Shizuoka Weather in August

Season: Summer

Augusts is the hottest month throughout the year in Shizuoka, with lots of rainfall. As the temperature rises to a relatively high level, Mt. Fuji summit has been open for hiking. When here, also do not miss experiencing water sports and admiring fireworks shows.

Hottest Time over the Year

Average Temperature: 24-31℃ (75-88℉)
August is the hottest time in a year in Shizuoka: day temperatures mostly range from 30-34℃ (86-93℉). The first half of the month is more likely to experience severely hot weather with the high sometimes exceeding 36 degrees Celsius (97 degrees Fahrenheit). Whatever, heatstroke prevention measures are essential in this month, such as drinking plenty of water and bringing a compact, portable fan or cooling wet wipes. The summer heat eases somewhat in the evening, when the temperature declines to around 24-27℃ (75-81℉). At Mount Omuro and Izu Highland, you may feel a bit cool in the early morning and at night; thus, prepare a light jacket if you intend to visit these places during these periods.

Thanks to sea winds, the perceived temperature on the Izu Peninsula tends to be lower than the temperature data tells, so it’s highly favored as a summer resort by travelers. 

Lots of Rainfall

Monthly Precipitation: 230 mm (9.1 in) from 16 rainy days

Splendid Fireworks Show

Monthly Relative Humidity: around 81%
The sultry air in August makes you sweat more even with the slightest movement, so pack extra dry sets of clothes for changing.

Though Shizuoka’s precipitation in August plunges as the rainy season ends in middle to late July, it is still at a high level. Showers are frequent. Although the duration is usually not long, it may rain intermittently in a day. In some years of August, Shizuoka possibly sees rainy weather for several consecutive days. 

The humid air, caused by rich rainfall, makes you sweat more easily even with the slightest movement, so pack extra dry sets of clothes for changing.

Typhoon

Shizuoka is more vulnerable to typhoons, with an average of 0.8 typhoons approaching in August. Typhoons often result in heavy downpours and strong winds, and in more severe cases, there may be secondary disasters like floods and mudslides, eventually leading to traffic paralysis and the closure of scenic spots. Therefore, regularly check typhoon warnings and make a backup plan, if you’d like to visit Shizuoka in August 2026.

Warm Sea Water

August is one of the best times to enjoy multiple water sports, as sea water temperatures reach a comfortable level, at around 24-28℃ (75-82℉). Most beach resorts in Shizuoka open till the end of the month. Below are the best beaches in Shizuoka for water fun:
1. Shirahama Ohama Beach: Its clear waters are pretty suitable for snorkeling and diving.
2. Sotoura Beach: Thanks to shallow water, it is a great destination for children to have fun; it enjoys a quiet and laid-back atmosphere.
3. Tatadohama Beach: As a venue for national surfing competition, all surfers can enjoy the joy of riding the waves.

Strolling along the Beach

Generally Rich Daylength & Sunshine Hours, Intense UV Rays 

Sunrise Time: 04:58 - 05:21
Sunset Time: 18:17 - 18:52
Daytime Hours: 12 hours 55 minutes-13 hours 54 minutes
Sunshine Hours: around 6.5 hours/day
UV Index: 9 - 11

Daily Outfits for Shizuoka Trip in August

 Plain Areas: Given Shizuoka’s hot climate in August, wear short sleeve shirts and skirts or thin sweatpants of good breathability, plus comfy casual shoes. Pack sun clothing for protection against strong sunlight, as well as cold air conditioning. Considering you may visit many shrines and temples, the clothes are better to cover your shoulders and knees.  

 Beach Areas: To perfectly match the beach flavor, Hawaii shirts, loose shirts and slippers are advised for males, while ladies can wear bright-colored beach dresses and sandals.

 Mountain Areas: August belongs to the official climbing season of Mount Fuji. For climbers, the following items are required: quick-drying short sleeve shirts, waterproof hiking pants, 3-in-1 jackets with a removable down liner, thick socks, high-top hiking shoes, sand-resistant shoe covers and alpenstocks.

Others: 
1. Raincoats are more practical for hikers, while dual-functional umbrellas for rainy and sunny days are suitable for other visitors.
2. Pack sun hats, sunglasses, sun scream and mosquito repellent.

Top Things to Do in Shizuoka in August

1. Every August, Atami hosts four spectacular fireworks shows, each of which sets off roughly 5,000 fireworks. Atami Nagisacho Park provides an unobstructed, expansive view.
2. The nearly 700-meter stretch from Mishima Taisha Shrine to Mishima Hirokoji Station comes alive with Mishima Grand Festival on August 15-17. You’ll enjoy the ornate float competition, Yoritomo Flag Raising Procession, hand-held fireworks performance, Noheibushi and Mishima Samba Dance Parade, as well as Yabusame that performers shoot an arrow while riding a horse.

Suruga Bay

3. Cruising on Suruga Bay is highly recommended to enjoy the uniquely captivating view of Mount Fuji from the sea, with refreshing sea breezes in hot summer. With luck, you may see dolphins or whales.
4. Abalones caught in July and August are at their most succulent. During your trip to the Izu Peninsula, why not pick a restaurant to savor a delicious abalone?

Useful Tips

1. Shizuoka typically witnesses more tourists in August - the summer vacation. The passenger flow may reach its peak during the Bon Festival in mid-August, one of the local longest public holidays. During this time, hotels and airline tickets are expansive and in short supply, so early reservation is a wise decision. Particularly at Mount Fuji, you will see much more climbers, as August is also its climbing season. 
2. If it rains, replace outdoor attractions with indoor ones, including Gotemba Premium Outlets, Chibimarukochan Land and Shizuoka Prefectural Museum of Art.

Shizuoka Weather by Month