United Kingdom
Score moved 3 → 4 (minimal impact → moderate impact). “UK forecasters call this the strongest El Niño in living memory — but Britain's own signal stays weak”
UK forecasters and the World Meteorological Organization have warned that the 2026–27 El Niño is set to be the most intense in over a century, with global drought and wildfire risks amplified across Asia and beyond. For the United Kingdom the canonical signal remains weak, and measured conditions for 9 July to 6 October 2026 show rainfall 54% below the 1991–2020 normal during the climatological dry season, alongside temperatures 1.6°C above average. The practical concern is therefore not the summer just past but the coming autumn and winter rains, on which winter cereal establishment and reservoir recharge depend.
120.4 mm vs 262.2 mm normal
Reanalysis shows rainfall 54% below the 1991–2020 normal for 9 July to 6 October 2026, though this window falls in the climatological dry season when totals are normally under 20 mm, so the meaningful signal is the outlook for the coming autumn and winter rains.
News source14.88°C mean vs 13.25°C normal
Mean temperatures for the same window ran 1.6°C above normal, consistent with the strong El Niño warming signal highlighted by UK forecasters and the WMO.
News sourceThe May–September growing season and the August–October harvest are expected to have proceeded broadly on schedule, with the main El Niño risk falling on autumn drilling and winter cereal establishment if the coming rains underperform.
NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (54.0°, -2.0°). Normals are 1991–2020. How this is computed
When it matters
Agricultural calendar for United Kingdom and where the El Niño impact window falls
Last 12 months vs normal
Observed monthly rainfall against the 1991–2020 climatology
Sector by sector
Harvest and the May–September growing season are expected to have run broadly on schedule, but a weak El Niño signal leaves autumn drilling and winter cereal establishment exposed if the coming rains underperform.
Reservoir and groundwater recharge depends on autumn and winter rainfall, and with the summer window already 54% below normal, water companies are likely to watch the coming rains closely.
Above-average temperatures raise the risk of heat stress for vulnerable groups, while drier conditions could worsen air quality and wildfire smoke exposure in southern England.
Warmer-than-normal conditions of 1.6°C above average are likely to trim winter heating demand while raising summer cooling loads and stressing grid capacity during heat episodes.
El Niño is expected to shift North Atlantic sea surface temperatures and plankton timing, potentially displacing mackerel and other migratory stocks around UK waters.
What happened last time
Past El Niño episodes and how United Kingdom responded. See the full ENSO timeline →
2023-24
Strong El Niño conditions coincided with a notably wet UK autumn and winter, underlining that the canonical UK rainfall response to El Niño is weak and often opposite in sign to the global signal.
unsourced background2015-16
A very strong El Niño that contributed to global temperature records and drought across Asia; the UK experienced a mild, stormy winter with significant flooding rather than rainfall deficit.
unsourced background1997-98
One of the strongest El Niño events on record, associated globally with severe drought and wildfire outbreaks; UK impacts were muted, with a mild, wet winter rather than pronounced drought.
unsourced backgroundLatest coverage
RSSHow does El Niño cause wildfires?
Worsening El Nino threatens Asia with severe drought, potentially threatening global food security
WMO: Prepare for El Niño
El Nino set to be most intense ‘for over a century’: UK forecasters
Strongest El Niño in living memory, but UK faces only a weak signal as dry season masks rainfall deficit
UK forecasters and the World Meteorological Organization have warned that the 2026–27 El Niño is set to be the most intense in over a century, with global drought and wildfire risks amplified across A
Nearby
Neighbouring countries