Summer in Japan: Easy Ways to Beat the Heat!

As spring turns into summer in Japan, residents and tourists scramble to beat the heat. The hot temperatures and humidity are no joke and becoming even more extreme due to climate change.

Elderly people and folks unused to this kind of weather are especially at risk of heatstroke or heat exhaustion. How can you protect yourself and your loved ones while still having fun? Read along for our tips on beating the summer heat in Japan. 

What does a typical summer in Japan look like?

A typical summer in Japan starts with rain. Late May and June are wet and stormy, with an average of 49 mm (1.93 in) of precipitation in Tokyo alone. July and August switch out the rainfall for hot, muggy weather. Tokyo averages 25-30 degrees Celsius (77-86 degrees Fahrenheit), though temperatures have risen to 40 ℃ (104 ℉). The average humidity in Tokyo is between 71% and 78%, continuing even into September.

Despite all that, people still brave the weather to visit Japan. Seaside destinations like Okinawa, Fukuoka, and Osaka, where temperatures are more tolerable, see a lot of tourist activity. There are also many natsu matsuri (summer festivals), from the Tanabata (Star Festival) in Sendai to the Fuji Rock Festival at the Naeba Ski Resort in Yuzawa. Finally, we can’t forget Obon Matsuri, which sees a lot of traffic throughout Japan in mid-August.

How dangerous is the heat in Japan?

As hot as Japan can get, climate change is making things worse. According to Earth Simulator, summer temperatures are expected to increase by almost 5 ℃ (41 ℉) in 2100 compared to those in 1900. More rain falls earlier in the year, causing immature plant growth, ecosystem disruption, and extreme weather events like flooding and landslides. These storms are more frequent and intense than the country’s weather response system can handle. 

2024 was Japan’s hottest summer for the second year in a row. Sano City, Tochigi recorded the country’s highest temperature on July 29th (41 ℃/105.8 ℉). Plus, there was a significant increase in heat-related illnesses. That same month, Tokyo Metropolis alone reported over 3700 hospitalizations and over 120 deaths from heatstroke.

It also had the highest number of heatstroke-related deaths by prefecture (907). The Japanese Association for Acute Medicine were forced to add “most severe” to the heatstroke index categories. 

Are you looking for great snacks to beat the heat? Check out TokyoTreat! TokyoTreat delivers limited-edition Japanese noodles, snacks, drinks, and sweets right to your door so you can enjoy the latest spring goodies directly from Japan!

How can I beat the heat?

Don’t let these facts scare you. Here are some easy ways to stay cool – and safe – during summer in Japan.

Hydrate frequently

Your body loses lots of water through sweat, especially when it’s hot and humid. Avoid drinks that contain caffeine and sugar. Instead, drink lots of water and electrolyte-rich fluids like Pocari Sweat and Aquarius. Carry a bottle with you if you plan to go outside or do physical activity, and continue topping it up throughout the day. Eat juicy fruits and vegetables like watermelons and cucumbers for extra nourishment.

Protect your skin 

Light-colored and loose clothing are a must if you survive summer in Japan. Pale color palettes and breathable fabrics will help you move more easily and stay cooler longer. Wear a hat (the floppier, the better) and sunglasses whenever you go outside for UV protection. Finally, apply and keep applying sunscreen. Try some Japanese products like the Bioré UV Aqua Rich.

Stay in the shade

Many fun outdoor summer activities exist, but you must be smart about planning. Leave earlier in the morning or later in the evening when temperatures are cooler. Stay close to trees and covered shelters. Consider buying a handheld battery-powered fan or an umbrella to carry the shade. Finally, stay in air-conditioned places during heat waves. Remember that indoor attractions will be crowded since many people will have the same idea.

Learn the signs of heat-related illnesses

This tip is especially important if you or someone you know is vulnerable to heatstroke. Signs include flushed and clammy skin, a high body temperature, agitation or confusion, and rapid breathing. If you see someone exhibiting these signs, call medical services and move the person to a shaded spot. Keep them cool by removing extra layers of clothing and giving them water or ice packs. Knowing what to do and acting quickly might save somebody’s life.

Why should I make sure to beat the heat this summer?

It is important to know the risks of warmer weather and how to protect yourself from the summer heat and humidity. Between June and August, Japan has many beautiful natural landmarks and cultural events, and we want our readers to enjoy them while staying safe and cool.

Use common sense to get the most out of your visit. We hope our tips were helpful, from hydrating often to staying in shaded and air-conditioned areas. We encourage you to share them with friends and loved ones planning to travel to Japan later this year. How do you beat the heat in the summertime? Drop your suggestions in the comments.

Sources

• Japan International Research Center for Agricultural Sciences. “1072. Definition, Impacts, and Causes of Heat Waves“.
• The Asahi Shimbun. “Report: ‘Once-in-a-century’ heat wave could be annual event“.
• The Mainichi. “Editorial: Japan’s new ‘heatstroke special alert’ a reminder to prepare, prevent“.
• Go Tokyo. “Beat the Heat: How to Stay Cool During Summer in Tokyo“.