Japan's Rainy Season 2025: Status, Forecasts, and Travel Tips

Today, July 18, the Japan Meteorological Agency announced that the rainy season is considered to have ended in the Kanto Koshin, Hokuriku, and southern Tohoku regions. The rainy season ended one day earlier than normal in the Kanto Koshin region, five days earlier than normal in the Hokuriku region, and six days earlier than normal in the southern Tohoku region.

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Today, on the 18th, the Japan Meteorological Agency announced that "the rainy season seems to be over in Kanto Koshin, Hokuriku, and southern Tohoku". It is the end of the rainy season in Kanto Koshin, which is 1 day earlier than normal, 5 days earlier than normal in Hokuriku, and 6 days earlier than normal in southern Tohoku.

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The Japan Meteorological Agency declared that the rainy season ended in western Japan on June 27th. This is the earliest end of the rainy season in the history of Japanese meteorological observations. It looks like this year's hot summer will be long in Japan. Please be careful.

End of the Rainy Season in Okinawa and Amami

On June 19, 2025, the Japan Meteorological Agency announced that the Amami region in Kagoshima Prefecture has reached the end of its rainy season ("tsuyu"). This marks an end to the rainy period about 10 days earlier than average and 3 days earlier than last year. The rainy season in Amami began around May 19, so this year’s tsuyu lasted about one month. Okinawa also exited the rainy season at roughly the same time.

The early end of the rainy season is due to a strong Pacific high-pressure system covering Japan. The weather forecast for the next week predicts mostly sunny days for Okinawa and Amami. Typically, these regions see the end of the rainy season in late June, but this year, it has arrived a bit earlier than usual.

Current Status and Rainfall in Other Regions

Rainy Season Start Dates (2025)

Japan’s rainy season begins in the south and moves northward. Here are the main regions and their 2025 rainy season start dates (with comparison to the average year):

Region	2025 Start	Difference from Avg.	Average
Okinawa	May 22	12 days later	May 10
Amami	May 19	7 days later	May 12
Southern Kyushu	May 16	14 days earlier	May 30
Northern Kyushu	June 8	4 days later	June 4
Shikoku	June 8	3 days later	June 5
Chugoku	June 9	3 days later	June 6
Kinki (Kansai)	June 9	3 days later	June 6
Toukai	June 9	3 days later	June 6
Kanto-Koshin	June 10	3 days later	June 7
Hokuriku	June 10	1 day earlier	June 11
Southern Tohoku	June 14	2 days later	June 12
Northern Tohoku	June 14	1 day earlier	June 15

Rainfall Trends During the Rainy Season

• Okinawa & Amami: In 2025, rainfall was average or slightly below average. The rainy season was over 10 days shorter than usual.
• Kyushu to Tohoku: Rainfall is expected to be average or slightly above average, with the heaviest rains likely from late June to early July.
• Pacific Side of Western & Eastern Japan: Rainfall may be slightly below average, but localized heavy rain is still possible.
• Northern Japan (Tohoku & Hokkaido): Rainfall is expected to be around average, with some heavy rain days, especially on the Sea of Japan side.

Average Rainfall During the Rainy Season (by Region)

• Northern Kyushu: 500–600 mm
• Kanto-Koshin & Tokai: about 300 mm
• Note: There can be significant variation each year, with some years seeing droughts and others experiencing record rainfall.

Weather Forecasts and Outlook for the End of the Rainy Season

Expected End Dates for the Rainy Season (2025)

Region	2025 Expected End	Average
Okinawa	Mid to late June	June 21
Amami	Mid to late June	June 29
Southern Kyushu	Early to mid July	July 15
Northern Kyushu	Mid July	July 19
Shikoku	Mid July	July 17
Chugoku	Mid July	July 19
Kinki (Kansai)	Mid July	July 19
Toukai	Mid July	July 19
Kanto-Koshin	Mid July	July 19
Hokuriku	Mid to late July	July 23
Southern Tohoku	Mid to late July	July 24
Northern Tohoku	Mid to late July	July 28

In 2025, the Pacific high-pressure system is expected to strengthen, so the rainy season may end earlier than usual for regions from Kyushu to Tohoku—possibly in early July. Some areas may see the end of the rainy season as early as late June.

Upcoming Weather Trends

• From late June, sunny and hot days are expected nationwide due to the Pacific high. Extreme heat is likely.
• Just before and after the end of the rainy season, humid air from the south may cause localized heavy rain and thunderstorms. Stay alert.
• At the end of the rainy season, there is a higher risk of torrential rainfall and "linear rainbands," which can cause landslides and river flooding. Be cautious.

Travel Tips for International Visitors

1. Traveling During the Rainy Season:
   • Okinawa and Amami have already exited the rainy season, so now is the perfect time to enjoy beaches and marine activities.
   • For Honshu (especially Kansai, Kanto, and Tohoku), the rainy season is expected to end from early to mid-July. After that, summer will be in full swing.
   • During the rainy season, sudden heavy rain and high humidity are common even in urban areas. Always carry a compact umbrella or raincoat, and check the weather forecast regularly.
2. Heat and Heatstroke Prevention:
   • After the rainy season ends, temperatures will rise rapidly. Stay hydrated, take breaks in the shade, and wear hats or sunglasses to avoid heatstroke.
3. Disaster Preparedness:
   • At the end of the rainy season and just after, the risk of heavy rain, landslides, and river flooding increases. If visiting mountainous or riverside areas, pay attention to the latest weather and evacuation information from local authorities.
4. Flexible Travel Planning:
   • Weather can change suddenly, so have backup plans for indoor activities such as museums or shopping malls in case of rain.

Summary

• In 2025, Okinawa and Amami exited the rainy season earlier than usual, with sunny and hot weather continuing.
• For the rest of Japan, the rainy season is expected to end from early to mid-July, with rainfall amounts around or slightly above average, and the season itself slightly shorter than usual.
• After the rainy season, be prepared for extreme heat and potential heavy rain disasters.
• Travelers should check the latest weather information and plan flexibly according to the weather conditions.

Japan’s rainy season varies greatly by region. For a safe and comfortable trip, make use of weather forecasts and local information, and always stay alert to weather-related risks.

2025 Japan Regional Rainy Season End (Tsuyu-Ake) Forecast

Today, on July 18, the Japan Meteorological Agency announced that "the rainy season seems to be over in Kanto Koshin, Hokuriku, and southern Tohoku". It is the end of the rainy season in Kanto Koshin, which is 1 day earlier than normal, 5 days earlier than normal in Hokuriku, and 6 days earlier than normal in southern Tohoku.

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According to the Japan Meteorological Agency, the rainy season ended in western Japan on June 27th. 

This is the earliest end of the rainy season in the history of Japanese meteorological observations. 

It looks like the hot summer will be long in Japan this year. Please be careful.

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The end of the rainy season (Tsuyu-Ake) in Japan for 2025 is expected to occur on the following dates by region, based on the latest forecasts from the Japan Meteorological Agency and major weather information sites.

Region	Expected End of Rainy Season	Average Year	Last Year
Okinawa	Around June 21	Around June 20	Around June 20
Amami	Around June 29	Around June 22	Around June 22
Southern Kyushu	Around July 15	Around July 16	Around July 16
Northern Kyushu	Around July 19	Around July 17	Around July 17
Shikoku	Around July 17	Around July 17	Around July 17
Chugoku	Around July 19	Around July 21	Around July 21
Kinki	Around July 19	Around July 18	Around July 18
Tokai	Around July 19	Around July 18	Around July 18
Kanto-Koshin	Around July 19	Around July 18	Around July 18
Hokuriku	Around July 23	Around July 31	Around July 31
Southern Tohoku	Around July 24	Around August 1	Around August 1
Northern Tohoku	Around July 28	Around August 2	Around August 2

Please note that these are forecasts and actual dates may vary depending on weather conditions.

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Regional Summer Weather and Temperature Forecasts After the Rainy Season

Okinawa & Amami area

• Weather: After the rainy season, full-fledged summer arrives with many sunny days. This is also the season when typhoons become more frequent, so please pay attention to the latest weather information.

• Temperature: Daytime highs often exceed 30°C (86°F) with high humidity. Heatstroke precautions are essential.

Kyushu, Shikoku, Chugoku area

• Weather: After the rainy season, strong sunshine continues, and consecutive extremely hot days (over 30°C/86°F) are expected. Localized thunderstorms (evening showers) are also likely.

• Temperature: Temperatures may reach around 35°C (95°F), and in urban areas, tropical nights (when temperatures stay above 25°C/77°F at night) are expected.

Kinki, Tokai, Kanto-Koshin area

• Weather: After the rainy season, the Pacific high pressure brings prolonged sunny weather and the peak of summer. Sudden thunderstorms or heavy downpours may occur due to unstable atmospheric conditions in the afternoon.

• Temperature: Major cities like Osaka, Nagoya, and Tokyo may see many days above 35°C (95°F) with high humidity, making it feel even hotter. Frequent hydration and proper use of air conditioning, both indoors and outdoors, are important.

Hokuriku & Tohoku area

• Weather: The end of the rainy season is slightly later here, but once it ends, sunny days increase. On the Sea of Japan side, the Foehn phenomenon can cause extremely high temperatures.

• Temperature: Days over 30°C (86°F) will become more frequent. In inland areas like Yamagata and Niigata, temperatures can approach 35°C (95°F). While northern Tohoku can be relatively cool, recent years have also seen extremely hot days.

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Summer Climate Advice for International Visitors

• Heatstroke Prevention: Japanese summers are very humid, making it feel hotter than the actual temperature. Stay hydrated, replenish salts, and take regular breaks.

• Clothing: Light, breathable clothing is recommended. Since air conditioning can be strong indoors, carrying a light jacket or shawl is helpful.

• UV Protection: The sun is very strong, so use hats, sunglasses, and sunscreen.

• Be Prepared for Sudden Weather Changes: Sudden thunderstorms or heavy rain can occur in the afternoon, so carrying a folding umbrella is convenient.

• Typhoon Information: From late July through August is typhoon season, so check the latest weather updates before and during your trip.

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Summary

In 2025, the rainy season is expected to end in late June in Okinawa, from mid to late July in regions from Kyushu to Kanto-Koshin, and in late July in Tohoku. After the rainy season, full-fledged summer arrives nationwide, with many days of extreme heat and tropical nights. Japanese summers are hot and humid, so be mindful of heatstroke and sudden weather changes. Please take adequate precautions for a safe and comfortable stay in Japan.

2025年黃金週（GW）期間日本各地區每日天氣預報

2025年的日本黃金週（4月26日～5月6日），全國大多以晴天為主，但期間內也有天氣驟變或降雨的可能，各地區的天氣趨勢有所不同。以下將從北海道到沖繩，針對主要地區，詳細介紹每日的天氣趨勢及氣溫預測。

北海道・東北地區

• 4月26日（六）
  北海道至關東地區大氣非常不穩定，需注意雷擊、強風、冰雹及突如其來的強降雨。東北地區同樣需注意天氣驟變。
• 4月27日（日）～29日（二，昭和日）
  北海道、東北地區天氣週期性變化。雖有晴朗時段，但受冷空氣影響，日本海側可能有降雨。
• 4月30日（三）～5月2日（五）
  大致晴朗，氣溫上升，北海道約15～20℃，東北多為20℃以上。
• 5月3日（六，憲法紀念日）～5月5日（一，兒童節）
  雲量增多，部分地區有雨，特別是3～4日降雨機率較高。
• 5月6日（二，補假）
  本州大致晴朗，北海道、東北也有晴天機會，但需注意局部陣雨。
• 氣溫趨勢
  整體略高於往年，後半期北海道也有20℃左右，東北部分地區甚至接近25℃。

關東・甲信地區

• 4月26日（六）
  大氣不穩定，午後有雷雨、強風及突如其來的強降雨。
• 4月27日（日）～29日（二）
  以晴天為主，29日可能短暫有雨或多雲。
• 4月30日（三）～5月2日（五）
  大致晴朗，最高氣溫約25℃，部分地區達夏日標準。
• 5月3日（六）～5月5日（一）
  雲量增多，3～4日有降雨可能，5日天氣逐漸好轉。
• 5月6日（二）
  以晴天為主，局部可能有陣雨。
• 氣溫趨勢
  前半期約20℃出頭，後半期多為25℃以上，需注意中暑與防曬。

東海・北陸地區

• 4月26日（六）
  東海地區晴朗，適合出遊；北陸地區則有多雲或降雨可能。
• 4月27日（日）～29日（二）
  多為晴天，29日可能短暫有雨。
• 4月30日（三）～5月2日（五）
  大致晴朗，2日東海、近畿部分地區可能有雨。
• 5月3日（六）～5月5日（一）
  雲量增多，3～4日部分地區有雨，5日天氣回穩。
• 5月6日（二）
  晴天，適合出遊。
• 氣溫趨勢
  後半期多為25℃以上，體感悶熱。

近畿・中國・四國地區

• 4月26日（六）
  大致晴朗，適合出遊。
• 4月27日（日）～29日（二）
  以晴天為主，29日部分地區可能有雨。
• 4月30日（三）～5月2日（五）
  持續晴朗，2日近畿可能有雨。
• 5月3日（六）～5月5日（一）
  雲量增多，3～4日部分地區有雨，5日天氣回穩。
• 5月6日（二）
  晴天。
• 氣溫趨勢
  25℃以上的夏日天數增多，濕度高，體感悶熱。

九州地區

• 4月26日（六）
  晴天，適合出遊。
• 4月27日（日）～29日（二）
  以晴天為主，29日可能短暫有雨。
• 4月30日（三）～5月2日（五）
  大致晴朗，2日部分地區有雨。
• 5月3日（六）～5月5日（一）
  雲量增多，3～4日部分地區有雨，5日天氣回穩。
• 5月6日（二）
  晴天。
• 氣溫趨勢
  多為25℃以上，體感悶熱，需加強中暑對策。

沖繩地區

• 4月26日（六）～5月6日（二）
  受鋒面及潮濕空氣影響，多為多雲或雨天，黃金週期間有可能進入梅雨季。雖偶有晴天，但整體建議攜帶雨具。
• 氣溫趨勢
  多為25℃左右，濕度高，悶熱感明顯，早晚氣溫也較高。

總結與注意事項

• 全國趨勢
  前半段（4月26日～5月1日）多為高壓籠罩，晴天居多。後半段（5月2日～6日）雲量增多，尤其3～4日全國多地有雨。
• 氣溫上升與防中暑
  後半期氣溫上升，關東以西多為夏日。由於身體尚未適應高溫，請注意補充水分、適時休息，並做好防曬措施。
• 沖繩有梅雨可能
  黃金週期間沖繩有可能進入梅雨，多為多雲或雨天，建議出遊前確認最新天氣資訊。

各地區每日天氣簡表

日期	北海道・東北	關東・甲信	東海・北陸	近畿・中國・四國	九州	沖繩
4/26（六）	雷雨、不穩定	雷雨、不穩定	晴天	晴天	晴天	多雲、雨
4/27（日）	晴時偶雨	晴天	晴天	晴天	晴天	多雲、雨
4/28（一）	雨、多雲	雨、多雲	雨、多雲	雨、多雲	雨、多雲	雨
4/29（二）	雨、多雲	多雲、偶雨	多雲、偶雨	多雲、偶雨	多雲、偶雨	雨
4/30（三）	晴天	晴天	晴天	晴天	晴天	多雲、雨
5/1（四）	晴天	晴天	晴天	晴天	晴天	多雲、雨
5/2（五）	多雲、偶雨	多雲、偶雨	局部有雨	局部有雨	局部有雨	雨
5/3（六）	局部有雨	局部有雨	局部有雨	局部有雨	局部有雨	雨
5/4（日）	局部有雨	局部有雨	局部有雨	局部有雨	局部有雨	雨
5/5（一）	晴時偶雨	晴時偶雨	晴時偶雨	晴時偶雨	晴時偶雨	雨
5/6（二）	晴時偶雨	晴時偶雨	晴時偶雨	晴時偶雨	晴時偶雨	雨

出遊建議

• 即使多為晴天，也需注意天氣驟變、雷雨及強風。
• 氣溫高，請做好中暑及防曬措施。
• 沖繩及西日本地區注意梅雨及悶熱，攜帶雨具與防暑用品。
• 請隨時關注最新天氣預報，靈活調整行程。

今年黃金週全國多為適合出遊的天氣，但請多加留意天氣驟變與高溫，祝您有個愉快的假期！