It's expected to stay above 21C tonight according to the met office.

Very high minima this morning although nothing exceptional.

Plymouth Mountbatten got down to 19.0C at 0300 but then went up to 22.3C at 0400. Has held steady since then. This is currently the warmest place in the UK.

Highest minimums:

St Catherine’s Point 20.6C at 0600

Isle of Portland 20.1C

Overnight minimum here was 14.6C. Hazy sunshine this morning but hopefully we'll challenge 30C today.

I mentioned the other day that getting minima of 20C or higher is exceptionally rare - it's one of the ways to tell if the GFS, for example, has "gone off on one".

Here's the standing as of 5 AM GMT, courtesy of WeatherOnline:

Now, as the overnight minimum is recorded up to 9 AM (IIRC), that means there's a while yet for things to cool down.

The Oxford entry is fake news btw... the actual low was around 15C!

Max yesterday 18 C

Min today 11 C

No heatwave in the NE 👍

Both local stations in gosport recorded min of 20.6C as for me I have yet to check my own but I suspect it will be similar.

In these circumstances using the met office is pointless as their nearest station is Thorney which is for all intents is located out in the sticks.

my location was 21.7C just checked.

Soared past the GFS maximum of 27*C at 11 am. Looking on course for the ARPEGE maximum of 30 or 31*C (depending on which run you look at).

Given how well it's been doing for here, I'm alarmed to see it taking me back into the 30s as soon as Thursday, but looking at the rain charts I see this is because hardly any showers are developed, which is in contrast to the 00z ECM and (especially) GFS runs.

I'm not convinced by GFS to say the least (excessive boundary layer moistening error), but I'm less sure about ECM, which does show some wide swathes of light returns which I presume are localised heavy showers being smeared out (so to speak) by the insufficient resolution (it's high, but not that high).

It's a battle of not that much moisture availability versus diurnal heating. The dryness of the upper layers of the soils and reduced transpiration from vegetation can come into play here; small margins make the difference with convective initiation during slack conditions.

Anyway, ECM has 25*C for me on that day and GFS only 23*C (but the 00z had 25*C like ECM). So shower coverage the main factor there I believe.

Regardless of all that, it looks to hot up again by the weekend, with ECM showing wide swathes into the 30s by Sunday and even wider swathes on Monday. Phwoar.

I bet it's higher than 21c......

You wouldn't know it from the text forecast from MetO, but on their video it does look like crud from the N. Sea gets fed inland on Wednesday and hangs around for much of the day. We'll see.

Scotland has recorded its hottest day on record with 33.2C in Motherwell on June 28th breaking the old record of 32.9C set in August 2003

Is that the highest temperature so far this year in the UK?

Yes

Porthmadog was the last high hitting 32.6c

Despite being sunny and hot here while the winds were very strong as gale force winds making it hard to sit outside for long time.  Not sure why they say breezy when it look like gale force winds.

Porthmadog had got to 33.0c last week. Amazing that Scotland's all time temp record has gone.

Still lower than the Motherwell report but it looks like Porthmadog reached 33.0 on Thursday 28th.

https://twitter.com/metoffice/status/1012473689097596928

Don't think that anything higher than 30.5C has been unearthed from Northern Ireland last week so their all time record of 30.8C from 1976/1983 still stands.

Ahh. They revised that one up as well shortly after midnight

Last I heard it was 32.6c

31c here today absolutely blistering following a sticky 30.5 yesterday and an overnight min of 20c no good for sleeping!

But Thorney has acres of concrete runway to compensate?

Hurn in Dorset was top spot today 31.1c . I don't ever remember a heatwave where the highest temp was so widely spread over the country . we've had Scotland, Wales London , NW and SW all topspots. I would suggest that's unique to this heatwave 

That is what makes this so interesting, day to day it changes and not the usual suspects (minus Porthmadog).

Yes, I agree. Proper equal opportunities heatwave. 

Notable by its absence is Gravesend Broadness. Not even close to top spot on any days. No warm tropical maritime WSW flow. Nor Manston, or Shoeburyness. It’s Retron’s perfect heatwave.

No Heathrow was @ 31.8C :)