Monsoon influence can continue into early August, followed by hot and humid late-summer conditions. Coastal and island areas are busy with domestic tourism despite the heat.
SeasonLow SeasonTemperature 22 to 31°C (72 to 88°F)Crowds LowPrices Low
High seasonShoulderLow season
Weather by City in August
CityLow / highRain
Busan
Warm
23°29° 239 mm
Incheon
Warm
22°29° 262 mm
Daegu
Warm
22°31° 213 mm
Daejeon
Warm
21°30° 283 mm
Gwangju
Warm
22°31° 266 mm
Suwon
Warm
21°29° 293 mm
Ulsan
Warm
22°30° 209 mm
Average daily low and high (°C) and monthly rainfall. The badge shows how it feels, allowing for humidity.
Temperature map
-30°-20°-10°0°10°20°30°40°
Average temperature across South Korea in August.
Where to Go in South Korea in August
Seoul & Northwest
Gyeonggi, Incheon, Yellow Sea coast
August often remains hot and humid, though the monsoon eases and typhoon influences can bring episodic heavy rain and gusty winds, especially later in the month. Urban heat islands make Seoul evenings muggy; rooftop bars fill after sunset, but daytime walking can be tiring. If you plan river cruises on the Han or day trips to the Yellow Sea islands, keep an eye on weather advisories - ferry service may be canceled on rough days.
Gangwon Province & the Taebaek Mountains
Sokcho, Pyeongchang, Seoraksan
August tends to be muggy and warm at sea level but remains noticeably cooler than the southern mainland, especially overnight in alpine valleys. Typhoon presence is possible and can drive strong winds and torrential rain that affect ferry schedules and mountain access. If your priority is hiking, aim for early mornings and mid-September as a backup in case storms disrupt plans.
Central Korea
Chungcheong, Daejeon, Cheongju, Boryeong
August continues humid and hot, though intense storms and occasional typhoon remnants can produce abrupt flooding and strong winds, affecting ferry schedules and coastal plans. Central cities can feel stifling in the afternoons but often cool at night with air conditioning common in public spaces. Plan indoor alternatives during heat spikes and consult local weather bulletins before traveling to low-lying rural areas.
Yeongnam / Southeast
Busan, Daegu, Ulsan, Gyeongsang
August remains hot and humid; however, Busan’s sea breezes can make the heat more tolerable than in inland Daegu, where temperatures frequently peak highest on the peninsula. Haeundae and Gwangalli beaches are crowded, and evening promenades are lively. If you plan coastal or island visits, check ferry timetables and pack lightweight, breathable clothing and sunscreen for daytime activity.
Jeolla & Southwest
Gwangju, Mokpo, Suncheon, Boseong
August is hot, humid and still susceptible to typhoon impacts; strong winds and heavy rain can suddenly close coastal roads and interrupt ferry services. Many Koreans travel to coastal resorts in August, so where beaches are accessible they are busy on clearer days. Travelers should monitor forecasts closely, avoid exposed coastal drives during storms and pack a lightweight, waterproof jacket.
Jeju Island
Hallasan, Seogwipo, Jeju City, Udo
August remains warm and is the busiest month for domestic tourists, with beaches and coastal attractions crowded when the weather permits. Typhoon season is a real possibility and can bring abrupt travel disruption, so maintain flexibility and consider travel insurance. Lightweight, breathable clothing and a rain jacket are essential; reserve ferry or tour slots well in advance for weekend travel.
Events & Festivals in August
There are no major festivals or events in South Korea during August to be aware of.
Planning a trip to South Korea?
See how August compares with the rest of the year, then read the full guide.