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Weather and Temperature in South Korea during Summer

Aerial view of Busan city during summer in South Korea.
During the summer in South Korea, Busan has somewhat higher temperatures than Seoul.

Although the summer temperatures in South Korea rarely exceed 30°C, high humidity levels can make conditions a bit muggy. Along with the heat, the country also experiences significant rainfall during the summer, with the monsoon season often lasting from June to July. During this time, it's best to be prepared for severe rains and thunderstorms. But despite the heat and rain, summer in South Korea provides plenty of opportunities to engage in outdoor sports, city tours, and beach holidays.

The coastal city of Busan experiences slightly higher temperatures than Seoul, averaging between 26°C and 36°C. But if you are planning to travel to Jeju Island, you will experience milder temperatures, between 24°C and 30°C, making it a popular destination to explore.

  June July August
Avg high 26°C (79°F) 27°C (81°F) 28°C (83°F)
Avg low 16°C (61°F) 20°C (68°F) 20°C (68°F)
Rainfall (mm) 134 370 294

For a more seasonal overview, check out our guide on the best time to visit South Korea.

Why visit South Korea in Summer

Traditional South Korean food in night market during summer.
Dive into the richness of traditional South Korean cuisine at the night market.

From lively festivals and outdoor activities to delicious cuisine and stunning natural beauty, here are some compelling reasons why a trip to South Korea during summer is a good idea:

  • Night markets: Summer nights in South Korea come alive with lively night markets. These lively open-air markets sell a diverse range of street food, apparel, accessories, and handmade items. Explore Seoul's famous Dongdaemun Night Market or Gwangjang Market, where you can try local specialties like bindaetteok (mung bean pancakes) and pajeon (Korean savory pancakes) while wandering through endless rows of shops.
  • Festivals and events: There is no shortage of events and festivals in South Korea during the summer months, ranging from the Boryeong Mud Festival, where you can participate in mud wrestling and mudslides, to the Busan International Film Festival, which showcases the finest of Asian cinema.
  • Ideal beach temperatures: South Korea has a coastline that runs for thousands of kilometers and is home to several lovely beaches where you can relax and soak up the sun. Beach locations such as Busan, Jeju Island, and Sokcho are popular among both locals and visitors during the summer months. Whether you want a lively beach party scene or a peaceful place to unwind, you'll find a variety of options to suit your needs.

Top 3 Destinations in South Korea during Summer

Some of the best places to visit in South Korea in summer are its vibrant and beautiful cities. They offer plentiful accommodations and tons of indoor attractions where you can escape in the weather outside is too hot or rainy:

1. Seoul

Gyeongbokbung palace in seoul
Known as the Northern Palace, the palace once contained 7,000 rooms and today you can walk through the grounds viewing more than forty other exquisitely designed buildings.

The South Korean capital city shines as one of the top summer getaways. During the summer months, the temperature hovers around the 28°C mark, ideal for exploring the city’s many attractions and taking in its vibrant atmosphere, and bustling night markets. Enjoy the water sports in the Han River, discover the city's modern and historic charms, and savor delectable street food during a trip to Seoul.

Major attractions: Gyeongbokgung Palace, N Seoul Tower, and Bukchon Hanok Village.

Pros:

  • The city hosts plenty of amazing events during the summer including the fabulous Waterbomb Festival.
  • The beautiful weather in Seoul allows for a wide range of outdoor activities.

Cons:

  • The city’s attractions could be crowded around the summer holiday period.

2. Busan

Aerial view of Gwangalli beach in Busan, South Korea.
Experience the breathtaking beauty of Busan's beaches during summer.

The coastal city of Busan is a super popular place to visit in summer, thanks to its stunning beaches. A trip to Busan is an excellent idea if you’re looking for fun by the seaside. Cool down in the crystal-clear waters, try some water sports, or head into the nearby mountains for hiking and camping adventures.

Major attractions: Haedong Yonggungsa Temple, Haeundae Beach, and Jagalchi Market.

Pros:

  • Summer is the best time to kick back on stunning beaches and soak up the coastal vibes.
  • Summer is the best time to kick back on stunning beaches and soak up the coastal vibes.
  • Summer offers some of the best fresh produce that master chefs transform into delicious meals. This is your chance to make the most of Busan’s amazing food scene.

Cons:

  • Busan is one of the hottest and most humid places in South Korea, which some travelers may find uncomfortable.
  • Beaches are generally crowded during the summer months.

3. Boryeong

Aerial view of Boryeong city Daecheon beach, South Korea
Embrace the summer splendor of Boryeong in South Korea, where, beauty, adventure and unforgettable memory awaits.

Summer is an excellent time to take a trip to Boryeong. During summer, the city hosts the thrilling Mud Festival, a one-of-a-kind event that includes mud wrestling, mudslides, and mud baths. The festival's vibrant atmosphere, beachfront location, and fun activities make it a must-visit destination. Boryeong also has some of the most gorgeous beaches in South Korea.

Major attractions: Gaehwa Art Park, Muchangpo Beach, Daecheon Beach, and Boryeong Mugunghwa Arboretum.

Pros:

  • Boryeong tends to be a lot less crowded than Busan or Seoul.
  • Summer is an excellent time to take advantage of the city’s stunning beaches and crystal-clear waters.
  • The city hosts an amazing mud festival in summer.

Cons: 

  • Prices and crowd levels tend to rise around the mud festival.

Top Activities During Summer in South Korea

Hiker on Seoraksan National Park during a bright day.
Experience the beauty of Seoraksan National Park as you hike through its trail.
Couple snorkeling in South Korea.
Immerse yourself in the mesmerizing underwater world of snorkeling in South Korea during summer.
  • Go snorkeling: Given how warm and muggy summer in South Korea can feel, spending time in the water can be soothing. One of the most popular summer activities in South Korea is going snorkeling. The best place to experience this amazing activity is Jeju Island. Filled with the most transparent waters, gorgeous beaches, and fantastic wildlife, it’s a must-visit place in South Korea during summer.
  • Cool off in mountain streams: If you’re looking for an activity that is near Seoul while avoiding the city crowds, join the locals in a popular summer pastime: swimming in the streams of Gwanaksan Mountain. Taking a dip in mountain streams, surrounded by stunning nature, is an experience like no other.
  • Dive into Han River fun: Take advantage of the lovely weather by participating in a variety of activities near Seoul's Han River. Rent a bike and pedal along the riverbank walks, go stand-up paddleboarding or kayaking for an adventurous experience on the water, or take a romantic sunset cruise with breathtaking views of the town.
  • Hike in Seoraksan National Park: In Seoraksan National Park, near Sokcho, embark on an exciting hiking adventure. The park's natural splendor is spectacular, with lush woods, towering peaks, and gushing waterfalls. Trails such as Ulsanbawi Rock can be challenging, or you can take a leisurely stroll through nature, enjoying the magnificent views and tranquillity of the surroundings.

Travel Tips to Visit South Korea in Summer

  • With monsoon rains descending pretty much every day and around the same time, try and organize your day’s activities around the downpours.
  • Make sure that you bring a small and secure bag for your outing. Crowded spaces often welcome pickpockets, so it’s best to come prepared.
  • It’s best to plan your activities in the evening, especially if you’re doing a lot of walking. This way you can avoid the hottest and most humid parts of the day.
  • For cooler temperatures, scenic hiking paths, and spectacular natural beauty, head to places such as Seoraksan National Park and Jirisan.

Despite the hot, humid weather conditions, summer in South Korea offers a wealth of fascinating experiences and cultural delights. From the exciting Boryeong Mud Festival to the stunning beaches of Busan to the bustling night markets of Seoul, South Korean summer offers a unique blend of fun and adventure.

Planning a trip during the busiest travel season can be challenging, that’s why we have our amazing customized trip to South Korea. Reach out to our local travel experts who will help you put together your dream South Korean itinerary.

South Korea tours in Summer
Published by Astha Joshi, updated on December 21, 2023

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