The 12z GEFS for London continues to show the op being a marked outlier. This has to be some sort of gridpoint issue, surely...

(Note the op showing minima in the 20s by the end of the week. That's pretty rare even in record-breaking heatwaves.)

Luckily I don't live in London. It's not going to be hot where I am, at least not unless the sea breeze gives up!

GEFS shows mean highs of around 21C here through next week.

Nope. Look at the high-res and you'll see that Sheppey sticks out into relatively lower temps!

http://www.meteociel.fr/modeles/geme_cartes.php?ech=6&code=0&mode=9&carte=2&archive=0

The sea breeze would, in reality, knock a couple of degrees off that too. It's exceptionally rare here to get even into the mid 20s with a breeze blowing in from the sea.

Even in 2003, the temperature fell from 36 to 23 as soon as the wind switched round, and that's despite the rest of the afternoon having wafted that 36C air over the sea!

EDIT: Shouldn't you be cheering on NAVGEM, anyway?

http://images.meteociel.fr/im/9024/navgemfr-8-126_koi5.png

GEM ENS P08 is better - significantly hotter than the op throughout.

Takes the crown this evening for legendary run.

http://www.meteociel.fr/modeles/cmc_cartes.php?code=8&ech=216&mode=0&carte=0

Yes Darren good smoke screen but you can add 10c in your flat

or if you’re a wetterzentrale person like me, there’s this:http://www.wetterzentrale.de/topkarten.php?map=1&model=GEM&var=2&time=168&run=12&lid=P08&h=0&tr=6

Fab set some 30,s in the mixer for London add on 2 or 3c 

http://www.meteociel.fr/modeles/gefs_table.php?x=0&y=0&lat=51.5085&lon=-0.12574&run=12&ext=fr&mode=7&sort=0

Coming into the reliable those look hot to me ukmo usually quite sensible about things about heat

http://www.meteociel.fr/modeles/ukmo2.php?nh=0&ech=120&carte=1021

http://www.meteociel.fr/modeles/ukmo2.php?nh=0&ech=120&carte=1007

Hot ECM from 96h to 240h. 30 + each day you'd imagine 

Good grief winds backing s/e later on then s on ecm very hot charts for s/e

216 has to be a 35c chart for London surely id tick the box that said yes in an exam anyway.

That really does look like a Jires special 

http://old.wetterzentrale.de/pics/MT8_London_ens.png 

I wonder how 18z will deal with these sypnotics... could February’s SSW still be having a (positive) knock on effect in this part of the world?

Almost as fun as winter when rare extremes look more likely.

His decorated it nicely this year  notice the inside shutters are up 

I don't think we can talk about prolonged heat and not talk about July '06, which has to be the mother of all heat spells...

All joking aside though, I hope we don't see wildfires.....I spend many times in Australia and the countryside is looking very dry and Australian-esque at the moment. I fear there is quite a high fire danger.

I don't think so. Here are the T2m maximum temperature charts for the ECM model. No 30C until next Saturday.

Generally the maximum temperatures are to the west of London due to easterly winds. That only changes on 1st July on this ECM run when the winds move to the south and the Essex / Kent area then becomes hot.

Wednesday 27th - maximum of 80F so someway below 30C

https://weather.us/model-charts/euro/2a331d14c080dc858c972f7d81b3ce7f/max-temp-2m-6h/20180627-1800z.html

Thursday 28th - maximum of 85F so very close to 30C

https://weather.us/model-charts/euro/2a331d14c080dc858c972f7d81b3ce7f/max-temp-2m-6h/20180628-1800z.html

Friday 29th - maximum of 84F

https://weather.us/model-charts/euro/2a331d14c080dc858c972f7d81b3ce7f/max-temp-2m-6h/20180629-1800z.html

Saturday 30th - maximum of 87F (that is above 30C)

https://weather.us/model-charts/euro/2a331d14c080dc858c972f7d81b3ce7f/max-temp-2m-6h/20180630-1800z.html

Sunday 1st - maximum of 91F (Gravesend probably)

https://weather.us/model-charts/euro/d9409acde1dee6f24e1e387817db7dfa/max-temp-2m-6h/20180701-1800z.html