2026–27 Northern Hemisphere Summer Heatwave (Super El Niño peak)
Tuesday 1st December, 2026
A strong El Niño is forecast to develop in mid‑2026, raising the likelihood of a prolonged Northern Hemisphere summer heatwave peaking in late 2026–early 2027 rather than a single hot day; forecasters expect higher-than-normal temperatures and regional heat stress across the UK and Europe. This matters for Rightmove because hotter, drier conditions and more frequent extreme heat will affect housing demand, property valuations, energy and cooling needs, and rental preferences—this gives you a chance to comment on heat resilience, property suitability and market trends in the UK.
Why have we flagged this?
The forecast heatwave could change what homebuyers and renters look for, giving you a timely angle on demand for cooler, more heat-resilient homes.
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