When people think of Japan, they often imagine cherry blossoms in spring or colorful maple leaves in autumn. But if you’re planning to visit in July or August, be warned: Japanese summer is not just hot — it’s steamy, sweaty, and exhausting.
Here’s everything you need to know about Japan’s humid summer and how to survive it like a local.
🌡️ How Hot Is It Really?
In major cities like Tokyo, Osaka, and Kyoto, daytime temperatures can soar above 35°C (95°F). But it’s not just the heat — it’s the humidity, often over 80%, that makes it feel much worse.
🔥 Real Feel: Even when it’s “only” 32°C, the humidity can make it feel like 42°C (107°F). Imagine walking into a sauna that never ends — that’s Japan in August.
🥵 Real-Life Example: The “Muggy Blanket” Effect
Foreign tourists often describe the experience as being “wrapped in a wet blanket.” Here’s what one visitor from Germany had to say:
“It felt like the air had weight. I was drenched in sweat within 10 minutes of stepping outside. Even the shade felt hot.”
Cities like Kyoto, surrounded by mountains, are known for being particularly oppressive because the heat gets trapped in the basin.
🚨 Heatstroke Is a Serious Risk
Every summer, over 50,000 people are hospitalized in Japan due to heatstroke. The elderly and children are especially vulnerable, but tourists are also at risk because they often walk long distances outdoors.
🧊 Tip: Free cold water is available at many convenience stores, public buildings, and even temples during summer. Always carry a bottle and refill when you can.
💦 The Sweat Factor: Be Prepared to Be Soaked
In Japan, you will sweat a lot — even if you’re just standing. Locals carry towels (called “tenugui”) and folding fans in their bags. You should, too.
🧻 Tip: Buy a cooling wipe or body sheet at any 7-Eleven or Lawson. These help you feel refreshed and remove stickiness.
☀️ Best Times to Go Outside
To avoid the worst of the heat:
- Go out early morning (before 10 a.m.) or late evening (after 5 p.m.)
- Take breaks in air-conditioned cafes, museums, or department stores
- Avoid walking long distances between noon and 3 p.m.
🏞️ Where to Escape the Heat
Japan has cooler places even in summer:
- Karuizawa (Nagano): A favorite mountain retreat for Tokyoites
- Hokkaido: The northern island offers mild temperatures and fresh air
- Kamikochi: A beautiful highland valley in the Japanese Alps
🌲 Bonus Tip: Avoid Kyoto and Nara in the afternoon unless you like feeling like steamed dumplings.
👘 How Locals Dress for the Heat
Japanese summer fashion is all about staying cool:
- Lightweight, breathable clothes (linen, cotton)
- Sun umbrellas (yes, even for men!)
- UV-blocking arm covers
- Hats and sunglasses
You’ll see locals using portable fans, many of which are rechargeable and worn around the neck — feel free to grab one at Don Quijote!
🍧 Cool Foods & Drinks to Try
- Kakigori (shaved ice with syrup)
- Hiyashi Chuka (cold ramen)
- Mizu-yokan (chilled red bean jelly)
- Pocari Sweat / Aquarius (electrolyte drinks to fight dehydration)
Convenience stores also sell ice packs, cold towels, and mint body spray to help you stay fresh.
🚇 Transportation Is a Lifesaver
Most Japanese trains and buses are air-conditioned. When planning your day, use public transport to minimize time outside. Even 15 minutes of walking under the sun can drain your energy.
🎐 Final Advice: Enjoy, but Respect the Heat
Japanese summers can be brutal, but with a little planning, you can still enjoy your trip. Stay hydrated, avoid the midday sun, and listen to your body. Don’t hesitate to take a break in a convenience store or spend a few hours indoors if you feel tired.