El Niño — the ongoing pattern of above-average sea surface temperatures across the equatorial Pacific — is forecast to reach historic strength between fall and winter 2026.
On 5ch, users expressed confusion that despite El Niño years typically bringing cooler summers, hot days continued in western Japan and Tokyo this year, with some pointing to jet stream meandering as the cause.
El Niño continues to develop, and is forecast to reach historic strength in the latter half of 2026
El Niño is a phenomenon in which sea surface temperatures remain higher than average across a band of the equatorial Pacific stretching from near the International Date Line to the coast of South America, and it causes extreme weather worldwide, including in Japan.
El Niño conditions have persisted since spring 2026, and are forecast to reach historic strength from fall into winter.
Source: severe-weather.eu / Original article here
West Japan was hot again this year too
East Japan's been relatively mild. I mean, it's still hitting 30°C+ every single day, so it's a heatwave compared to Showa-era summers, but still
Why was West Japan so brutally hot?
Even in Tokyo there were a lot of days without "tropical nights" this year (nights that stay above 25°C) — almost felt cold
Feels like the Earth got an update and is behaving differently from the old patterns
That's not El Niño's fault — it's the jet stream meandering that's causing it
Still better than the last couple years though. The point is, even a "cool summer" is this hot now
Why not just drain the gas out of the South Kanto gas field and fill it with water instead?
*This article is excerpted and summarized from the 5ch (Science News+) thread “[Weather] El Niño continues to develop, forecast to reach historic strength in the latter half of 2026.”
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