Weather in Japan in August

August in Japan is the epitome of summertime, and the reasons to visit are pretty much the same as in July. Many people hit the beach, participate in water sports, or go on mountain excursions. The main difference is the intense heat and humidity that the weather in Japan in August delivers. Fireworks and festivals are still a big deal, but in August they really excel. Traveling to Japan around the Bon vacation can be one of the busiest and most expensive times. Whether you want to immerse yourself in nature or attend cultural events, August offers a blend of tradition, relaxation, and stimulating activities.

Japan in August at a glance

While the August days are long and filled with sunshine, be prepared for hot and sticky weather, especially in major cities. Vibrant Obon celebrations and breathtaking fireworks displays across the country are all hallmarks of Japan’s peak summer.

• August highs in central Japan can reach 79°F to 95°F (26°C to 35°C), although Hokkaido offers a slight respite with cooler averages of 70°F to 86°F (21°C to 30°C). Okinawa’s tropical climate sees temperatures between 82°F and 91°F (28°C and 33°C).
• Japan in August can be unbearably hot, so it's a good idea to include some things to do that will keep you cool, like visiting the beach and exploring the cooler mountain regions.
• August is one of Japan’s busiest months, driven by Obon vacations and the peak travel season. With high demand, flights and accommodations are at their most expensive, and should be booked well in advance.

Is August a good time to visit Japan?

With the Obon celebrations in full swing in early to mid-August, Japan boasts a vibrant energy that will contribute to making your summer vacation unforgettable. Obon, a traditional event honoring deceased family members, fills towns and cities with lanterns and traditional Bon Odori dances. Summer treats like watermelon and grilled corn are highlights of the summer food scene.

The hot weather in Japan in August means sunseekers are drawn to the beaches and islands, especially along the Seto Inland Sea, while the tropical climate of Okinawa is perfect for exploring beaches and coral reefs. Many people head to the higher altitudes to enjoy the cooler mountain air. The national parks of Hokkaido and the Japan Alps provide excellent hiking opportunities. Big cities like Osaka and Tokyo are less crowded during the peak August vacation season and offer respite in air-conditioned attractions.

Even though it's hot and humid, traveling to Japan in August will always be full of exhilarating energy, colorful culture, city attractions, beach getaways, and diverse activities.

Average daily temperatures in August

Japan in August is peak summer so it comes as no surprise that you should expect hot and sticky conditions dominating most regions. That said, there are cooler parts where you can escape the scorching temperatures. For example, Hokkaido remains a cooler refuge, with daytime highs between 75°F and 84°F (24°C and 29°C) and lows of about 61°F to 68°F (16°C to 20°C).

Central Japan, which takes in Tokyo and Osaka, experiences highs ranging from 86°F to 95°F (30°C to 35°C) and warm nights averaging 75°F to 82°F (24°C to 28°C). Tropical temperatures are experienced on Kyushu and Shikoku, with highs ranging from 89°F to 96°F (32°C to 36°C) and lows of about 77°F to 84°F (25°C to 29°C). On Okinawa, you can expect it to be consistently very hot, with highs of 90°F (32°C) and lows around 82°F (28°C).

What about the crowds and cost in August?

Japan experiences a surge in activity throughout August due to summer festivals, the Obon vacations, and the peak travel season. Coastal regions and mountain trails are crowded with summer vacationers. However, cities like Tokyo and Kyoto see fewer tourists than usual due to the heat and humidity.

August is the most expensive month for airfares and accommodations due to high demand. Seats on aircraft and trains sell out quickly, so plan and book well in advance to secure reasonable costs, or consider staying in one of the major cities. Despite the costs and congestion in some areas, August is still an exciting time to experience Japan at its most dynamic.

Things to do in Japan in August

There’s no doubt that the weather in Japan in August can be insanely hot, but the miles of picturesque coastline and cooler mountain air make this time perfect for relaxing on the beach or taking a mountain retreat; both provide a refreshing contrast to the heat of the cities. Here are some of the best things to do in Japan in August to get the most out of your trip.

Snorkel and dive in Okinawa

Okinawa’s tropical islands are a paradise for water sports, and August is one of the best months to explore their coral reefs. Ishigaki, Miyako, and Kerama Islands offer exceptional snorkeling and diving opportunities, with vibrant marine life, clear turquoise waters, and stunning underwater landscapes. White-sand beaches like Furuzamami Beach on Zamami Island provide the perfect spot to relax after a day in the water.

Hike in Daisetsuzan National Park

Hokkaido offers a cool retreat from the summer heat, and Daisetsuzan National Park is a haven for hikers. Trails like Asahidake, Hokkaido’s tallest mountain, lead through alpine meadows, volcanic landscapes, and natural hot springs. August’s clear skies and blooming wildflowers make it a stunning time to explore the park’s rugged beauty. Wildlife enthusiasts might spot deer, foxes, and even brown bears in their natural habitat.

Explore Tottori’s sand dunes

The Tottori Sand Dunes, Japan’s largest dune system, is an exciting destination for adventure seekers. Visitors can enjoy sandboarding, camel rides, or a guided tour of the unique desert-like environment. The nearby Sand Museum showcases intricate sand sculptures created by international artists, providing a fascinating indoor experience.

Discover the rural charm of Iya Valley

Nestled in Shikoku, the Iya Valley is a remote region of deep gorges, vine bridges, and traditional thatched-roof houses. In August, the lush greenery and mild mountain air offer a peaceful escape from the summer heat. Visitors can hike, raft down the Yoshino River, or relax in a secluded onsen overlooking the valley. 

Festivals and events in Japan in August

The month of August is considered to be the peak month for festivals in Japan. During this time, celebrations of tradition, fire, and community spirit can be enjoyed all around the country.

• Nebuta Matsuri: Aomori hosts this famous festival, featuring enormous illuminated floats depicting warriors and mythical figures, accompanied by taiko drumming and energetic dancing.
• Awa Odori: Tokushima Prefecture comes alive with this traditional dance festival, where performers in colorful costumes chant and move to lively music.
• Daimonji Gozan Okuribi: In Kyoto, massive bonfires are lit on mountain slopes to guide ancestral spirits back to the afterlife, marking the conclusion of the Obon season.