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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the Culture Observer weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The next UK heatwave is not forecast within the next 14 days, but the official heatwave season runs from June to September; according to the Met Office, the first sustained hot spell typically arrives in late June or early July. The live ranking above compares current temperatures and humidity across UK cities.
What counts as a heatwave in the UK?
The Met Office defines a heatwave as three or more consecutive days when the daily maximum temperature meets or exceeds a threshold specific to each county (ranging from 25°C in northern areas to 28°C in London). Unlike a 10 Day Weather Forecast UK showing occasional warm days, a true heatwave requires sustained, region-specific heat. The live ranking above uses these same thresholds to indicate how close each city is to heatwave conditions.
When is the next heatwave likely?
Although no storm to hit Britain this weekend is expected, the UK weather hub shows a gradual warming trend through late spring. For those asking “when will it start getting warmer UK 2026”, long-range models point to a typical pattern: a brief warm spell in mid-May, then a more prolonged hot period in late June or July. Early signals for UK heatwave 2026 suggest it may align with the historical average, but no official alert has been issued yet. The UK Met Office Amber Snow Warning page is unrelated; unlike snow events, heatwaves are not yet forecast with similar certainty.
When does the Met Office declare a heatwave?
When a specific county records at least three consecutive days above its local temperature threshold. Local thresholds vary from 25°C to 28°C. The Met Office then issues a heat health alert, often in partnership with the NHS.
Will there be a heatwave in the UK in 2026?
It is likely, though not guaranteed. Long-range signals point to a normal summer pattern. For the most accurate view, check the 10 Day Weather Forecast UK page and the live ranking above.
How can I prepare for a UK heatwave?
Stay hydrated, avoid the sun between 11am and 3pm, and check NHS guidance on heat exhaustion. The RSPCA also advises keeping pets cool. Local authorities often open cooling centres during extreme events.