Temperatures are predicted to soar this week, with London set to comfortably reach double figures - hotter even than the Canary Islands.
Highs of 24 degrees Celsius are forecast for the city on Saturday and Sunday, warmer than holiday destinations such as Lanzarote and Tenerife.
A Met Office spokesman said the weather will be "noticeably warmer inland", although "isolated thunderstorms" are possible.
The hotter weather make a startling change from the snow and sleet which fell this month, with the increase in temperature 7 degrees more than the average for this time of year.
A flurry of snow fell in west London this month, surprising tourists and commuters
Sunday has been earmarked as the hottest day of the month, with temperatures reaching 24 degrees in the middle of the day and lows of a mild 14 degrees.
According to Accuweather, it is the "warmest air so far in spring to surge into England and Wales".
