausage and soju. The escalator etiquette is stand right, walk left, but on Seoul subway it's stand both sides — a Busan person will get annoyed.
What to pack for Seoul in August
August's heat and humidity demand lightweight, moisture-wicking fabrics. Rain is frequent and unpredictable, so waterproof layers are essential. Prioritize breathability and quick-dry materials to stay comfortable throughout the day.
- Lightweight rain jacket or poncho
- Moisture-wicking t-shirts and tank tops
- Linen or cotton shorts and capris
- Waterproof crossbody bag or backpack cover
- Comfortable walking sandals with grip soles
What to pack for Seoul in August
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Where to stay in Seoul
We don't review individual hotels — plenty of people do that well. What we do is send you to compare rooms in Seoul across trusted platforms.
Compare hotels on Booking.com→Estimated August trip to Seoul
Peak season prices — book early or shift by 2–3 weeks to save. Rule-based estimates from a couple based in London — actual prices vary.
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Delayed flight to Seoul?
August sees 262mm of rain here — delays happen. Check if you're eligible for compensation. EU regulations cover flights departing from or arriving in the EU/UK.
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Things worth doing
Visit Bukchon Hanok Village early morning, explore Myeongdong shopping district, take a Han River night cruise, relax at jjimjilbangs (Korean spas) to escape the heat.
August vs. the rest of the year
How this month compares in Seoul. Tap any month to read more.
highlighted months are among the best time to visit.
Best time to visit Seoul
While August has its own character in Seoul, the data-backed best months to visit Seoul are April, October. These months combine the most favourable temperatures, rainfall, and sunshine across an 11-year climate record (2015–2025).
See the full best-time-to-visit guide for SeoulOther places with a similar climate right now
Seoul in August — FAQ
Q01Is August a good time to visit Seoul?
Is August a good time to visit Seoul?
It is a challenging month — you may want to consider another time of year. In August, Seoul averages a high of 29°C (85°F) and a low of 22°C (72°F), with 262mm of rainfall across roughly 15 rainy days. Mid-April cherry blossoms line the Yeouido Yunjungno road and the Han River picnic season officially opens with chimaek (chicken and beer) delivery from tents.
Q02What is the average temperature in Seoul in August?
What is the average temperature in Seoul in August?
The average high temperature in Seoul during August is 29°C (85°F), with an average low of 22°C (72°F). These figures are averaged from 11 complete years of daily records (2015–2025, Open-Meteo Archive). August humidity hits 90% at 33C; locals escape to the Cheonggyecheon stream downtown where air-conditioned underground shopping tunnels connect for miles.
Q03How many rainy days does Seoul have in August?
How many rainy days does Seoul have in August?
Seoul averages approximately 15 rainy days in August, with a total monthly rainfall of about 262mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days. Late June through July jangma monsoon dumps 400mm; the Han rises past cycling paths and Gangnam intersections flood, stranding buses for hours.
Q04What should I pack for Seoul in August?
What should I pack for Seoul in August?
For Seoul in August, pack light, breathable clothing (cotton or linen), a compact umbrella or waterproof jacket, sunscreen and sunglasses, comfortable walking shoes. These recommendations are based on 11 complete years of weather averages for this specific month. A folding fan (buchae) — locals of all ages carry one in summer and consider hand-fanning strangers a small kindness on packed subways.
Q05How crowded is Seoul in August?
How crowded is Seoul in August?
Tourist crowds in Seoul during August are typically moderate. Consider this when planning accommodation — prices track crowd levels closely. The city is split by the Han River and the neighborhoods have deep rivalries — Gangnam is nouveau-money, Gangbuk (Jongno, Ikseon-dong) is old-money and old-Seoul. Naver Maps works, Google Maps doesn't (Korean law blocks foreign mapping). Order at pojangmacha street tents late night in Jongno for sundae blood sausage and soju. The escalator etiquette is stand right, walk left, but on Seoul subway it's stand both sides — a Busan person will get annoyed.