Today's weather forecast (Saturday, the 10th): The first day of the three-day weekend will be mostly sunny autumn weather, but be aware of thunderstorms in Kyushu and Okinawa.

2026/10/10 06:56

Today, Saturday the 10th-the first day of the three-day weekend-most of Honshu will be under the gentle influence of a high-pressure system, bringing widespread, clear autumn weather. In contrast, clouds are likely to spread across northern Hokkaido, while Kyushu and Okinawa can expect conditions prone to rain.



In Hokkaido, clouds will tend to spread over the northern part of the region, with some areas likely seeing rain.

Regions stretching from Tohoku through Chugoku and Shikoku will be gently covered by a high-pressure system, resulting in clear autumn weather. It promises to be an ideal day for leisure activities or hanging laundry outside.
However, due to the influence of Typhoons No. 28 and No. 29, high waves accompanied by swells are expected along the Pacific coast. Please exercise caution if engaging in marine leisure activities.

Kyushu and Okinawa will be under the influence of a pressure trough, leading to weather conditions prone to rain. You will need rain gear if you go out.
Kagoshima Prefecture, in particular, will see an influx of warm, moist air from the periphery of the high-pressure system, making atmospheric conditions unstable. Please be alert for lightning, sudden strong gusts (such as those associated with tornadoes), and sudden heavy downpours.
If you notice signs of approaching developed cumulonimbus clouds-such as hearing thunder or seeing dark clouds drawing near-please prioritize your safety by moving into a sturdy building.

Regarding temperatures, regions with clear skies will experience a significant difference between morning/evening lows and daytime highs. Please adjust your clothing accordingly to avoid falling ill. While individual sensitivity to heat and cold varies, a general guideline is: short sleeves for 25C or higher; long-sleeved shirts when it drops below 25C; and an outer layer, such as a cardigan, when it falls below 20C. It is a good idea to bring an outer layer when you go out so you can adjust your clothing as needed.
Please use this guide on the relationship between temperature and appropriate attire as a reference.

Twin Typhoons: High Waves Expected Along the Pacific Coast Despite Distance

2026/10/09 21:14

As of today, Friday the 9th, two typhoons-No. 28 and No. 29-are located near Minamitorishima and are moving northwest. Consequently, high waves are already being observed in some areas along the Pacific coast from eastern to western Japan.
As the typhoons continue to move in a westerly to northerly direction, waves are expected to gradually rise along the Pacific coast of northern Japan starting around Sunday the 11th.
Caution is advised for marine leisure activities such as fishing and surfing during the three-day weekend. Please be sure to check the latest information.

# Typhoon No. 28 (Noru) - Friday the 9th, 6:00 PM
------------------------------------
Center location: Near Minamitorishima
Movement: West-northwest at 20 km/h
Central pressure: 994 hPa
Max. wind speed: 23 m/s (near center)
Max. instantaneous wind speed: 35 m/s
------------------------------------



Typhoon No. 28 (Noru) is moving northwest; it is forecast to shift its course toward the north tomorrow, Saturday the 10th, and transform into an extratropical cyclone east of Japan on Sunday the 11th.

# Typhoon No. 29 (Koguma) - Friday the 9th, 6:00 PM
------------------------------------
Intensity: Strong
Center Location: Near Minami-Torishima
Movement: Northwest at 25 km/h
Central Pressure: 970 hPa
Max. Wind Speed: 40 m/s (near center)
Max. Gust Speed: 55 m/s
------------------------------------



Strong Typhoon No. 29 (Koguma) is intensifying; it is expected to reach "very strong" status while moving northwest tomorrow, Saturday the 10th, and may approach the Ogasawara Islands around Monday the 12th (a public holiday). Afterward, it is likely to move in a northerly direction off the east coast of Japan.
Caution regarding strong winds and high waves is advised for the Ogasawara Islands, particularly around Monday the 12th.

Currently, both typhoons are expected to pass well away from the main island of Honshu; however, high waves accompanied by swells are forecast for the Pacific coastlines of Northern and Western Japan. Particular caution is required during the three-day weekend starting tomorrow, Saturday the 10th. Even if the weather is calm, high waves are expected along the coast; please check the latest information and avoid approaching the shoreline unnecessarily.

Weekend Weather: A Stretch of Clear Autumn Skies — But Beware of High Waves (Explanation by Meteorologist Junko Miyake)

2026/10/09 18:34

Many people will be enjoying a three-day weekend starting tomorrow.
Since Sports Day falls within the holiday period, many schools and communities are expected to hold athletic events.
Let's take a closer look at the weather during the long weekend.

Weather Map Overview
The forecast charts show that Honshu will be covered by a broad, gentle high-pressure system throughout the three days.
The center of the high is positioned slightly to the north, but dry air spreads over much of Japan, bringing clear autumn skies and crisp, pleasant conditions.
It looks like ideal weather for outings, sightseeing, and sports events.

However, moist air flowing around the edge of the high will make clouds more likely over Kyushu, Okinawa, and Hokkaido, with some areas seeing localized showers.

Weather During the Three-Day Weekend
Across Honshu, many places will see nothing but sunshine.
Daytime temperatures will rise above 25C in several areas, giving a touch of late-summer warmth.
Morning and evening temperatures, however, will drop to around 15C, creating a large difference between day and night.
Be mindful of your clothing to avoid catching a chill.

In Kyushu, clouds will be more widespread, and Hokkaido is also expected to have more cloud cover through the weekend.
On Saturday, both Kyushu and Hokkaido may see some rain.
Okinawa could experience rain and thunderstorms from Saturday through Sunday, with the risk of lightning and sudden gusts.

Typhoons Near Japan
Two typhoons are currently located over the southeastern waters of Japan-Typhoon No. 28 and Typhoon No. 29.
Typhoon 28 is expected to transition into an extratropical cyclone by tomorrow.
Typhoon 29 will continue moving north while maintaining strong intensity.

Neither typhoon will approach the Japanese mainland, but they will send large swells toward the Pacific side.
Even under sunny skies, coastal leisure activities require caution due to high waves.

Weekly Outlook
During the holiday period, many areas will continue to see sunny weather.
Some places may still reach close to 30C during the day, so be mindful of the heat.

After the long weekend, a low-pressure system and a front will pass over Japan.
Rain is expected to begin in Hokkaido and Kyushu on Tuesday the 13th, spreading widely across the country on Wednesday the 14th.

This rainfall will mark another step toward deeper autumn.
Later next week, temperatures in northern Japan will drop below 10C, and autumn foliage is likely to begin not only in the mountains but also in urban areas.

Weekend Weather: A Stretch of Clear Autumn Skies — But Beware of High Waves (Explanation by Meteorologist Junko Miyake)

2026/10/09 14:09

Many people will be enjoying a three-day weekend starting tomorrow.
Since Sports Day falls within the holiday period, many schools and communities are expected to hold athletic events.
Let's take a closer look at the weather during the long weekend.

Weather Map Overview
The forecast charts show that Honshu will be covered by a broad, gentle high-pressure system throughout the three days.
The center of the high is positioned slightly to the north, but dry air spreads over much of Japan, bringing clear autumn skies and crisp, pleasant conditions.
It looks like ideal weather for outings, sightseeing, and sports events.

However, moist air flowing around the edge of the high will make clouds more likely over Kyushu, Okinawa, and Hokkaido, with some areas seeing localized showers.

Weather During the Three-Day Weekend
Across Honshu, many places will see nothing but sunshine.
Daytime temperatures will rise above 25C in several areas, giving a touch of late-summer warmth.
Morning and evening temperatures, however, will drop to around 15C, creating a large difference between day and night.
Be mindful of your clothing to avoid catching a chill.

In Kyushu, clouds will be more widespread, and Hokkaido is also expected to have more cloud cover through the weekend.
On Saturday, both Kyushu and Hokkaido may see some rain.
Okinawa could experience rain and thunderstorms from Saturday through Sunday, with the risk of lightning and sudden gusts.

Typhoons Near Japan
Two typhoons are currently located over the southeastern waters of Japan-Typhoon No. 28 and Typhoon No. 29.
Typhoon 28 is expected to transition into an extratropical cyclone by tomorrow.
Typhoon 29 will continue moving north while maintaining strong intensity.

Neither typhoon will approach the Japanese mainland, but they will send large swells toward the Pacific side.
Even under sunny skies, coastal leisure activities require caution due to high waves.

Weekly Outlook
During the holiday period, many areas will continue to see sunny weather.
Some places may still reach close to 30C during the day, so be mindful of the heat.

After the long weekend, a low-pressure system and a front will pass over Japan.
Rain is expected to begin in Hokkaido and Kyushu on Tuesday the 13th, spreading widely across the country on Wednesday the 14th.

This rainfall will mark another step toward deeper autumn.
Later next week, temperatures in northern Japan will drop below 10C, and autumn foliage is likely to begin not only in the mountains but also in urban areas.

[Twin Typhoons] Typhoon No. 29 forecast to approach the Ogasawara Islands around the 12th; caution advised regarding high waves along the Pacific coast.

2026/10/09 12:32

As of 11:00 a.m. today, Friday the 8th, two typhoons?Typhoon No. 28 and Typhoon No. 29?are present in the waters near Japan. Both are currently moving through the area near Minamitorishima.

#Typhoon No. 28 (Noru) ? As of 11:00 a.m. on the 9th (Fri)
=====================================
Center location: Near Minamitorishima
Movement speed: Northwest at 25 km/h
Central pressure: 992 hPa
Max. wind speed: 25 m/s (near center)
Max. instantaneous wind speed: 35 m/s
=====================================



Typhoon No. 28 is unlikely to approach the main island of Honshu; it is forecast to transform into an extratropical cyclone over the waters east of Japan by 9:00 a.m. on the 11th. Consequently, there will likely be no direct impact on Honshu.

Meanwhile, another typhoon?Typhoon No. 29, classified as "strong"?is located near Minamitorishima and is moving in a northwesterly direction.

#Typhoon No. 29 (Koguma) ? As of 11:00 AM on the 9th (Fri)
=====================================
Intensity: Strong
Location: Waters near Minamitorishima
Movement: West-northwest at 20 km/h
Central Pressure: 970 hPa
Max. Wind Speed: 40 m/s (near center)
Max. Gust Speed: 55 m/s
=====================================



Typhoon No. 29 is expected to continue intensifying as it moves westward, reaching its closest point to the Ogasawara Islands around the 12th with "very strong" intensity. Although the Ogasawara Islands lie outside the red-outlined "storm warning zone" (an area where average wind speeds of 25 m/s or higher could occur if the typhoon's center tracks within the forecast circle), residents should exercise caution regarding high waves accompanied by swells and strong winds.
Furthermore, as Typhoon No. 29 is forecast to gradually shift toward the northeast after the 12th, the likelihood of it approaching the main Japanese islands (Honshu) is considered low.



However, along the Pacific coast from northern to western Japan, swells generated by two typhoons are expected to persist, resulting in continued high waves. While the weather is generally expected to remain stable across most areas during the upcoming three-day weekend, those planning marine leisure activities should exercise great caution regarding high waves.

Weather for Tomorrow (Thursday the 8th) and the Day After (Friday the 9th): Autumn Sunshine Across Honshu on the First Day of the Three-Day Weekend

2026/10/08 19:34

Today, Thursday the 8th, a high-pressure system covered a wide area around Japan, resulting in sunny and pleasant weather nationwide. Due to radiative cooling, many locations?stretching from the southern Tohoku region to southern Kyushu?experienced their coldest temperatures of the season so far; Nobeyama in Nagano Prefecture recorded a low of -0.6C.



Tomorrow, Friday the 9th, the high-pressure system will shift eastward while continuing to cover much of the region, bringing sunny skies to many parts of Honshu. There will be a significant temperature difference between day and night, so please adjust your clothing accordingly. Meanwhile, clouds are likely to spread across Hokkaido and Kyushu. In southern Kyushu and the Nansei Islands, the atmosphere may become unstable due to the influence of warm, moist air and cold air aloft. Consequently, caution is advised regarding lightning strikes and sudden heavy rain from tomorrow (Friday) through the day after (Saturday).





Honshu is expected to remain under the influence of the high-pressure system on Saturday the 10th as well, making it a great day for outings at the start of the three-day weekend. However, due to easterly winds circulating around the high-pressure system and the influence of Typhoon No. 28, caution regarding high waves is necessary along the Pacific coast?stretching from eastern to western Japan?and around the Nansei Islands.

Latest One-Month Forecast: Nationwide trend of higher-than-normal temperatures; seasonal progression expected to be slow.

2026/10/08 17:01

On Thursday the 8th, the Japan Meteorological Agency released its latest one-month forecast, outlining expected weather conditions for the coming month.



Projections for average sea-level pressure over the month indicate a trough of low pressure near Northern Japan, suggesting periods where the region will be susceptible to the influence of low-pressure systems and fronts. Conversely, Eastern and Western Japan are expected to be frequently covered by high-pressure systems, particularly during the early part of the period.
Temperatures at an altitude of approximately 1,500 meters are expected to remain above average, with the entire country likely to be enveloped in warm air.

Looking ahead, Western and Eastern Japan will see many days under the influence of high-pressure systems, with sunny weather prevailing from the 10th through around the 16th?the start of the forecast period. Subsequently, the weather is expected to shift cyclically through around the 6th of the following month, with precipitation and sunshine duration likely remaining close to seasonal averages.
Northern Japan is expected to be frequently affected by low-pressure systems and fronts, particularly during the early part of the period. Consequently, precipitation levels there are projected to be higher than in Eastern and Western Japan.





Average temperatures for the month are forecast to be above normal across the country. The Japan Meteorological Agency has issued an "Early Warning Information on High Temperatures," forecasting that average temperatures nationwide will be "significantly higher" than normal for this time of year, particularly from around the 14th to the 22nd. Please take appropriate precautions, such as managing crops.
Temperatures are expected to remain above average nationwide even after this period. The progression of the seasons is slow, and the pace at which autumn foliage changes color is likely to be delayed compared to a typical year.
However, on clear, calm nights, temperatures can drop sharply by morning due to radiative cooling, leading to significant temperature differences between day and night. Please be careful to look after your health to avoid falling ill due to these sudden temperature fluctuations.

What Is a Frost Advisory? Radiational Cooling, Frost, and Crop Management

2026/10/08 14:53

Since the start of October, frost advisories have been issued with increasing frequency, particularly in northern Japan.
Temperatures are expected to drop again tomorrow morning (Friday, the 9th), and frost advisories have been issued for some areas.



So, when exactly is a "frost advisory" issued, and what should one be on the lookout for? Here is an explanation of frost advisories.

# What is a frost advisory?
A frost advisory is issued by the Japan Meteorological Agency when there is a predicted risk of damage caused by frost. Specifically, it is issued during spring and autumn when falling temperatures and resulting frost threaten to damage crops or fruit.
In short, a frost advisory serves as a warning to take precautions regarding crop management.

Frost advisories are issued during the spring and autumn seasons. They are not issued during periods like mid-winter, when crops vulnerable to frost are unlikely to be growing. While caution is required in both spring and autumn, the terms used for frost differ depending on the season:

*Hayashimo* (Early frost) Frost that occurs unusually early in the autumn season.
*Ososhimo* / *Bansho* (Late frost) Frost that occurs unusually late, from spring through early summer.

In autumn, frost can damage crops that have not yet been harvested, while in spring, it can damage crops that have sprouted and begun to grow.


# What is frost?
Frost occurs when the temperature of an object drops to 0C or below, causing water vapor in the air to undergo sublimation (transitioning directly from gas to solid) and adhere to the object as crystals.

# Weather conditions conducive to frost
Frost is likely to form on days characterized by high atmospheric pressure, clear skies (few clouds), and light winds.
On such days, radiative cooling is highly effective from night through dawn, causing a significant drop in the temperature of objects such as the ground surface and plants.
Conversely, on cloudy days, the clouds act like a lid over the ground, making it difficult for heat to escape. Additionally, because clouds radiate heat back down, the ground surface temperature does not drop as much as it does on clear days.

*Radiative cooling is the phenomenon where an object cools down by emitting heat. In this context, it refers to the process where the ground surface emits heat, cooling the air in the immediate vicinity.

The air temperatures observed and forecast by the Japan Meteorological Agency are based on measurements taken at a height of approximately 1.5 meters above the ground. However, near the ground surface, temperatures drop lower than this at night due to radiative cooling. Consequently, even if the forecast minimum temperature is 3-4C, temperatures near the ground or on plant surfaces can fall below freezing; this causes atmospheric water vapor to sublimate and form ice crystals that adhere to plants and other objects.

# Frost Damage and Countermeasures
Frost damage refers to harm caused to crops when frost settles on them. When frost forms on crops, plant cells can rupture, potentially leading to withered leaves or reduced fruit quality.

Here are some measures to take when a frost advisory is issued:

Cover crops with tunnels or protective sheeting.
This helps retain heat near the ground surface and prevents temperatures from dropping excessively.

Circulate air over the crops.
Moving the air mixes the layer near the ground with the air above, preventing the temperature near the ground from dropping too low.

Use heating equipment.
Using agricultural heaters to maintain the ambient temperature helps prevent the temperature near the ground from falling excessively.

# What else should you keep in mind?
While frost advisories are issued primarily for crop management, they also indicate that temperatures will drop significantly during the night or early morning.
You may notice the effects around your home as well-for instance, finding your car windshield completely white with frost when you head out in the morning. Additionally, since large temperature fluctuations between day and night are expected, this information can help you decide how to dress. It is worth paying attention to these advisories.

Typhoon No. 26 Moves South of Japan; Tokyo Sets Record for Longest Consecutive Days of Precipitation (Weather Summary: September 27 – October 3, 2026)

2026/10/08 14:30

Tokyo experienced rain on every single day of September this year?a first since record-keeping began in 1886. A streak of 37 consecutive days with precipitation (from August 27 to October 2) marked the longest such period on record, and the total monthly rainfall for September reached 696.5 mm, setting a new record high for the month.

The following is a summary of the weather conditions for the period from September 27 to October 3, 2026.

#Weather Summary (September 27 ? October 3)
Average temperatures were higher than normal in Okinawa/Amami and southern Kyushu, regions susceptible to warm air associated with Typhoon No. 26; temperatures were also above normal in parts of the Pacific side of Hokkaido due to the influence of a low-pressure system. In other regions, prolonged periods of rain caused by the autumn rain front and Typhoon No. 26 resulted in temperatures that were generally close to normal.

Precipitation levels tended to exceed normal values, particularly in western Japan, due to the influence of the autumn rain front and Typhoon No. 26; the Izu Islands, in the path of Typhoon No. 26, saw rainfall significantly above normal. In Hokkaido, the passage of low-pressure systems and fronts, combined with strong cold air aloft, led to above-normal precipitation in areas such as Sapporo and Asahikawa.

Sunshine duration was generally close to normal across the Pacific side of Hokkaido, the Sea of ??Japan side from Tohoku through eastern Japan, and western Japan, while Okinawa and Amami saw significantly above-normal sunshine. Conversely, the Sea of ??Japan side of Hokkaido experienced below-normal sunshine due to low-pressure systems and cold air aloft, and many areas on the Pacific side of Tohoku, as well as in Kanto and Tokai, also saw below-normal sunshine due to the influence of the autumn rain front, Typhoon No. 26, and northeasterly airflows.

[Weather Conditions During This Period]
#Characteristics of Pressure Patterns
On the 27th, a low-pressure system moved eastward from North China, passing over the Korean Peninsula; on the 28th, it intensified while accompanied by a front and moved across the Sea of ??Japan. Continuing to intensify, the low reached the Sea of ??Okhotsk on the 29th and moved away to the east of the Kuril Islands from the 30th onwards. Throughout this period, the autumn rain front remained stationary near the southern coast of Honshu from around the 27th to the 30th. Meanwhile, Typhoon No. 26 moved northeastward from waters south of Okinawa Island to waters south of Honshu; it gradually approached the autumn rain front, passed near the Izu Islands around the 1st, and transformed into an extratropical cyclone on the 2nd. On the 30th, a low-pressure system accompanied by a front intensified while moving near Primorsky Krai; it moved northeastward near Sakhalin on the 1st and reached the Sea of ??Okhotsk around the 2nd. A high-pressure system extended from the continent, creating a temporary "west-high, east-low" pressure pattern near Honshu on the 2nd, and by the 3rd, a wide area was covered by high pressure. Near the Marshall Islands, a new typhoon?Typhoon No. 27?formed around 3:00 AM on the 1st; by the 3rd, it had intensified into a large, strong typhoon and was moving near the Mariana Islands.

#Precipitation
On the 27th, rain clouds developed due to the influence of warm, moist air flowing into the vicinity of the autumn rain front from Typhoon No. 27. In Kyushu, "very heavy rain" (defined as 50mm/h or more) was observed in Omuta City, Fukuoka Prefecture, with an intensity of 71.0 mm/h. On the 28th, heavy rain continued in western Japan near the autumn rain front, while Hokkaido experienced rain due to a low-pressure system and a front moving across the Sea of ??Japan; Morino in Shiraoi Town recorded "very heavy rain" at a rate of 62.0 mm/h. On the 29th, the autumn rain front shifted slightly southward, but rain persisted across a wide area from Tohoku to Kyushu; Takefu in Echizen City, Fukui Prefecture, recorded "heavy rain" at 31.0 mm/h. On the 30th, the approach of Typhoon No. 26 brought heavy rain, particularly to the Izu Islands, with Hachijojima recording "heavy rain" at 39.0 mm/h. On the 1st, the passage of a front brought rain to eastern Hokkaido and northern Tohoku, with Imakane Town in Hokkaido recording "strong rain" at 23.5 mm/h. On the 2nd, strong cold air aloft caused snowfall in the high-altitude mountains of Hokkaido, with the season's first snowcap observed on Mount Asahi (Daisetsuzan). In Tokyo, rain fell on every single day of September?a first since record-keeping began?and the streak of consecutive days with precipitation lasted 37 days (from August 27 to October 2), marking the longest such period on record.

#Temperatures
On the 27th, temperatures rose in southern Kyushu due to warm air brought by Typhoon No. 26; Kimotsuki-Maeda in Kagoshima Prefecture recorded a "midsummer day" (high of 30C or above) at 32.8C, and temperatures remained high at the same location the following day (the 28th), climbing to 34.0C. On the 29th, temperature rises were sluggish in areas from the Chugoku region eastward where rain continued north of the autumn rain front; the high was 22.8C in Nagoya and 21.8C in Tokyo, levels typical of mid-October. On the 30th, the Kanto region was affected by a northeasterly airflow, resulting in temperatures typical of late October, such as 20.8C in Tokyo. Meanwhile, in western Japan, "midsummer day" temperatures were recorded in areas where the sun broke through. On the 1st, temperatures rose sharply in parts of the Kanto region that saw sunshine, driven by factors such as the influx of warm air associated with a typhoon. Kiryu City in Gunma Prefecture recorded a high of 33.1C, while Tokyo reached 30.0C?marking the first "midsummer day" (with a high of 30C or above) in nine days. Although many areas in Okinawa experienced midsummer-like heat on the 2nd and 3rd, the area around Honshu was covered by autumn-like air associated with a continental high-pressure system, resulting in fewer locations recording such high temperatures. In Hokkaido, cold air aloft combined with radiative cooling caused temperatures to drop; on the 3rd, Rikubetsu Town recorded a morning low of -0.1C, marking a "winter day" (with a low below 0C).

Thursday, the 8th: Calm, sunny weather across the Japanese archipelago; twin typhoons over the waters to the southeast.

2026/10/08 06:32

A high-pressure system from the continent is extending toward Japan.
While there is some cloud cover along the Sea of ??Japan coast in Hokkaido and the Tohoku region, most other areas are generally sunny.



No major weather deterioration is expected nationwide today.
It promises to be a crisp, sunny day?perfect for doing laundry.



Typhoons No. 28 and No. 29 are located far to the southeast of Japan and are moving northwest.
Typhoon No. 29 may approach the Ogasawara Islands around the 12th; please stay tuned for further updates.

Tomorrow, high pressure will continue to cover the region, bringing sunshine across the country, though the weather may deteriorate from southern Kyushu to Okinawa. During the upcoming three-day weekend, sunny skies are expected?especially in the Kanto region?making it ideal for outings, whereas Kyushu is likely to see more cloud cover.




"