This week begins with mild, cloud‑topped mornings and highs around 24 °C (76 °F), rising to a peak close to 28 °C (83 °F) on Tuesday. Expect notably warm sunshine midweek before temperatures ease slightly later on.
Is this the heatwave we’ve been waiting for?
The Met Office originally warned of a heatwave approaching—defined as three consecutive days surpassing local thresholds—especially affecting parts of England and Wales. Temperatures were expected to climb above 30 °C in some areas by Thursday or Friday.
However, while Tuesday may flirt with those thresholds, there’s currently no confirmed heatwave for Wales this week. Still, the warm spell is enough to bring some summer sizzle—but without reaching those sizzling, heatwave‑level extremes.
Persistent change, rising risks
This summer has been extraordinary. Spring 2025 was officially the UK’s warmest and sunniest on record, accompanied by one of the driest starts to summer ever. Since then, the pattern of record‑breaking heat has continued. The Met Office estimates the chance of seeing another 40 °C day in the UK within the next 12 years sits at 50‑50.
This evolving backdrop of warming is more than just a matter of comfort—it poses real hazards to vulnerable populations, strains health services, and underscores the growing influence of climate change.
What to expect in Wales this week
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Monday–Tuesday: Warm and pleasant—ideal for outdoor plans, but keep hydrated, especially in the afternoon.
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Wednesday: A mix of cloud and the odd shower, particularly in northern or elevated parts. Still warm, but noticeably less intense.
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Thursday–Friday: A chance for sun with lingering low clouds; highs likely in the low- to mid-20s °C range.
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Weekend Outlook: Continued mild warmth, but no indication of the kind of heat sufficiently sustained to meet official heatwave criteria.
Take-away
Wales is in for a summery spell—warm, pleasant, and imbued with a touch of that elusive heatwave thrill, but without the full criteria being met. Enjoy the sun safely: stay hydrated, seek shade during peak hours, and check local forecasts for any sudden showers.
