Miyagi Prefecture lies in Japan’s Tohoku region, and its capital, Sendai, is the largest city in the area. Located on a coastal plain along the Pacific Ocean, the city benefits from sea breezes that keep summer surprisingly comfortable. Rainfall does increase during the rainy season, but overall precipitation remains moderate, making it suitable for outdoor activities.

In Sendai, June marks the start of the rainy season (tsuyu). Rain becomes more frequent, but temperatures stay cool and pleasant. By July, as the rainy season ends, humidity rises and occasional highs above 30°C (86°F) are possible, though conditions generally remain comfortable. Even in August, Japan’s hottest month, Sendai’s average temperature stays below 30°C (86°F), making it a refreshing summer getaway compared with the intense heat of Taiwan.

Here, LIVE JAPAN's Taiwanese editor Nemi, who has lived in Japan for seven years, shares real-life summer outfit ideas. Complete with demonstration photos and actual outfits worn by kids, these examples can help you plan what to wear during a summer visit to Sendai.

June in Miyagi Prefecture marks the start of early summer. With average temperatures around 20°C (68°F), the weather feels pleasantly fresh. However, June is also the height of the rainy season in Sendai, and conditions can change quickly, so it’s wise to carry an umbrella or rain gear.

June is also when hydrangeas come into full bloom. One highlight is Shifukuji Temple in Sendai’s Aoba Ward, often called the “Hydrangea Temple.” Each year, about 1,000 hydrangea plants blanket the grounds.

The most striking sight is the staircase leading from the main path to the temple gate. Lined with blooming ajisai on both sides, it creates the feeling of walking through a river of flowers. After rainfall, the blossoms appear even more vivid, giving the historic temple a dreamy, romantic atmosphere.

June in Miyagi Prefecture is a great time to enjoy the fresh, cool feel of early summer. One highlight is Shifukuji Temple in Sendai, known as “Ajisai-dera” (Hydrangea Temple). In mid to late June, the grounds are filled with thousands of deep blue and soft purple hydrangeas, creating a romantic and highly photogenic scene.

At Matsushima, one of Japan’s Three Views and a UNESCO World Heritage candidate, a leisurely cruise in the early summer breeze is especially pleasant. The area is also a great place to enjoy seasonal anago (saltwater eel), freshly caught and full of flavor.

If you enjoy the outdoors, June is also one of the best times to visit Zao Okama after the mountain roads open for the season. Without the harsh cold of winter, the emerald-green crater lake appears especially vivid against the surrounding volcanic landscape.

Since Miyagi’s attractions range from city sights to remote mountain areas, larger groups may want to consider a chartered car tour. It makes it easier to travel during rainy-season showers and allows you to move smoothly between places like the Matsushima coast and the mountains of Zao.

As July arrives in Miyagi Prefecture, the rainy season comes to an end and rainfall drops noticeably. Average temperatures stay below 30°C (86°F), which feels very comfortable compared with many other parts of Asia, making it an excellent time to get out and explore Sendai.

Summer in Japan is also festival season, and Sendai is no exception. At the end of July, the city hosts the two-day Natsu Matsuri Sendai Suzume Odori, a lively street dance festival inspired by the quick, playful movements of sparrows.

Alongside the energetic performances, the streets fill with food stalls and a festive atmosphere. If you want to experience the excitement of a classic Japanese summer festival, this is one you won’t want to miss.

July in Miyagi brings bright sunshine and some of the region’s most exciting summer festivals. One highlight is the Shiogama Port Festival, held on Marine Day. Known as one of Japan’s three great ship processions, the event features large portable shrines (mikoshi) carried aboard the Hōōmaru and Ryūōmaru as they sail across Matsushima Bay, creating a striking spectacle on the water.

Later in July, Sendai-jo (Sendai Castle) often hosts evening illumination events. From the hilltop grounds, you can enjoy views of the Sendai skyline at dusk and take photos with the famous equestrian statue of Date Masamune.

If you’d like to escape the midday heat, Umi no Mori Aquarium Sendai, the largest aquarium in the Tohoku region, is a great choice. In July, the impressive “Sea of Life” tank becomes a highlight as tens of thousands of sardines move together like a shimmering galaxy.

For food lovers, July is also peak season for Sanriku uni (sea urchin). Visit a local market to taste it freshly prepared, known for its delicate sweetness. Since temperatures can climb during the day, traveling between attractions by chartered car can make the trip more comfortable, with air conditioning and easy access between places like Shiogama Port and the aquarium.

August is Miyagi’s liveliest summer month. Although average temperatures exceed 25°C (77°F), the heat feels far more comfortable than the intense summer temperatures in Taiwan. During this time, the zelkova-lined Jozenji-dori avenue, famous for its golden ginkgo leaves in autumn, is covered in a lush green canopy, offering a refreshing place to enjoy the leafy charm that gives Sendai its nickname, the “City of Trees.”

August is also Sendai’s most iconic festival season. The world-famous Sendai Tanabata Matsuri takes place each year from August 6 to 8, when shopping arcades across the city are decorated with hundreds of colorful handcrafted Tanabata streamers, creating a vibrant festival atmosphere.

The celebrations begin with the Sendai Tanabata Hanabi Festival, a spectacular fireworks display that lights up the sky over the City of Trees. It’s one of the most memorable summer experiences in Sendai.

August in Miyagi is all about the magnificent Sendai Tanabata Matsuri (Aug 6–8). The shopping arcades in central Sendai are draped with thousands of enormous, handcrafted Tanabata streamers, some reaching around 5 meters (16 feet) in length. Walking beneath the swaying decorations, alongside paper cranes and spinning kazaguruma (pinwheels), feels almost magical.

The celebrations begin on the evening of August 5 with the Sendai Tanabata Hanabi Festival. Tens of thousands of fireworks light up the night sky, creating a spectacular opening to the festivities and a memorable moment for visitors and photographers alike.

Beyond the main festival, August is also a wonderful time to visit Matsushima, one of Japan’s Three Views. The Matsushima Toro Nagashi to Hanabi Taikai combines a lantern-floating ceremony with fireworks, as glowing lanterns drift across the water while bursts of light illuminate the bay, capturing the serene beauty of a Japanese summer night.

Sendai's summer weather is generally stable. While June brings the rainy season and August can see typhoons, overall temperatures are comfortable and rainfall is relatively low — conditions that make it a pleasant destination for summer travel.

The rainy season (tsuyu) in Sendai typically falls in June. While the exact dates can vary slightly from year to year depending on weather patterns, it almost always occurs during June.

Yes! Sendai can be affected by typhoons from August onward. If you're planning a trip to Sendai in August, be sure to keep an eye on weather forecasts and have a backup plan ready in case of rain or a typhoon.

Sendai’s summer is full of energy and seasonal highlights. July brings the lively Natsu Matsuri Sendai Suzume Odori, while August features the famous Sendai Tanabata Matsuri. If you want to experience the atmosphere of a Japanese summer festival, Sendai is a wonderful place to visit during this season.

Planning a trip? Be sure to check the weather tips and outfit suggestions in this guide so you can pack comfortably and enjoy your time exploring the city.

One reminder for travelers: August 13–16 is the Obon holiday period in Japan. During this time, some shops and restaurants may close or operate on reduced hours, and popular attractions may require reservations due to increased crowds. Planning ahead can help you avoid any inconvenience during your visit.