Latest 3-month forecast: Temperatures nationwide to be higher than average; the progression of the seasons will be slow.

2026/10/20 22:29

On Tuesday the 20th, the Japan Meteorological Agency (JMA) released its latest three-month weather forecast, outlining expected conditions for the coming three months.



An El Ni?o event?projected to be the strongest on record?is expected to persist through the winter. Sea surface temperatures are forecast to be higher than average across the eastern to central equatorial Pacific and the Indian Ocean, which will likely lead to an increase in the formation of cumulonimbus clouds in these regions. Conversely, fewer cumulonimbus clouds are expected to form near the Philippines.

As a result, the westerly jet stream in the upper atmosphere is likely to flow further south than usual?particularly over the Eurasian continent?and will also track slightly further south and remain relatively weak in the vicinity of Japan. While the Siberian High is expected to be near its typical seasonal strength, the Aleutian Low is projected to be weaker on its western side, leading to weaker seasonal winds around Japan.

Furthermore, due to the combined effects of global warming and the El Ni?o phenomenon, temperatures throughout the atmosphere?especially in the tropics?are expected to be higher than normal. Consequently, Japan is likely to see less impact from cold air masses.

With high-pressure systems tending to develop near the Philippines, warm, moist air from the south will likely flow toward Japan. This will make regions such as the Pacific-facing areas of Northern and Eastern Japan, Western Japan, and the Okinawa/Amami islands more susceptible to the influence of low-pressure systems.



The outlook for the next three months suggests that the entire country will experience minimal impact from cold air, with temperatures expected to remain higher than average. Over the next three months, temperatures in Western and Eastern Japan are expected to be higher than average, while in Northern Japan, they will likely be near or above average; the transition between seasons is expected to be gradual.



Due to the influence of low-pressure systems, precipitation is expected to be above average along the Pacific side of Japan, in Western Japan, and in the Okinawa-Amami region; along the Pacific side of Northern Japan, it is expected to be near or above average. Snowfall along the Sea of ??Japan side of Northern Japan is likely to be near or below average.
From November through December, the influence of low-pressure systems is expected to result in more cloudy or rainy days than usual across the Sea of ??Japan side of Western Japan and the Okinawa-Amami region. Along the Sea of ??Japan side of Northern Japan, there will likely be many days of clouds, rain, or snow, consistent with typical seasonal patterns.
This weather pattern is expected to continue into January, though the Pacific side of Northern Japan will likely see many sunny days, as is typical for that region.



*El Ni?o Phenomenon
A phenomenon in which sea surface temperatures in the equatorial Pacific remain higher than average. It influences global weather patterns and is statistically associated with a tendency for "warm winters and cool summers" in the vicinity of Japan.

Furthermore, in an "El Ni?o Monitoring Bulletin" released by the Japan Meteorological Agency on the 9th of this month, it was noted that sea surface temperatures in the El Ni?o monitoring region reached their highest recorded levels in September. The bulletin forecasts that these temperatures will remain above the baseline through the winter, eventually reaching their peak.

Typhoon 30 approaching; Okinawa region warned of violent winds, high waves, and storm surges

2026/10/20 18:18

As of 3:00 PM today, Tuesday the 20th, the large and very strong Typhoon No. 30 is moving west-northwest east of the Philippines. Satellite imagery shows a distinct eye near its center.



Typhoon No. 30 is expected to continue moving west-northwest while maintaining its intensity, and is projected to approach the Sakishima Islands?still as a very strong storm?between Friday the 23rd and Saturday the 24th. In the Okinawa region, winds will gradually begin to strengthen starting tomorrow, Wednesday the 21st; the Sakishima Islands, in particular, are expected to experience violent winds between Friday the 23rd and Saturday the 24th. Please take typhoon preparedness measures early, before the winds intensify.

Wind Forecast
Expected maximum wind speeds (maximum instantaneous wind speeds) for the 21st:
Okinawa Main Island region: 15 m/s (25 m/s)
Miyakojima region: 18 m/s (30 m/s)
Yaeyama region: 18 m/s (30 m/s)

Expected maximum wind speeds (maximum instantaneous wind speeds) for the 22nd:
Okinawa Main Island region: 17 m/s (30 m/s)
Miyakojima region: 23 m/s (35 m/s)
Yaeyama region: 23 m/s (35 m/s)
Daitojima region: 15 m/s (25 m/s)

Due to the typhoon, coastal waters will experience swells. Conditions are expected to become very rough?starting tomorrow, Wednesday the 21st, in the Sakishima Islands, and from Thursday the 22nd in the Okinawa Main Island and Daitojima regions. Please remain on alert for high waves accompanied by swells. Furthermore, depending on the typhoon's path, there is a risk of warning-level storm surges in the Sakishima Islands between Friday the 23rd and Saturday the 24th.



In the Okinawa region, the atmosphere will become unstable due to the influx of warm, moist air circulating around the typhoon. Please be cautious of lightning strikes and sudden, heavy rainfall tomorrow, Wednesday the 21st, and the day after, Thursday the 22nd. In particular, on Thursday the 22nd, please remain alert and take precautions against flooding in low-lying areas and rising water levels in rivers.

Weather for tomorrow, Tuesday the 20th: Northern Japan faces risk of heavy rain

2026/10/20 13:53

As of 11:00 a.m. today, Tuesday the 20th, a stationary front extends from off the coast of Sanriku to the waters west of Kyushu, bringing rain to areas stretching from the Tohoku region to the Hokuriku region.





This front is expected to remain stationary across eastern and western Japan throughout today, Tuesday the 20th. A low-pressure system is forecast to form along the front near Jeju Island tonight, which will likely affect the Japanese archipelago through tomorrow, Wednesday the 21st.

The low-pressure system is expected to intensify as it moves northeast across the Sea of ??Japan, passing over northern Japan and reaching the Sea of ??Okhotsk by the evening of tomorrow, Wednesday the 21st. Consequently, the area experiencing rain in northern Japan is expected to expand gradually from the Tohoku region toward Hokkaido. In the Hokuriku region and along the Sea of ??Japan side of the Tohoku region, caution is advised regarding heavy rain, strong winds, and lightning strikes throughout the day. In Hokkaido, please also be mindful of strong winds and lightning strikes from the afternoon onwards.

Western and eastern Japan will also see rain or cloudy skies, with a risk of thunderstorms and sudden, heavy downpours. In the Kanto region, while some areas may see sunny intervals from morning through evening, rain is expected in some places by nighttime.



Meanwhile, a very strong Typhoon No. 30 is moving west-northwest, east of the Philippines. It may approach the Nansei Islands, where winds are expected to strengthen starting tomorrow evening, Wednesday the 21st. Please exercise great caution regarding strong winds.

Be alert for heavy rain and thunderstorms across eastern and western Japan this afternoon, Tuesday the 20th.

2026/10/20 12:01

Today, Tuesday the 20th, a low-pressure system accompanied by a front is located east of the Kuril Islands and is moving eastward. A front extending from this system is reaching toward eastern and western Japan and is expected to remain nearly stationary.
As warm, moist air flows toward this front, atmospheric conditions across eastern and western Japan will become highly unstable.
Please be cautious of sudden heavy rainfall, lightning strikes, and violent gusts such as those associated with tornadoes.



Currently, rain is falling in parts of the Tohoku and Hokuriku regions, as well as along the Pacific coast from the Kanto to the Kinki regions-an area where moist air is flowing in from the sea around the periphery of a high-pressure system.

This morning, 58.5 mm of heavy rain was recorded in one hour-up until 3:08 AM-in Nishikawa, Kozagawa Town, Higashimuro District, Wakayama Prefecture.



Moving forward, rain in the Tohoku, Hokuriku, and Koshin regions is expected to continue in many areas until this evening. In the Kanto, Chugoku, and Shikoku regions, rain is likely to persist in some places until tonight.
Even in areas across eastern and western Japan where it is not currently raining, it is advisable to carry rain gear if you are heading out.

Furthermore, some areas may experience localized, intense rainfall accompanied by thunderstorms. Please remain alert for lightning strikes and violent gusts, such as those caused by tornadoes.

If you notice signs that a well-developed cumulonimbus cloud is approaching-such as the arrival of dark, black clouds or the sound of thunder-please take steps to ensure your safety, for example by moving indoors.

Weather for tomorrow, Tuesday the 20th: Caution advised for heavy rain in the Hokuriku region

2026/10/20 10:16

As of 11:00 a.m. today, Monday the 19th, a low-pressure system is located over the sea west of Hokkaido and is moving east-northeast. A front extending from this system is bringing rain, primarily to the Tohoku region. Meanwhile, in Shikoku, moist air is being channeled in by easterly winds circulating around a high-pressure system, resulting in heavy, localized rainfall accompanied by thunderstorms.





Although the low-pressure system will move away from Hokkaido by the evening of Monday the 19th, a front is expected to remain stalled across western and eastern Japan through tomorrow, Tuesday the 20th.
Tomorrow, while Hokkaido and the Southwestern Islands will see generally clear skies, a broad area?stretching from the southern part of the Tohoku region through western Japan?will experience rain. Near the front, some areas may see heavy downpours accompanied by thunderstorms.
Cloud cover will also spread across the northern part of the Tohoku region and the Kanto region, with rain in some places; in Kyushu, it will be mostly cloudy, with rain likely in some areas, particularly in the northern part. In western Japan, please be cautious of lightning strikes through tomorrow evening.



In the Hokuriku region in particular, atmospheric conditions will become highly unstable due to the influence of a weather front and the influx of warm, moist air. This is expected to bring heavy, thundery downpours to some areas. Should rain clouds stall or develop more intensely than currently forecast, there is a risk of heavy rainfall reaching a level that would trigger official weather warnings; please stay updated with the latest information. Furthermore, through late tomorrow night, there is a risk of lightning strikes, sudden gusts of wind, and hail?please take appropriate precautions to protect agricultural crops and facilities.

Rain to spread as a front moves south; widespread unstable weather expected on Tuesday the 20th.

2026/10/19 19:33

A low-pressure system accompanied by a front is located north of Hokkaido and is moving east-northeast.
Meanwhile, a high-pressure system is situated east of Japan and is moving toward the southeast.

Due to the front extending from the low-pressure system and moist air circulating around the edge of the high-pressure system, rain is falling in parts of the Tohoku, Hokuriku, Chugoku, and Shikoku regions.



From this evening, Monday the 19th, through tomorrow morning, Tuesday the 20th, the front is expected to gradually shift southward, causing the area affected by rain to expand across Eastern Japan, the Kinki region, the Chugoku region, and the Shikoku region.



Tomorrow, Tuesday the 20th, the front will remain nearly stationary near Honshu, leading to a high likelihood of rain across the Tohoku, Chugoku, and Shikoku regions.
Atmospheric conditions will become highly unstable; please be cautious of lightning, sudden gusts of wind, and intense, localized downpours.

The weather is expected to remain changeable over the coming week.
From Wednesday the 21st through Thursday the 22nd, the influence of the front near Honshu is expected to bring rain to a wide area.
In Okinawa, please also remain on alert for high waves caused by the approach of Typhoon No. 30.

" From the latter part of the week?Saturday the 24th onwards?there is a risk that a weather front will once again stall. Unsettled weather is likely to persist across Western Japan.
Please stay updated with the latest information.

[Typhoon Information] Large and very strong Typhoon No. 30 is expected to intensify into a "violent" typhoon as it moves south of Okinawa.

2026/10/19 13:10

As of 12:00 PM today, Monday the 19th, the large and very strong Typhoon No. 30 (Champa) is located east of the Philippines, moving westward at a speed of approximately 20 km/h. It carries a zone of violent winds; the central pressure is 945 hPa, with maximum sustained winds of 50 m/s near the center and peak gusts reaching 70 m/s. Winds of 25 m/s or greater are occurring within a 130 km radius of the center.

Typhoon No. 30 is expected to continue intensifying as it moves in a westerly direction, reaching "violent" (the highest intensity category) status by tomorrow, Tuesday the 20th. It is projected to remain at this "violent" intensity as it moves south of Okinawa by Thursday the 22nd. Thereafter, it may weaken slightly, but it is expected to approach the Okinawa region around Friday the 23rd while still classified as "very strong."

In the Okinawa region, caution and vigilance are required regarding high waves. Furthermore, in the Sakishima Islands, residents should be on alert for violent winds starting around Friday the 23rd. Please take precautionary measures against the typhoon well in advance.

# Typhoon No. 30 Monday, the 19th, 12:00 PM
-----------------------------------
Size: Large
Intensity: Very strong
Center location: East of the Philippines
Movement: West at 20 km/h
Central pressure: 945 hPa
Maximum sustained wind speed: 50 m/s (near the center)
Maximum instantaneous wind speed: 70 m/s
-----------------------------------

In the Okinawa region, coastal waters will see rising waves accompanied by swells.
In the Sakishima Islands, waves are expected to build starting tomorrow, Tuesday the 20th, with rough sea conditions (high waves) anticipated from Wednesday the 21st through Saturday the 24th. Please remain on alert for high waves accompanied by swells.
In the Okinawa Main Island and Daito Island regions, depending on the typhoon's path and other factors, there is also a risk of rough sea conditions from Wednesday the 21st through Saturday the 24th. Please exercise great caution regarding high waves accompanied by swells.

In the Sakishima Islands, the pressure gradient between a high-pressure system over the continent and the typhoon will increase.
Strong winds are expected to begin on Wednesday the 21st, with violent, stormy winds likely from Friday the 23rd through Saturday the 24th. Please remain on alert for these violent winds. You need to take precautions against the typhoon early, before the winds pick up. [Wave Forecast - Okinawa Region]
Expected wave heights for the 19th:
Daito Islands Region: 3m, with swells

Expected wave heights for the 20th:
Daito Islands Region: 4m, with swells
Okinawa Main Island Region: 3m, with swells
Miyako Islands Region: 3m, with swells
Yaeyama Islands Region: 2.5m, with swells

Expected wave heights for the 21st:
Daito Islands Region: 5m, with swells
Okinawa Main Island Region: 5m, with swells
Miyako Islands Region: 6m, with swells
Yaeyama Islands Region: 5m, with swells

[Wind Forecast - Okinawa Region]
Expected wind direction and maximum wind speed (peak gust speed) for the 21st:
Miyako Islands Region: Northeast, 17 m/s (30 m/s)
Yaeyama Islands Region: North, 18 m/s (30 m/s)


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Additionally, in the Sakishima Islands, depending on the typhoon's path and other factors, there is a risk of a storm surge reaching a level that would warrant a warning around Friday the 23rd. Please exercise extreme caution regarding potential flooding or inundation caused by storm surges in low-lying areas near coasts and river mouths.

Please stay updated with any disaster-prevention weather information issued in the coming days.

Weather for tomorrow, Tuesday the 20th: Caution advised for heavy rain in the Hokuriku region

2026/10/19 12:06

As of 11:00 a.m. today, Monday the 19th, a low-pressure system is located over the sea west of Hokkaido and is moving east-northeast. A front extending from this system is bringing rain, primarily to the Tohoku region. Meanwhile, in Shikoku, moist air is being channeled in by easterly winds circulating around a high-pressure system, resulting in heavy, localized rainfall accompanied by thunderstorms.





Although the low-pressure system will move away from Hokkaido by the evening of Monday the 19th, a front is expected to remain stalled across western and eastern Japan through tomorrow, Tuesday the 20th.
Tomorrow, while Hokkaido and the Southwestern Islands will see generally clear skies, a broad area?stretching from the southern part of the Tohoku region through western Japan?will experience rain. Near the front, some areas may see heavy downpours accompanied by thunderstorms.
Cloud cover will also spread across the northern part of the Tohoku region and the Kanto region, with rain in some places; in Kyushu, it will be mostly cloudy, with rain likely in some areas, particularly in the northern part. In western Japan, please be cautious of lightning strikes through tomorrow evening.



In the Hokuriku region in particular, atmospheric conditions will become highly unstable due to the influence of a weather front and the influx of warm, moist air. This is expected to bring heavy, thundery downpours to some areas. Should rain clouds stall or develop more intensely than currently forecast, there is a risk of heavy rainfall reaching a level that would trigger official weather warnings; please stay updated with the latest information. Furthermore, through late tomorrow night, there is a risk of lightning strikes, sudden gusts of wind, and hail?please take appropriate precautions to protect agricultural crops and facilities.

Large and very strong Typhoon 30 (Champa): Okinawa should brace for high waves and strong winds in the latter half of the week.

2026/10/19 07:05

As of 6:00 a.m. today, Monday the 19th, Typhoon No. 30 (Champa) has become a "large" typhoon. It is currently moving west-northwest at a speed of approximately 15 km/h through the Mariana Islands, while maintaining a "very strong" intensity.

? Typhoon No. 30 ? Monday, the 19th, 6:00 a.m.
==================
Center Location: Mariana Islands
Size: Large
Intensity: Very Strong
Movement: West-northwest, 15 km/h
Central Pressure: 960 hPa
Maximum Sustained Wind Speed: 45 m/s (near the center)
Maximum Gust Speed: 65 m/s
==================



The typhoon is expected to continue developing as it moves northwest, passing east of the Philippines. By the latter half of the week, it is projected to move south of Okinawa while maintaining its "very strong" intensity, and is expected to reach the vicinity of Taiwan around Saturday, the 24th.

In the Sakishima Islands, sea conditions are expected to become very rough between Thursday, the 22nd, and Friday, the 23rd. Depending on the typhoon's exact path, the Yaeyama region could experience severe weather and potentially dangerous storm surges that may warrant the issuance of weather warnings. In the Okinawa main island region and the Daito Islands region, there is a risk of rough seas from the day after tomorrow, Wednesday the 21st, through around Friday the 23rd, depending on the typhoon's path and other factors.
Furthermore, the Sakishima Islands, in particular, may enter the typhoon's storm zone around Friday the 23rd, which could lead to impacts from strong winds.
Please stay updated on the latest information regarding the typhoon and take early precautions.

Weather for today, Monday the 19th: Umbrellas will be needed in many areas; some sunny intervals expected in the Kanto region.

2026/10/19 06:18

Today, Monday the 19th?the start of the new week?a low-pressure system accompanied by a front is expected to move from the Sea of ??Japan toward Hokkaido. As this front passes across Japan, many areas will likely need an umbrella throughout the day.



In Hokkaido and the northern part of the Tohoku region, rain will begin in the morning, with the potential for localized heavy downpours and thunderstorms. Caution is also advised regarding strong winds in coastal areas. However, by the afternoon, the rain clouds will move eastward, and some areas may see the return of sunshine.

Across the southern part of the Tohoku region, as well as the Sea of ??Japan side of eastern and western Japan, the weather is set to deteriorate.
Rain will gradually begin in many places around midday, with the possibility of localized heavy downpours and thunderstorms.
The Tokai region and the Pacific side of western Japan are also likely to experience frequent rain; please be sure to carry rain gear if you head out.

Meanwhile, in the Kanto region, while clouds will spread, there may still be some sunny intervals?particularly in the southern areas?during the morning.
As there is a chance of scattered showers in the evening, those returning home late may want to keep a folding umbrella handy.

Temperatures will generally be around or above average for this time of year. It may feel somewhat muggy, especially across eastern and western Japan, while northern Japan will likely experience more comfortable conditions.