London is expected to have very hot weather as summer officially starts.

As the sun rises in London, many city dwellers are dreaming of a day at the beach. And for once, the UK weather is cooperating, bringing us the summer we've all been longing for. A mini-heatwave is sweeping across the country, and London is in for a treat with temperatures reaching a high of 27°C. It's a welcome change from the dreary and stormy weather we've endured throughout most of June and July.

Those lucky enough to be on summer holidays in the UK can rejoice as the latest Met Office forecast promises good news. Despite a foggy start on Sunday morning, the fog is expected to dissipate quickly, leaving us with a fine day filled with prolonged sunshine. The forecast for Greater London predicts a warmer and more humid day compared to Saturday, with light winds and a maximum temperature of 27°C.

But the heatwave won't be short-lived, as it is set to continue into the beginning of next week. However, the Met Office cautions that this will also bring some very humid weather, especially during the evenings. So, while it may be hot and humid in London today, it's all part of the summer experience.

In the UK, a heatwave is officially declared when a location experiences at least three consecutive days with a daily maximum temperature that meets or exceeds its heatwave threshold. This threshold varies by county, with most of the UK set at 25°C, while London and southern and eastern areas have thresholds of 27°C or 28°C.

According to David Hayter, a deputy chief meteorologist at the Met Office, the weekend will see a weakening of the jet stream to the west of the UK, creating an area of high pressure that will slowly move across the country. This high pressure system will bring drier, settled, and sunnier weather, and temperatures are expected to rise above average. Some areas in the south may even reach a maximum of 27°C, while the northeast is likely to see temperatures of 25°C by Sunday.

However, it's no surprise that London and the southeast are basking in the best weather this weekend and early next week. But there may be some patchy clouds in Northern Ireland, south and west Scotland, and the northern isles, resulting in lower temperatures in those areas, according to David.

But as with all good things, this heatwave is not expected to last forever. The Met Office predicts a potential breakdown from mid-week, with the possibility of thunderstorms. So, while we enjoy the summer sunshine, it's always wise to keep an eye on the forecast and be prepared for any changes. Stay cool, London!

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