Met Office Warns of 'Super El Niño' as UK Temperatures Set to Rise Again
Following one of the warmest starts to April ever recorded, temperatures across the United Kingdom are poised to climb once more this week. Last Wednesday, Kew Gardens in south-west London recorded a scorching 26.6C, marking the hottest day of 2026 so far. After a cooler weekend, forecasters predict a gradual warming trend, with London potentially reaching 18C by Friday and Manchester hitting 16C. Springtime conditions are expected to persist into the weekend, featuring highs of 17C on Saturday and 16C on Sunday.
What is El Niño and Its Global Impact?
The term El Niño refers to the periodic warming of sea surface temperatures in the central-east equatorial Pacific Ocean, typically occurring every few years. When these temperatures exceed the long-term average by 0.5C, an El Niño event is officially declared. This phenomenon is most strongly felt in the tropical eastern Pacific, where it brings warmer-than-average weather conditions.
Recent effects have been observed globally, including unseasonal heat in the United States during March, where average temperatures soared 5.19C above the 20th-century norm. However, the repercussions extend far beyond, increasing the risk of severe droughts in regions such as India, parts of the western Pacific, north-east Australia, and the Amazon. Additionally, El Niño often leads to reduced activity in Atlantic tropical cyclones, altering storm patterns.
Potential for a 'Super-Strength' Event
Forecasters are now suggesting that a brewing El Niño could escalate to "super-strength," further intensifying global warmth over the next year or so. The Met Office has indicated that this event is likely to be significant, with sea-surface temperature anomalies potentially surpassing 1.5C in the central and eastern tropical Pacific. Such a large El Niño would heighten the likelihood of elevated global mean temperatures in 2027, potentially contributing to another year where global averages temporarily exceed 1.5C above pre-industrial levels.
Europe and the UK are not immune to these changes. The Met Office emphasises that El Niño is just one of several climate drivers that can influence weather patterns across the continent. Any specific impacts on the UK will depend on how these various factors combine, with more detailed assessments expected later in the year as forecasts evolve. The Met Office has committed to closely monitoring the developing situation and evaluating its potential effects on British weather.
UK Weather Forecast for This Week
Looking ahead, the UK weather forecast outlines a mix of conditions:
- Tuesday: A chilly but sunny start in northern and eastern areas, with cloud and outbreaks of rain moving northeastwards from the South West. Sunshine will become limited to northern Scotland and eastern England by late afternoon, feeling warmer overall.
- Tuesday Night: Largely cloudy with outbreaks of rain and drizzle, heaviest in the North and West. It will turn windier, and for most, it will be a warmer night compared to recent evenings.
- Wednesday: Bands of rain and showers will move eastwards across the country, potentially heavy at times. It will feel warm during sunnier breaks, though breezy conditions will persist.
- Outlook for Thursday to Saturday: Expect sunshine and showers on Thursday, bright conditions on Friday with rain moving into western areas later, and rain followed by showers on Saturday. Temperatures will feel warm, though breezy at times in the West.
As Britons enjoy the warmer spring weather, the looming threat of a super El Niño serves as a stark reminder of the interconnected nature of global climate systems and their far-reaching effects.
