Weekly Forecast: Be careful of the intense heat that continues every day and sudden changes in the weather. Heavy rain is expected in Hokkaido in the middle of the week around the 15th.

2026/07/13 07:53

From now on, the area around Japan will continue to be covered in warm air. In the regions west of the Tokai region, it will be sunny every day, and with the addition of strong sunlight, the expected maximum daytime temperature is expected to be around 35 degrees Celsius on many days. Since the temperature does not drop much at night, the risk of heatstroke increases both day and night. Please take thorough measures to prevent heat stroke, such as staying hydrated frequently and taking adequate breaks.
It is expected that there will be many days around 30c in northern and eastern Japan as well. Kanto and the Pacific side of Tohoku are susceptible to the influence of humid air from the east, so it tends to be cloudy and the days are likely to continue to be hot and humid.





Looking at the weekly weather mark, western Japan has sunny weather every day, and it seems that there will be some days when the sun will reach eastern and northern Japan as well. However, in the afternoon, atmospheric conditions become unstable due to rising temperatures during the day and humid air, and in the afternoon, there is a possibility that sudden rain called ``guerrilla thunderstorms'', thunderstorms, lightning strikes, and violent gusts such as tornadoes may occur mainly inland and along mountains. In particular, if you enjoy outdoor leisure activities such as mountains or rivers, please make every effort to ensure your safety if you see signs of sudden changes in the weather, such as seeing thick black clouds or hearing thunder.

In the middle of the week, from the 15th (Wednesday) to the 16th (Thursday), a low pressure system similar to Typhoon No. 9 is expected to approach Hokkaido. There is a risk of heavy rain in Hokkaido, so please pay attention to the latest weather information that will be updated in the future.

Weather forecast for today, the 13th (Monday): Beware of dangerous heat that exceeds body temperature in western Japan; beware of sudden changes in the weather in the afternoon

2026/07/13 06:59

Today, the 13th (Monday), will be the start of the week, and western Japan will be covered in high pressure, making it sunny in many places, making it extremely hot.
It looks like there will be many cloudy and rainy days in Hokuriku, Kanto, and Tohoku.



Today, the 13th (Monday), a heatstroke warning alert has been announced for 14 prefectures from the Kinki region to the Kyushu and Amami regions. Dangerously hot weather is expected to occur mainly in western Japan, with predicted maximum temperatures of 38 C in Hita City, Oita Prefecture, and 37 C in Yamaguchi and Hitoyoshi City, Kumamoto Prefecture, which could reach dangerous levels that could exceed body temperature. Additionally, the temperature will not drop much at night, and there are likely to be some places where the minimum temperature from tonight until tomorrow morning will be over 25 degrees Celsius, making it a tropical night.

Please be more careful about heat stroke and take thorough measures such as drinking water frequently, using air conditioning, and taking appropriate breaks.



In the afternoon, atmospheric conditions will be unstable in western Japan, especially inland and along the mountains, due to rising daytime temperatures and moist air. Even in areas where there is no umbrella symbol in the weather forecast, please be careful of sudden rain or thunderstorms in the afternoon, as well as strong gusts such as lightning or tornadoes.

Hokuriku, Kanto, and Tohoku will have a lot of clouds, and it looks like it will be a rainy day. In Hokuriku, please be careful of heavy rain accompanied by localized thunder. The maximum daytime temperature is not expected to be as severe as in western Japan, but it will be a hot and humid day with many places around 30 degrees Celsius.

Weather for tomorrow 13th (Monday) Heavy rain in Tohoku and Hokuriku, extreme heat warning in western Japan

2026/07/12 18:03

Western Japan is expected to be covered in high pressure, and a low pressure system with cold air in the sky is expected to be located on the southern coast of Hokkaido. Additionally, a front that is not depicted on weather maps is expected to form from the southern Tohoku region to the Kanto region.



Western Japan is sunny and the strong sun shines down. Dangerous heat exceeding body temperature is expected in inland areas. Temperatures are high, especially in Kyushu and China, so please be careful of heat stroke.
It will be rainy in southern Tohoku, Hokuriku, and Kanto. Rain clouds are likely to develop, especially on the Sea of Japan side, and there is a risk of heavy rain. Please take precautions against landslides, river flooding, and road flooding. There are a lot of clouds in Hokkaido, but the unstable conditions are expected to improve compared to today. However, be careful of rain showers along the mountains.

[Breaking news] Rainy season ends in Shikoku region; beware of intense heat

2026/07/12 12:19

Today, the 12th, the
meteorological observatory announced that the rainy season appears to have ended in the Shikoku region.

Shikoku region: Around July 12th (5 days earlier than normal)

*The announcement of the end of the rainy season is preliminary. It may be revisited and revised in the fall.

Today, the Shikoku region is covered by the Pacific anticyclone and is mostly sunny. In Takamatsu City, Kagawa Prefecture, the temperature was 33.6 degrees Celsius by 12:00, making it extremely hot as the rainy season ends.



For this reason, heat stroke warning alerts have been announced in multiple regions in western Japan.



For the next week, the Shikoku region is expected to be covered by the Pacific anticyclone and have many sunny days.



The middle of the week is expected to be particularly hot, with maximum daytime temperatures exceeding body temperature. Please take care of your health.

High temperatures will continue in eastern and western Japan from now until around the 18th. Be careful of heatstroke.

2026/07/12 06:33

On the 11th, the Japan Meteorological Agency announced general weather commentary regarding high temperatures.

From around the 14th (Tuesday) to the 18th (Saturday) in eastern Japan, and around the 18th (Saturday) in western Japan, there will be days covered by high pressure and warm air, so it is expected that there will be some extremely hot days with maximum temperatures of 35 degrees Celsius or higher.
Please take care of your health, such as preventing heat stroke, and managing your crops and livestock.



Looking at the forecast for the maximum temperature for the next week, it looks like Fukuoka Prefecture will continue to experience extremely hot days with temperatures above 35c until around Wednesday the 15th. There will also be days when the temperature is 38 C or 37 C, which is higher than your body temperature, so it is essential to take precautions against heatstroke.
Tokyo, Nagoya, and Osaka will initially experience midsummer days with temperatures above 30c, and from around the 14th (Tuesday) it is expected to become an extremely hot day with temperatures above 35c.
Especially in Tokyo, the temperature will rise from 30 degrees Celsius on the 13th (Monday) to 37 degrees Celsius on the 14th (Tuesday), rising by 7 degrees Celsius over the next day, so the temperature will rise rapidly as the body is still not used to the heat.
Please take precautions against the heat by staying hydrated frequently and using the air conditioner appropriately when indoors.

Also, please check the "Heatstroke Warning Alert" issued jointly by the Japan Meteorological Agency and the Ministry of the Environment, and consider refraining from outdoor activities as much as possible on the days that are announced in the target area.

Typhoon No. 9: In Okinawa and Amami, watch out for high waves and strong winds even after the typhoon has left

2026/07/11 23:23

Large and strong Typhoon No. 9 is currently in the East China Sea, moving northwest at a speed of approximately 30 kilometers per hour.

Today, the 11th (Saturday), heavy rain of 45.0mm was observed in Shimojishima, Miyakojima City, Okinawa Prefecture, in the hour until 8:55, and the daily precipitation until 9:00pm today was 175.0mm.
The maximum instantaneous wind speed was 45.3 m/s in Kitahara, Kumejima Town, Shimajiri District, Okinawa Prefecture in the morning.

#Typhoon No.9 11th (Saturday) 21:00
==================
Size large
Strength strong
Movement North-northw
Center location East China Sea
Movement Northwest 30km/h
Central pressure 950hPa
Maximum wind speed 40m/s (near the center)
Maximum instantaneous wind speed 55m/s
========================



Typhoon No. 9 is expected to make landfall in central China tomorrow, the 12th (Sunday), and turn into an extratropical cyclone on the 15th (Wednesday).
In the Okinawa and Amami regions, the center of the typhoon is gradually moving away, but please continue to be wary of high waves accompanied by swells into tomorrow, the 12th (Sunday).
Also, even if the rain stops, the windy conditions are expected to continue. Please be careful of strong winds.





[Wave forecast]
Wave height expected for tomorrow, the 12th (Sunday)
Amami region 6 meters with swells
Okinawa region 9 meters with swells

[Wind forecast]
Maximum wind speed (maximum instantaneous wind speed) expected for tomorrow, the 12th (Sun)
Amami region 15 meters (25 meters)
Okinawa region 20 meters (30 meters)

Typhoon No. 9: In Okinawa and Amami, watch out for high waves and strong winds even after the typhoon has left

2026/07/11 23:08

Large and strong Typhoon No. 9 is currently in the East China Sea, moving northwest at a speed of approximately 30 kilometers per hour.

Today, the 11th (Saturday), heavy rain of 45.0mm was observed in Shimojishima, Miyakojima City, Okinawa Prefecture, in the hour until 8:55, and the daily precipitation until 9:00pm today was 175.0mm.
The maximum instantaneous wind speed was 45.3 m/s in Kitahara, Kumejima Town, Shimajiri District, Okinawa Prefecture in the morning.

#Typhoon No.9 11th (Saturday) 21:00
==================
Size large
Strength strong
Movement North-northw
Center location East China Sea
Movement Northwest 30km/h
Central pressure 950hPa
Maximum wind speed 40m/s (near the center)
Maximum instantaneous wind speed 55m/s
========================



Typhoon No. 9 is expected to make landfall in central China tomorrow, the 12th (Sunday), and turn into an extratropical cyclone on the 15th (Wednesday).
In the Okinawa and Amami regions, the center of the typhoon is gradually moving away, but please continue to be wary of high waves accompanied by swells into tomorrow, the 12th (Sunday).
Also, even if the rain stops, the windy conditions are expected to continue. Please be careful of strong winds.





[Wave forecast]
Wave height expected for tomorrow, the 12th (Sunday)
Amami region 6 meters with swells
Okinawa region 9 meters with swells

[Wind forecast]
Maximum wind speed (maximum instantaneous wind speed) expected for tomorrow, the 12th (Sun)
Amami region 15 meters (25 meters)
Okinawa region 20 meters (30 meters)

Weather for tomorrow 12th (Sunday): Heavy rain in northern Japan, heatstroke warning in Kyushu!

2026/07/11 18:25

Typhoon No. 9 is expected to leave Okinawa and move toward the continent. Western Japan will be within an area of high pressure. On the other hand, a pressure trough is expected to pass over northern Japan.



The weather in the Nansei Islands is improving, but high waves are making it dangerous. Please stay away from the coast.
The weather in Kyushu continues to be sunny, and the temperature during the day is expected to exceed 35 degrees Celsius, reaching dangerously close to 40 degrees Celsius. In many areas, the risk of heatstroke has reached the maximum alert level, so please take sufficient measures. Shikoku and China will also be hot with many sunny spells, so please be careful of heatstroke.
Clouds will likely spread over the Kinki, Tokai, and Kanto regions. Although there will be little sunshine, the temperature is expected to rise to around 30c during the day. There is a possibility of showers in the Kanto region in the afternoon, so a folding umbrella is a good idea.
Northern Japan and Hokuriku are prone to rain. There is a risk of locally heavy rain, especially on the Sea of Japan side of northeastern Japan. Be wary of landslides, rising river waters, and flooding of low-lying areas. Even though it's raining, the temperature is high, and it looks like it's going to be an uncomfortable heat.

[Celestial show] Tomorrow the moon will approach Mars!! What is the weather like for Aldebaran

2026/07/11 11:56

#Moon approaches Mars!!Aldebaran also pay attention to the eastern sky before sunrise
Tomorrow, the 12th (Sunday), the moon approaches Mars!!
Please pay attention to the eastern sky before sunrise.
The moon has passed its waning quarter and is getting thinner day by day, and tomorrow, the 12th (Sunday), it will approach Mars.
The visible position of Mars is also changing day by day.
Tomorrow, the 12th (Sunday), the thinner Moon will be visible to the left of Mars.
Aldebaran (Taurus) is a first-magnitude star that also shines red near Mars.
How about observing the slender Moon, Mars, and Aldebaran together



#What is the weather for tomorrow
Typhoon No. 9 is expected to make landfall from the East China Sea to central China tomorrow, the 12th (Sun).
The Nansei Islands, mainly in Okinawa, are experiencing severe flooding and heavy flooding with swells, and this condition is expected to continue into tomorrow, the 12th (Sunday).
Please be extremely cautious of high waves accompanied by swells.



At dawn, the Pacific side of western Japan will be cloudy due to moist air, and there will be some places where it will rain.
The Sea of Japan side of western Japan will be clear and it will be possible to observe the approach of the Moon and Mars.
There will be a chance to observe it through the gaps in the clouds near the Kii Peninsula.
Also, a low pressure system is expected to move into northern Japan, and the Tokai region and Hokkaido region will be covered in clouds.
There will be places in northern Kanto, Tohoku, and Hokkaido on the Sea of Japan side where it will rain.
On the Sea of Japan side of northern Japan, there is a risk of heavy rain with localized thunderstorms, leading to warning-level heavy rain.
Please be careful of heavy rain disasters.

[Latest typhoon information] Large and strong typhoon No. 9 approaches Sakishima Islands - strict warning against strong winds until tonight

2026/07/11 07:42

Typhoon No. 9, a large and strong typhoon, was located about 70 km south-southwest of Miyakojima at 6pm on the 11th, and was moving northwest at a speed of about 20 km per hour. The atmospheric pressure at the center is 940 hectopascals, the maximum wind speed near the center is 40 m/s, and the maximum instantaneous wind speed is 60 m/s, with wind speeds of over 25 m/s within 390 km to the northeast and 330 km to the southwest of the center.



It is expected to maintain its strength and approach the Sakishima Islands by the afternoon of the 11th. In the Okinawa region, please remain on high alert for strong winds, high waves, landslides, flooding of low-lying areas, rising and overflowing rivers, and high tides into tonight, and continue to be on high alert on the 12th. People in the Amami region should be on high alert for high waves until the 11th, and southern Kyushu should be on high alert for the 11th.


[Wind Forecast]
There are strong winds in the Okinawa region. The wind will continue to get stronger, and there will be strong winds on the 11th.
Maximum wind speed expected on the 11th (maximum instantaneous wind speed)
Amami region 20 meters (30 meters)
Okinawa region 40 meters (60 meters)
Maximum wind speed expected on the 12th (maximum instantaneous wind speed)
Amami region 15 meters (25 meters)
Okinawa region 20 meters (30 meters)

[Wave forecast]
In the Okinawa and Amami regions, there will be strong waves with swells on the 11th. It is expected that there will be heavy swells in southern Kyushu as well.
Wave height expected on the 11th
Southern Kyushu 6 meters with swells
Amami region 9 meters with swells
Okinawa region 13 meters with swells
Wave height expected on the 12th
Southern Kyushu 5 meters with swells
Amami region 6 meters with swells
Okinawa region 9 meters with swells
On the 12th, there will be a fierce storm in the Okinawa region and a big storm in the Amami region.

[Rain Forecast]
On the 11th, there will be heavy rain in the Sakishima Islands, with torrential rain accompanied by thunder and extremely heavy rain.
The predicted precipitation for the 24-hour period from 6:00 am on the 11th to 6:00 am on the 12th is expected to be 250 mm in the Okinawa region.
If a linear precipitation band occurs, there is a risk that there will be even more rainfall locally.