Weekly weather: Rainy skies continue in eastern and western Japan. Be careful of heatstroke in Okinawa and Amami as the rainy season ends.

2026/07/02 17:47

The weather for the next week is expected to be sunny in many places in northern and eastern Japan on Saturday the 4th, with many cloudy and rainy days after that.
Western Japan will continue to experience rainy days after the weekend, and there will likely be periods of sunshine in the middle of next week.
Okinawa/Amami, where the end of the rainy season has already been announced, is expected to be covered in high pressure and have many sunny days.



Tomorrow, the 3rd (Friday), the low pressure system will move away to the east of Japan, and the seasonal rain front will move south from near Honshu. On the other hand, there is a high pressure system near the Chishima Islands, which is expected to cover the area around Hokkaido.

Hokkaido will be sunny mainly on the Sea of Japan side.
There will be a trough in the atmospheric pressure near Honshu, and clouds are expected to spread easily.
It will rain in places in southern Tohoku, Hokuriku, Kanto-Koshin, and Tokai. Even if it's not raining when you go out, it's safe to have rain gear.
Although clouds tend to spread over the Kinki, Chugoku, and Shikoku regions, there are likely to be periods of sunshine.
In Kyushu, the rainy weather will continue due to the influence of the rainy season front.
Okinawa/Amami, where the end of the rainy season has already been announced, is expected to be covered in high pressure and clear skies.



On the 4th (Saturday), western Japan will continue to be affected by the front and it will rain. There will be periods of sunshine in northern and eastern Japan.

From the 5th (Sunday) to the 6th (Monday), a front will remain stationary near Honshu, bringing rain to western and eastern Japan. It is likely that the rain will become heavier in some areas, so please check the latest information and pay attention to the direction of the rain.

From the 7th (Tuesday) onwards, clouds will tend to spread over western Japan, but it will be less affected by the front and there will likely be periods of sunshine. The front will move northward, bringing rainy weather to northern and eastern Japan. There will also be a trough in the atmospheric pressure in Hokkaido, and it is likely to rain from the 8th (Wednesday) to the 9th (Thursday).

Typhoon Barbie occurred in the Marshall Islands today, the 2nd (Thursday). Although the typhoon's path still varies, there is a possibility that it will affect Okinawa in the second half of next week. Please pay attention to future information.




Forecasted maximum temperatures will be sunny and higher than normal in northern Japan during the first half of the period, and will be lower than normal in places in eastern and western Japan.
In Kyushu and Okinawa, it is likely to be a midsummer day with temperatures exceeding 30c every day.
On rainy and humid days, it is difficult for sweat to evaporate and body temperature does not drop, increasing the risk of heatstroke. Even on days with little sunlight, please take precautions against heat stroke, such as hydrating frequently and taking breaks.

[Latest Typhoon Path Forecast] Typhoon No. 9 Barbie will occur. Will a double typhoon occur tonight

2026/07/02 11:54

At 9 a.m. today, the 2nd (Thursday), a developing tropical cyclone in the Marshall Islands became Typhoon No. 9 (Barbie).
There is another tropical cyclone in the South China Sea, which is likely to develop into a typhoon tonight and become a double typhoon.



#Typhoon No. 9 (Barbie) Today 2nd (Thursday) 9:00 am
Center location Marshall Islands
Moving West 15 km/h
Central pressure 1000 hPa
Maximum wind speed 18 m/s (near the center)
Maximum instantaneous wind speed 25 m/s
Strong wind area Northeast side 330 km
Southwest side 220 km

#Typhoon No. 9 very strong After that, it also affected Japan.
As of 9 a.m. today, Thursday, the 2nd, Typhoon No. 9 is moving westward over the Marshall Islands, accompanied by strong winds.
Typhoon No.9 is expected to continue to intensify as it moves northwest through the Marshall Islands, and on the 4th (Saturday) it will intensify into strong force near the Truk Islands, bringing with it strong winds.
From the 5th (Sunday) to the 7th (Tuesday), it will move westward over the Mariana Islands and will further develop into a very strong force with stormy winds.
The central pressure at the peak is expected to be 935hPa, and the maximum wind speed near the center is expected to reach 50m/s.
After that, there is a risk that it will affect Japan, so please be careful about the latest information.

#Will a double typhoon occur tonight



As of 9:00 a.m. today, the 2nd (Thursday), there is a developing tropical cyclone in the South China Sea that is moving westward.
It is expected to develop into a typhoon in the South China Sea as early as tonight.
Then, it will slowly move north through the South China Sea, move northward through southern China on the 5th (Sunday), and reach central China on the 6th (Monday), turning into a tropical cyclone.
If you are planning to travel to this area, please keep an eye on the latest information.

Will two typhoons occur within the next 24 hours Pay close attention to the predicted course

2026/07/02 08:02

Today, the 2nd (Thursday), there are two tropical cyclones A and B near the Marshall Islands in the South China Sea, which are expected to develop into typhoons within the next 24 hours.

Tropical Cyclone A, which is located in the South China Sea, is expected to move westward in the South China Sea, pass through the Gulf of Tonkin, and make landfall in South China. After landfall, it is expected to turn into a tropical cyclone again around the 6th (Monday). There seems to be no direct impact on areas near Japan.

On the other hand, Tropical Depression B, which is currently located in the Marshall Islands, will continue to develop and move westward, gradually becoming accompanied by stormy winds with average wind speeds of 25 m/s or more. It is expected to approach the Mariana Islands around the 6th (Monday), and it is expected to be very strong, with a predicted central pressure of 935 hPa and maximum wind speed near the center of 45 m/s.

The course of the typhoon has not yet been determined, but depending on the typhoon's path, there is a possibility that the typhoon will approach Okinawa from next week onwards, resulting in severe stormy weather. Please pay close attention to the latest typhoon information that will be updated in the future.

[Last-minute forecast for linear rain belt] Linear rain belt is likely to occur in Nagasaki and Saga prefectures within the next 3 hours. Strict alert for heavy rain disasters such as landslides

2026/07/01 22:29

Just after 9:30 p.m. today (Thursday), the Japan Meteorological Agency announced an immediate forecast for a linear precipitation band, stating that there is an increasing possibility that a linear precipitation band will form in northern Nagasaki Prefecture within the next three hours. In addition, just after 10 p.m., a preliminary report was announced stating that there was an increased possibility of a linear precipitation band forming within the next three hours in northern Saga Prefecture.

The rain cloud radar shows very active rain clouds hanging over Nagasaki Prefecture in northern Kyushu. In Sasebo City, Nagasaki Prefecture, heavy rain of 31.0 mm per hour was observed as of 9:40 p.m., and there are areas in Nagasaki Prefecture and Saga Prefecture where a Level 4 landslide warning has been announced. In northern Kyushu, a Level 3 heavy rain warning has been announced for Fukuoka, Saga, and Nagasaki prefectures.



If linear precipitation bands occur in the future, the risk of life-threatening heavy rain disasters will rapidly increase. Please be extremely cautious of landslides, flooding of low-lying areas, rising water levels and flooding of rivers, etc.

Please avoid approaching dangerous areas such as rivers and cliffs, and take appropriate evacuation actions in accordance with evacuation information issued by local governments. If it is difficult to evacuate, please try to ensure your safety by moving to a higher place such as the second floor of your home or higher.

Weather for tomorrow 2nd (Thursday): The area of rain will further expand...

2026/07/01 17:45

A low-pressure system on top of the seasonal rain front is expected to pass over the southern coast of Honshu.



Rain is falling over a wide area from Kyushu to southern Tohoku due to the influence of the rainy season front and low pressure, and the heat seems to be calming down. The rain in western Japan will subside in the morning, but clouds will likely spread in the afternoon as well. Please be careful of heavy rain and thunderstorms mainly on the Pacific side. The rain is expected to increase in the Kanto region during rush hours, with the peak expected to be in the morning. There is a risk of strong winds and heavy rain along the coast. Hokkaido will be covered in high pressure and will have many sunny days. Please be careful of sudden rain in the afternoon along the mountains.

Weather for tomorrow 2nd (Thursday): The area of rain will further expand...

2026/07/01 17:45

A low-pressure system on top of the seasonal rain front is expected to pass over the southern coast of Honshu.



Rain is falling over a wide area from Kyushu to southern Tohoku due to the influence of the rainy season front and low pressure, and the heat seems to be calming down. The rain in western Japan will subside in the morning, but clouds will likely spread in the afternoon as well. Please be careful of heavy rain and thunderstorms mainly on the Pacific side. The rain is expected to increase in the Kanto region during rush hours, with the peak expected to be in the morning. There is a risk of strong winds and heavy rain along the coast. Hokkaido will be covered in high pressure and will have many sunny days. Please be careful of sudden rain in the afternoon along the mountains.

Heavy rain and thunderstorms in western Japan; strict alert for landslides through tomorrow 2nd

2026/07/01 12:30

The front is moving from central China to the Kyushu region and extending to the east of Japan. Additionally, there is a frontal low pressure system near Jeju Island that is moving east-northeast.

As warm, humid air flows toward fronts and low pressure systems, rain clouds have developed from the East China Sea to the Tsushima Strait, with heavy rain accompanied by lightning of 42.5 mm/h in Izuhara, Tsushima City, Nagasaki Prefecture, and 33.5 mm/h in Mitsushima Island.




From now on, the front will slowly move north, and the low pressure above the front will move towards the Sea of Japan on the 2nd tomorrow. The rain is expected to spread to eastern Japan from this afternoon until the 2nd tomorrow.
Atmospheric conditions will be extremely unstable around fronts and low pressure systems, so heavy rain is expected to occur, with heavy rain accompanied by thunder and extremely heavy rain of over 50mm per hour.

In western Japan, there are some places, mainly in northern Kyushu, where the ground has become loose due to the rain that has fallen so far. It is expected that the rain will become heavier again through the 2nd of tomorrow, so please be extremely careful about landslides and be careful of flooding of low-lying land and rising water levels of rivers.
Also, be careful of strong gusts of wind such as lightning and tornadoes.

[Rain Forecast]
Western Japan is expected to experience heavy to very heavy rain with thunder and lightning.

#Expected amount of rain (in areas where there is a lot)
+Precipitation expected for 24 hours by noon on the 2nd tomorrow
Kinki region 120mm
Chugoku region 100mm
Shikoku region 120mm
Northern Kyushu 150mm
Southern Kyushu 150mm

July 1st (Wednesday) Beware of active rain clouds in Kyushu and Chugoku regions; heavy rain is likely to occur over a wide area tomorrow

2026/07/01 06:59

There is a low pressure system near the Sea of Okhotsk and it is moving southeast.
A front is stationary in the south of Japan, extending through the Kyushu region and into the East China Sea.

Currently, rain clouds are covering Kyushu and Shikoku due to the front.




It looks like it will rain widely from Kyushu to Tokai in the afternoon.
There is a risk of heavy rain in northern Kyushu and the Chugoku region.
In the Kanto region, there will be sunshine during the day, but there will be some places where it will rain at night.

Due to the influence of moist air flowing towards the front,
there is a risk of locally heavy rainfall.
Please be careful of lightning and gusts of wind.



From tomorrow 2nd to 3rd, the
atmospheric condition is likely to be extremely unstable due to the low pressure that is expected to form on the
front.
There is a risk of heavy rain over a wide area from Hokuriku to western Japan.
Please pay attention to the latest information.

[Marine Summary] Typhoons No. 7 and No. 8 approach, large storms near the typhoons (June 21-27, 2026)

2026/07/01 03:57

Due to the effects of the low pressure system, barges were closed throughout the Sea of Japan. In the second half of the
period, typhoons No. 7 and No. 8 approached, causing major damage in the vicinity of the typhoons.
Below is a summary of the ocean (June 21-27, 2026)



#Pressure distribution and waves
On the 21st, a low pressure system moved eastward in the Sea of Japan, causing waves to rise throughout the Sea of Japan. On the 22nd, waves continued to be high in Japanese waters. Meanwhile, to the east of Kanto, a low pressure front has formed and is moving eastward. Waves rose off the coast of Sanriku and it became a barge. From the 23rd to the 25th, Typhoon No. 7 approached the Nansei Islands. The waves increased near the typhoon and became large, with wave heights of around 7 meters. On the 26th, typhoons No.7 and No.8 headed north. Waves increased near the Nansei Islands and the southern coast of Honshu. On the 27th, Typhoon No. 8 passed near the southern coast of Kanto, and Typhoon No. 7 passed from the southern coast of western to eastern Japan. Waves were rising from the south of Japan to the Nansei Islands, with wave heights of around 5 meters.



#Sea surface temperature
Sea surface temperatures in the Japanese waters continued to be about 1c higher than normal, although the area where the sea surface temperature is much higher than normal has shrunk. In eastern Honshu, the area where sea surface temperatures are significantly higher than normal has shrunk, but temperatures continue to be higher than normal over a wide area. In the northern East China Sea, the area where sea surface temperatures are significantly higher than normal is shrinking. In the south of Japan, the area of sea where sea surface temperatures are much lower than normal is shrinking. In the south of Okinawa, sea surface temperatures continue to be lower than normal in areas. In the sea near Chichijima, the area where sea surface temperatures were significantly higher than normal decreased, but the sea surface temperatures continued to be higher than normal over a wide area.

Weather for tomorrow 1st (Wednesday): Rain in a wide area in western Japan

2026/06/30 18:25

The seasonal rain front is expected to gradually move northward and stay near Honshu.



Rain is expected to spread further east, with rain expected to cover a wide area of western Japan.
It will rain in many places in Kyushu, Shikoku, and Chugoku in the morning, and it will start raining in the afternoon in the Kinki and Tokai regions as well. Please be wary of heavy rain accompanied by thunder in Kyushu.
The Kanto region is expected to continue to be cloudy and humid. Northern Japan will be covered in high pressure and will have many sunny days, but mornings and evenings will be cool, and the temperature difference throughout the day is likely to be large.
There is a risk of sudden thunderstorms in inland Honshu due to cold and humid air in the upper atmosphere. Please bring a folding umbrella.