If you are planning to visit South Korea between late June and August, or if you’ve recently unpacked your bags to start a new life in Seoul, you are probably bracing yourself for the weather. You might have checked the temperature forecast and thought, “Oh, 32°C (90°F)? That’s not too bad. I can handle that!”

But here is the catch: Seoul’s summer isn’t just hot. It is aggressively humid.

Thanks to the East Asian monsoon season, known locally as 장마 (Jangma), the humidity levels in Seoul frequently soar above 80%. Stepping outside during July and August doesn’t just feel like walking into a warm sunny day; it feels like walking straight into a thick, steaming sauna.

Don’t worry, though! Millions of Seoulites navigate this intense climate every single year while remaining flawlessly stylish and energetic. As your trusted local guide, I’ve put together the ultimate Seoul Summer Survival Guide to help you beat the humidity, stay fresh, and vibe with the city like a true local.

1. Surviving ‘Jangma’ (장마): The Art of the Korean Monsoon

Before the peak mid-summer heat hits, Seoul undergoes 장마 (Jangma), which typically spans from late June to mid-July. This isn’t just a light summer shower; it involves torrential, unpredictable downpours that can last for weeks.

To survive Jangma, you need to change your mindset about daily prep:

• Ditch the Cheap Convenience Store Umbrellas: A sudden gust of wind down a Gangnam skyscraper alley will instantly snap a 5,000 KRW plastic umbrella. Invest in a sturdy, wind-resistant compact umbrella that fits neatly into your daily bag.
• Embrace the Rain Shoes Trend: You will notice that many fashion-forward young Koreans swap their canvas sneakers for stylish rubber rain boots (like Hunter or local minimalist brands) or premium hiking sandals during this month. Walking around Seoul with soggy, wet socks is a quick way to ruin your day.
• The Dehumidifier Secret: If you are renting a studio apartment (Officetel) or staying in an Airbnb, look for a button on your air conditioner remote labeled 제습 (Jeeseup). This turns on the dehumidifier mode. Running this for just 30 minutes will instantly make your room feel crisp and comfortable without freezing you out.

2. Public Transportation Etiquette: The Aircon Tug-of-War

Seoul has one of the best public transit systems in the world, and during the summer, the subways and buses are blasting crisp, freezing air-conditioning. However, because everyone experiences temperature differently, there is a unique social etiquette you should know.

On the Seoul subway lines (especially Lines 1, 3, 4, and the Gyeongui-Jungang Line), the middle cars can get intensely cold. If you are someone who gets chilled easily, or if you are dripping in sweat and worried about catching a sudden cold from the temperature shock, look out for this specific Korean term:

약냉방칸 (Yang-naeng-bang-kan) — Mildly Air-Conditioned Car

These are specially designated subway cars where the temperature is kept slightly higher (1∼2∘C warmer) than the standard cars to accommodate elderly passengers, pregnant women, or anyone sensitive to extreme cold. Usually, these are located in the middle of the train (typically cars 4 and 7 on 10-car trains).

Conversely, if you are melting and need maximum cooling, avoid the Yang-naeng-bang-kan and head to the standard cars!

3. Your Summer Holy Grail: The Olive Young Shopping List

When the humidity levels make you feel like your makeup is melting off and your clothes are sticking to your skin, it’s time to head to the nearest Olive Young (올리브영)—Korea’s premier health and beauty store. You can find one on almost every major street corner in Seoul.

Pop inside and look for these three life-saving summer essentials that locals swear by:

Essential Item (English)	Korean Name on the Label	Why You Need It
Cooling Body Sheets	쿨링 바디 물티슈 (Cooling Body Wipes)	These are oversized, wet wipes infused with menthol or silica powder. Wipe your neck and arms after stepping out of the subway, and it instantly lowers your skin temperature and removes the sticky feeling, leaving a powdery finish.
Hair No-Sebum Powder	노세범 파도 (No-Sebum Powder)	The extreme humidity can turn fresh bangs or smooth hair greasy within minutes. Tapping a little bit of this translucent mineral powder onto your roots absorbs excess oil instantly and restores your volume.
Soothing Aloe Vera Gel	알로에 수딩젤 (Aloe Soothing Gel)	Perfect for the end of the day. If you spent hours walking around Gyeongbokgung Palace under the blazing sun, applying chilled aloe gel will instantly calm sunburns and skin irritation.

4. The Unofficial Uniform of Seoul: Portable Hand Fans

If you look around a crowded Seoul street in July, you will notice an unspoken cultural uniform. Almost every person will have one hand occupied by a small gadget held up to their face.

This is the legendary 휴대용 선풍기 (Hyudaeyong Seonpunggi), commonly referred to as a 손풍기 (Son-punggi) or portable hand fan.

The Mid-Summer Seoul Commute:
[Step out of subway] ➔ [Click 'Son-punggi' to Level 3] ➔ [Survive the 10-minute walk to the office]

While carrying a battery-operated fan might look a bit unusual at first if you come from a Western country, it is an absolute necessity here. Young professionals, students, and elders alike use them constantly while waiting for traffic lights, walking through crowded markets, or standing on outdoor bus platforms.

You can buy highly aesthetic, sleek, minimalist versions at stores like Kakao Friends, Line Friends, Daiso, or any local lifestyle shop for around 10,000 to 20,000 KRW. Trust me—buy one on your first week here. It will become your absolute best friend.

Summary: Embrace the Heat Like a Seoulite

Seoul’s summer is intense, fast, and incredibly sweaty, but it is also one of the most vibrant seasons in the city. The night markets come alive along the Han River, the cafes serve the most spectacular iced treats, and the energy of the city never slows down. By packing a solid umbrella, knowing your subway cars, carrying your Son-punggi, and making a quick run to Olive Young, you will easily conquer the humidity and enjoy every single moment of your summer adventure.

🍗 What’s Next? The Ultimate Local Secret to Beating the Heat!

Did you know that when the weather gets impossibly hot, Koreans don’t just hide indoors eating ice cream? Instead, they gather together to practice a unique cultural philosophy called 이열치열 (Iyeol-chi-yeol)—fighting fire with fire!

To discover the incredibly unique traditional days dedicated entirely to eating steaming hot, nutrient-packed foods to supercharge your summer stamina, click over to our next post: [Understanding ‘Boknal’: Why Koreans Eat Hot Soup on the Hottest Days of Summer]. (Note: Internal link will be activated soon!)

Share Your Thoughts!

How do you cope with intense humidity in your home country? If you are currently in Seoul, what is your number one survival tip? Let me know in the comments below!

다음에 봐요! (See you next time!)