Prof Penny Endersby

@pennyend.bsky.social

CBE FREng. Chief Executive of the Met Office. Weather, climate, physics, digital & data, with a scatter of wildlife, Dartmoor, old churches and choral music

It’s been a pretty extraordinary first half of summer. I swam in the Channel st nearly 20C today, certainly the warmest British sea swim I’ve ever experienced. Read more about the land and sea temperatures below

Met Office - weather and climate@metoffice.gov.uk · 3w ago

With three widespread heatwaves and numerous climate records already broken this year, we've looked into what we know about meteorological Summer 2026 so far as we reach the halfway point 👇

Great to hear Lord Vallance at the launch of the National Research Organisations. Over 40 government-funded scientific bodies with a mission to maximise the value of our science in support of government’s priorities & ensure that all of government can access this treasure trove of expertise & data.

Lord Vallance, science minister in front of the banner with logos of participating organisations National research organisations logo with our strap line “making research matter” and key areas covered including climate, energy, food, space and security

The UK provisionally set a new maximum temperature record for June for the second consecutive day, with 36.7°C reached at Merryfield, Somerset. Wales also set a provisional June record, while Northern Ireland matched its previous record Get the details here www.metoffice.gov.uk/about-us/new...

New UK June maximum temperature record for second consecutive day

The UK has provisionally set a new maximum temperature record for June for the second consecutive day, with 36.7°C reached at Merryfield, Somerset, on 25 June.

metoffice.gov.uk

I was on a call with DSIT senior officials and heads of arms length bodies yesterday, and one of the experts briefing us was in uniform because London Ambulance had put all reservists on standby. Warnings allow for preparation by responders, as well as reducing harm because people take precautions.

Ed Hawkins@edhawkins.org · last mo.

The London Ambulance Service responded to the highest number of life-threatening emergencies in its history yesterday. The Chief Executive said this was "driven by the extreme heat across London".

The London Ambulance Service responded to the highest number of life-threatening emergencies in its history on Wednesday.

Temperatures soared to 36.1C in parts of the UK on Wednesday, and that record for June has been broken again today.

Ambulance crews responded to 642 calls relating to category 1 incidents - those that include the most serious, life-threatening injuries and illnesses such as cardiac arrests and patients who are not breathing.

Chief Executive Jason Killens KAM said this was "driven by the extreme heat across London".

The UK June record was duly broken yesterday with 36.1C at Gosport, and it will fall again today. This spell also features high humidity and overnight temperatures. My husband commented with surprise on the dewy grass when he took his breakfast out. Very unusual to have dew points widely over 20C.

A close up of grass and clover leaves with dew drops caught on tendrils

I am old enough to remember how extraordinary the 1976 heatwave felt. On the hottest weekend I wore that green velour top and long skirt to a party (the photo is from Feb 76). Fifty years on and a similar event would show much higher temperatures. We expect the record from that June to fall tomorrow

Ten small girls in party finery in a suburban garden. I am third from right in a green top and long frilly skirt
Marco Petagna @petagna.bsky.social · last mo.

UK could see 45°C by 2056, scientists reflect on 1976 heatwave anniversary.. www.metoffice.gov.uk/blog/2026/uk...

Compared to the widespread red heat warning in July 22, the humidity this time will be higher, increasing risk to health. Looks very likely we will break an all time monthly UK maximum for the second month in a row. Please stay safe and follow advice, and a special plea to take care in cold water.

Met Office - weather and climate@metoffice.gov.uk · last mo.

An exceptional spell of hot and humid weather is expected across this region, with impacts to the general population highly likely

Feeling chilly after the end of the heatwave? Always worth a look at “Is the UK hot right now?” This is pretty typical nationwide for early June from the most recent 30 year average ending 2020. Every decade we update the average and it gets warmer each time.

A map of the UK with deviations from the average temperature and a caption “NO - it’s fairly typical “. Average (median) difference from normal -0.7C
The circles are mostly white: they would be red or blue for large positive or negative numbers

Memories of the Summer of 1976 endure in the British memory, 35.9 °C, parched fields, standpipes in the streets. 50 years on and, in the last decade alone, temperatures above 36 °C have been recorded on six days in the UK and the UK’s highest record temperature now stands at 40.3 °C.