UK Bank Holiday Monday to hit 30°C before storms roll in — here’s what to know

Britain is bracing for a dramatic shift in weather as the August bank holiday delivers one last blast of summer heat before turning wet and windy.

Temperatures could climb to 30°C on Monday, particularly across the Midlands, north-west England, and parts of Wales, where forecasters say records for the late August bank holiday could be broken. In London, the Notting Hill Carnival crowd is expected to enjoy highs of up to 28°C, while eastern Wales may reach 27°C, surpassing its 1991 record. Northern Ireland and Scotland could also see historic temperature milestones fall.

The Met Office confirmed that this summer is already one of the hottest on record, with four official heatwaves declared. But the sunshine won’t last. By Monday evening, the remnants of Hurricane Erin are forecast to push across Northern Ireland and into the rest of the UK, bringing rain, gusts of up to 40mph, and much cooler conditions for the remainder of the week.

Where Will Be Hottest?

• West Midlands, Cheshire, Merseyside, Greater Manchester – 29–30°C

• Wales – possible record-breaking 27°C

• London (Notting Hill Carnival) – around 28°C

  
  
  

• Northern Ireland – record-challenging 24°C

• Scotland – could top 26°C, its warmest late August Monday on record

From Heat to Rain: What’s Next?
Tuesday may still bring warmth to East Anglia and the South East, with temperatures up to 27°C, but the rest of the week looks unsettled. By Friday, most areas will see cooler conditions between 16–19°C, with showers and prolonged spells of rain.

The return of rainfall will be welcomed in parts of southern England, where August has been unusually dry. South Farnborough in Hampshire, for instance, has yet to record measurable rain this month, while many areas have seen less than 1mm.

Travel Disruption and Safety Warnings
Holidaymakers making the most of the sunshine could face transport headaches.

• CrossCountry rail strike: Major disruption, especially for festival-goers returning from Leeds.

• LNER engineering works: No trains in or out of London King’s Cross.

• Coastal safety: The RNLI has urged beachgoers to stick to lifeguarded beaches as stronger waves roll in with the changing weather.

Climate Context
While individual weather events cannot always be directly attributed to climate change, scientists say hotter, longer, and more frequent heatwaves are consistent with global warming trends. With four heatwaves in one summer and unusually dry conditions, 2025 has underscored the intensifying extremes of the UK climate.

Bank holiday Monday will give Britons one more day of blazing sunshine before Erin’s remnants usher in a blustery, wetter end to August. For many, it’s the perfect excuse to head outdoors one last time before autumn truly sets in.