With no gradual build up occuring, today was a classic example of the blowtorch effect that can produce dramatic rises in temperature across a relatively short period.
It's even more marked here, as temps have already dropped to 17.4°C from a high of 30.2°C at 5:15pm. During home-grown hot weather the temperature is usually holding up into the 20's still. In this case, the blowtorch is shifting away east, with fresher air starting to work it's way in - but thanks to higher night-time humidity values (typical occurance) it's hardly noticeable yet in terms of comfort indoors.
Tomorrow IMBY looks to be anything from 20°C to 24°C depending on which model/forecasting institution you refer to... a one day roaster but perhaps very pleasant in the following days 
Bournemouth can be fantastic when there's a blowtorch from the south, good to hear you had a good day Matty Abdul 
Must say, I couldn't stop staring at my own arms after spending many hours cycling in strong sunshine. When working at home to distant deadlines, spotting a day like this almost a week in advance leads to very effective management of workloads 
Daresay I needed the break after the past couple of days, which had me indoors a lot of the time due to my arch enemy, Dr. Drizzle 
Originally Posted by: vince