Despite temperatures set to be a balmy 21C this week, Brits are warned the brief Indian summer will not last long as snow showers are to hit the UK next month.
While the Met Office has said that the weather will continue to be "unseasonably warm" this week, after quite a mild October, November will be more bleak.
Towards the end of this week, temperatures could peak to 21C on Thursday, and 20C on Friday - with warm nights expected. However, conditions will be unsettled, with blustery winds and showers throughout.
And despite this week seeing an Indian summer - the name used to describe a warm, calm spell of weather that occurs in autumn - around the middle of next month, conditions are expected to take a turn.
Colder days and chillier nights are to come around mid-November, with mist, fog and frost creeping in some places.
Those in the north and west of the country can expect snow showers, so make sure you wrap up warm.
The Met Office's long range forecast for November 9 to 23 reads: "Unsettled conditions are expected to continue at first, with further heavy rain possible.
"An increasing chance of settled weather from mid-month, bringing a potential for colder, drier weather especially for the north and west.
"This would likely bring a risk of chilly nights with mist, frost and fog in places, with some snow possible in any showers in northern and western areas, especially over high ground."
But before the wintry conditions hit, forecasters have said that this week Britons can expect there to be unseasonably warm days and very mild nights.
Maximum temperatures will also be higher than what is expected in late October, with the Met Office saying: "It's been a mild October so far and this week will remain unseasonably warm.
"A trough in the jet stream keeps low pressure anchored to the west of the UK and maintains southerly winds, allowing temperatures to reach the low 20s Celsius in places."
The warmest autumnal temperature in the UK has been recorded on 1 October 2011 in Gravesend, Kent, and 22.4 C on 1 November 2015 at Trawsgoed, Ceredigion.
Today, temperatures have already reached the teens, but the rest of the day will be windier than yesterday. By the end of the day, the weather will hit highs of 19C in the south east, and will continue to be warmer than average over the next few days.
Meanwhile for some areas, the jest stream will cause blustery showers will hit parts of the UK today, with the Environmental Agency issuing one flood warning today for Poole Harbour at West Quay and Lower Hamworthy Quay.
This is in addition to 21 flood alerts in places including the Isle of Wight coast, Christchurch Harbour, Southampton Water and Hamble, and the Mersey Estuary at Warrington.
The outlook for the rest of the week - Friday to Sunday - is very mild, but strong winds and heavy rain are likely to hit the west.
And these unsettled conditions will continue into next week, with temperatures dropping closer to average for the time of year.
UK 5 day weather forecast
Unsettled and very mild, sometimes wet and windy in west.
Today:
Heavy, possibly thundery, rain crossing Scotland this morning, clearing all but the Northern Isles by afternoon. Otherwise sunny spells but scattered showers, mostly in the north and west later. Windy, especially in the west and north, but staying very mild.
Tonight:
Scattered showers in the northwest. Many other areas starting dry but cloud and outbreaks of rain, perhaps heavy, reach southern and then central areas beyond midnight. Very mild again.
Thursday:
Outbreaks of rain, possibly heavy, continuing northwards before clearing most areas, leaving some sunny spells and just isolated showers. Very mild, and feeling quite warm in the south and east.
Outlook for Friday to Sunday:
Staying unsettled and very mild. Some drier, brighter interludes especially in the east, while heavier rain and strong winds are always more likely towards the west.
