Weather for the week: Summer days are expected in Tokyo and Nagoya on the 19th; watch out for high waves in the Ogasawara Islands due to the approaching typhoon

2026/04/16 12:11

Over the next week, high pressure is expected to bring many sunny days in many parts of the country, and temperatures are expected to rise in many parts of the country. Especially on the weekend, the 19th (Sunday), temperatures are expected to reach 26 degrees Celsius in Tokyo and Nagoya.
Typhoon No. 4 is expected to approach the Ogasawara Islands, and there is a possibility of warning-level high waves from tomorrow, the 17th (Friday). Also, please be careful as the wind is likely to increase.



The front and low pressure system that brought rain over a wide area yesterday, the 15th (Wednesday) are moving away to the east of Japan, and high pressure is expanding from the west.
Today, the 16th (Thursday), it was raining in the morning on the Pacific side of eastern and northern Japan, but the weather is improving. Sunshine will return over a wide area in the afternoon. However, from the Tohoku region to the Kanto region, there are likely to be showers accompanied by thunder in some places, so please be careful of changes in the sky. It's safe to have it foldable when you go out.



Tomorrow, the 17th (Friday), the area around Japan will be widely covered by high pressure, and it will be sunny in many places.

In addition, Typhoon No. 4, a large and very strong typhoon, is slowly moving north near the Mariana Islands. The typhoon is expected to gradually change its direction to the northeast and move from the Mariana Islands through the waters near Ogasawara to the waters near Minamitorishima. In the Ogasawara Islands, the swells from the typhoon have turned them into barges. Please be on guard for high waves with swells from early on the night of the 17th until the 18th. The wind is also expected to increase. Please check the latest information.



A low pressure system is expected to pass near Hokkaido on the 18th (Saturday). A low pressure system is also expected to remain near the East China Sea. Clouds will spread mainly over northern and western Japan, and it will rain in Kyushu and Shikoku.

On the 19th (Sunday), the area around Japan will be covered in high pressure, and it will be sunny in many places. There will be plenty of sunshine, and even in eastern Japan, temperatures are expected to reach 26c in Tokyo and Nagoya, making it a summer day.

A low-pressure system accompanied by a front is expected to move eastward near Sakhalin from the 20th (Monday) to the 21st (Tuesday). There will be rain in some places, mainly in northern Japan, due to the influence of a front extending from a low pressure system.

On Wednesday the 22nd, the area around Japan is expected to be covered in high pressure and sunny in many places.

On the 23rd (Thursday), a low pressure system accompanied by a front is expected to move eastward from near the Yellow Sea. The weather will be downhill from the west.




Temperatures are expected to be around normal or higher than normal in many places throughout the period. The maximum temperature is expected to be similar to that of May or June in some places. On the other hand, there are days when it can still be cold in the morning, so it's a good idea to choose clothes that can be adjusted.
Also, since this is a time when people are not used to the heat, please take frequent breaks and stay hydrated to prevent heat stroke. On sunny days, it's a good idea to bring a parasol or hat when you go out.

[Marine Summary] Wave height is 5m in the east of Kanto, sea surface temperature in the Sea of Japan is 5c higher than normal (April 5th to 11th, 2026)

2026/04/16 11:19

The pressure gradient between the low-pressure front and the high-pressure front increased, and wave heights reached a maximum of 5 meters in the eastern part of Japan and the eastern Kanto region.
Sea surface temperatures in the waters of Japan were significantly higher than normal, with temperatures up to 5 C higher than normal on the western continental side.
Below is a summary of the ocean (April 5-11, 2026)



#Pressure distribution and waves
On the 5th, a front extended from the sea near Okinawa to the east of Japan, and a low pressure system moved eastward through the Sea of Okhotsk.
The gradient of atmospheric pressure increased between Japan and the high pressure system east of Japan, and wave heights reached a maximum of 5 meters in the east of Japan and the east of Kanto.
On the 8th, high pressure moved over Honshu.
A front from the low pressure area near the Chishima Islands passed through the east of Japan and extended to the south of Japan, and the gradient of pressure between it and the high pressure system increased, causing waves to rise in the seas near Japan.
On the 9th, a low pressure system moved eastward over Primorye and settled west of Hokkaido.
From the 10th to the 11th, a low pressure system accompanied by a front moved westward from the Sea of Japan to Hokkaido.
The front moved southward over Honshu, and on the 10th waves rose in the western Japan Sea, East China Sea, south and east of Japan, and on the 11th in the central and northern Japan Sea and east of Japan.



#Sea surface temperature
Sea surface temperatures in the Japanese waters were significantly higher than normal, and were up to 5 C higher than normal on the western continental side.
The fairly high sea area gradually shrunk.
The East China Sea and the waters around the Nansei Islands were at normal levels.
To the south of Japan, waters slightly higher than normal have expanded.
From off the coast of the Tokai region to the south of the Kanto region, waters slightly lower than normal have expanded.
East of Kanto was slightly higher than normal.
Off the coast of Sanriku, the sea area continued to be lower than normal, with temperatures up to 4c lower.
The sea area around Hokkaido was normal, and the sea ice area in the sea near the Chishima Islands and the Sea of Okhotsk decreased.

Weather for today, the 16th (Thursday): The weather has improved near Honshu, and summer days are expected from Kanto to Kyushu

2026/04/16 09:03

Today, the 16th (Thursday), the low pressure system will move away from the sea east of Japan, and the weather will improve in many places. It looks like there will be some rain in the Kanto and Tohoku regions until the morning, but it is expected to gradually stop.

During the day, it is expected to be warmer than normal in many places, with some places from Kanto to Kyushu experiencing summer days with temperatures above 25c. The predicted maximum temperature is 25c in Tokyo and Hiroshima, and 27c in Nagoya, which is expected to be significantly higher than yesterday. You will be able to spend the day without needing a jacket.



However, the temperature difference between morning and night tends to be large, so please dress appropriately to keep yourself in shape. Additionally, as sunlight reaches from western Japan to eastern Japan, UV rays tend to be stronger, so it is a good idea to wear sunscreen and a hat.



In the inland areas of Kanto and southern Tohoku, atmospheric conditions will become unstable in the afternoon, with the possibility of sudden rain and thunderstorms. Please be aware of changes in the sky.

[Typhoon No. 4] Warning-level high waves are likely to occur in the Ogasawara Islands from around the 17th. Be careful of high waves with swells from western Japan to the Pacific side of eastern Japan.

2026/04/15 20:25

As of 6 p.m. today, Wednesday the 15th, Typhoon No. 4, a large and very strong typhoon, is moving slowly northwest near the Mariana Islands.

#Typhoon No. 4 15th (Wed) 6:00 pm
===================
Size Large
Power: Very strong
Center location: Mariana Islands
Movement speed: Northwest Slow
Central pressure: 935hP a
Maximum wind speed 45m/s (near the center)
Maximum instantaneous wind speed 65m/s
==================

Typhoon No. 4 will continue to move northward tomorrow, the 16th (Thursday), and is expected to gradually change its course to the east from the 17th (Friday).
Typhoon No. 4 is expected to move over the sea away from the Ogasawara Islands to the east, but it is expected to be accompanied by swells in the sea near the Ogasawara Islands tomorrow, the 16th. Around the 17th, waves are expected to reach a height of over 6 meters, and there is a risk that the waves will reach warning level until around the 18th. The wind is also expected to increase, so please be careful of strong winds.




Although areas near Honshu will not be directly affected by Typhoon No. 4, waves will be high along with swells along the Pacific coast of western Japan and eastern Japan. In the Izu Islands, it is expected that there will be some places where waves will be over 4 meters high tomorrow, the 16th. Please be very careful.

Tomorrow, the 16th (Thursday), the weather will improve from the west, with sunny spells spreading across the country and temperatures rising

2026/04/15 13:02

Today, the 15th (Wednesday), due to the influence of a front and humid air, it rained over a wide area from western Japan to eastern Japan, and it was a cloudy day even in northern Japan.
However, the weather will gradually improve from the west as the front moves away to the east and the anticyclone gradually strengthens through the night.

The weather is expected to improve across the country tomorrow, the 16th (Thursday), and temperatures are expected to rise in sunny areas.



Tomorrow morning, light rain may remain in parts of Hokkaido and the coastal areas of Tohoku and Kanto, but
the clouds will fade as time passes, and many areas will see clear skies before noon. Particularly in eastern and western Japan, blue skies are expected to spread out and plenty of sunlight will reach the area.
The temperature will rise during the day tomorrow, reaching around 20c in many places from Kanto to Kyushu, and the daytime will be sunny and comfortable even with a light jacket. In the Tohoku region, the number of places with temperatures exceeding 15 degrees Celsius is increasing, and the cold is easing.



The temperature will continue to be higher than or similar to normal. Also, the temperature difference between morning and daytime is large, so you need to be careful when choosing clothing.

The heat has eased, and temperatures are typical of this time of year in various parts of the country. There is a large difference in temperature throughout the day in northern Japan.

2026/04/15 06:57

Yesterday, the 14th (Tuesday), the weather was sunny and warm from eastern Japan to the Kinki region, and it was the first summer day in Osaka in two weeks since March 31st. In addition, the temperature in central Tokyo reached 24.6c, which is unseasonably warm and just one step away from summer.



Today, the 15th (Wednesday), will be a day with little sunshine, with cloudy and rainy conditions from eastern to western Japan due to the influence of low pressure and fronts. The heat of the previous day will ease, and temperatures in various places will reach a maximum of around 20 degrees Celsius, which is typical for this time of year. It seems to be a relatively relaxing place.
On the other hand, sunlight is expected to reach northern Japan around mid-morning. During the day, temperatures are expected to reach mid-May temperatures in some places in the Tohoku region, and there will be a large difference in temperature between morning and evening and during the day. Please be careful not to get sick due to the temperature difference.

The predicted maximum temperature is Sapporo 15c, Sendai 17c, Tokyo 21c, Nagoya 19c, Kanazawa 18c, Osaka 19c, Kochi 20c, and Fukuoka 18c.

Today's weather on the 15th (Wednesday): Rain is expanding from the west. Wear rain gear when going out.

2026/04/15 06:33

Today, the 15th (Wednesday), the front is expected to extend from southern China to the east of Japan, and the low pressure above the front is expected to move eastward south of Honshu. As a result, there will be many places in western Japan with rain from the morning, and the weather will also go downhill in eastern Japan.



It will rain widely in western Japan from the morning. The area of rain will move eastward during the day, and it is likely to stop in some parts of Kyushu in the afternoon. Please be careful not to leave your rain gear behind when you return. The sky is likely to rain throughout the day in Chugoku, Shikoku, and Kinki.

The weather seems to be going downhill in eastern Japan. Rain clouds are expected to start forming in the Tokai region from the afternoon, and in the Kanto region from the evening. Don't forget to prepare rain gear even if it's not raining when you go out.

Although there will be some sunshine in the morning in northern Japan, the sky will gradually become cloudy. There are places on the Pacific coast and southern Tohoku where it starts to rain at night, so if you're returning home late, it's a good idea to bring a folding umbrella.

Tomorrow, the 15th (Wednesday), it will rain over a wide area, with rain clouds moving from Kyushu to eastern Japan.

2026/04/14 12:22

Tomorrow, the 15th (Wednesday), the low pressure system will remain in the south of Japan and will form on the front and move east. As a result, rain is expected to fall over a wide area from Kyushu to eastern Japan. A characteristic of this rain is that warm, humid air flows toward the front, making it easy for rain clouds to develop. Particularly on the Pacific side near the front, the rain may become stronger, resulting in locally concentrated rainfall.



It will rain mainly in Kyushu in the morning, and the rain area will spread to the east as time passes. Rain will become serious in Chugoku and Shikoku around noon, and in the Kinki, Tokai, and Kanto regions from evening to night. As humid air flows into the Kanto region from the south, rain clouds are likely to form, especially in coastal areas, and may temporarily intensify at night.

Temperatures are unlikely to rise due to the rain, and it looks like it will be a chilly day in western Japan. On the other hand, in eastern Japan, the humidity is high and you may feel hot and humid even when it rains. In some areas, the rain can be heavy during the time you return home, so it is essential to prepare rain gear when going out.



The weather will start to improve in many areas the day after tomorrow. The weather is expected to continue to change periodically, so please check the latest weather information.

[Latest typhoon information] Large and ferocious typhoon No. 4 is heading north through the Mariana Islands, and the Ogasawara Islands are at risk of warning-level high waves

2026/04/14 07:28

As of 6 a.m. today, Tuesday the 14th, a large and ferocious typhoon No. 4 is moving north-northwest near the Mariana Islands at a speed of 15 km/h.

#Typhoon No. 4 14th (Tuesday) 6:00 am
===================
Size Large
Force Ferocious
Center location Mariana Islands
Traveling speed North-northwest 15km/h
Central pressure 905hPa
Maximum wind speed: 60m/s (near the center)
Maximum instantaneous wind speed: 85m/s
===================

Typhoon No. 4 will continue to move north, and the current forecast is that it will move northeast to the east of the Ogasawara Islands around 3:00 on the 18th.
Typhoon No. 4 is expected to gradually lose strength as it moves northward, but as of the 18th, it is expected to remain strong, with a central pressure near the center of 970 hPa, a maximum instantaneous wind speed of 35 m/s near the center, and a maximum instantaneous wind speed of 50 m/s.



Waves in the Ogasawara Islands have gradually become higher since around the 16th, and there is a risk of warning-level high waves from around the 17th to the 18th this weekend. Please pay attention to the latest typhoon information that will be updated in the future.
In addition, although it is expected that Typhoon No. 4 will have little direct impact on areas around Honshu, it is expected that waves will be high in some places in the Izu Islands and on the Pacific side of eastern Japan. Please be very careful.

The weather for today, the 14th (Tuesday): Weather in western Japan is downhill and gradually raining; eastern and northern Japan are mostly sunny, with warmth similar to that of May.

2026/04/14 06:52

Today, the 14th (Tuesday), northern and eastern Japan will be mostly covered by high pressure. Meanwhile, the front is expected to remain stationary south of Honshu, and a new low pressure system is expected to form near the East China Sea above the front. As a result, the weather will be downhill in western Japan.



There are places in Kyushu where it will rain from the morning, and the rain will gradually spread to the Chugoku and Shikoku regions in the afternoon. It's a good idea to take an umbrella with you when you go out in the morning in case you get home late. Late at night, rain clouds are likely to spread over some parts of the Tokai and Kanto regions.

In the coastal areas of the Kanto region, clouds tend to spread, and there are likely to be places where thick fog forms in the morning. Please be careful of deteriorating outlook. There will be some sunny spells during the day, and it will be as warm as May.

Northern Japan will be covered by a belt-shaped high pressure system and will have sunny skies in many places. In Tohoku, the blooming of cherry blossoms was announced in Aomori yesterday, the 13th (Monday), and the blooming of cherry blossoms was also announced in Matsumae Town in southern Hokkaido on the 13th. The maximum daytime temperature is around 15c in many places, making it ideal for cherry blossom viewing in places where the cherry blossoms are at their peak.