Group of people standing on a pier looking out to sea. Many are wearing coats, and it also looks quite breezy
Much of the UK is set to feel cooler from Tuesday, as more changeable weather moves in.
Parts of the UK are also likely to see some spells of rain, especially to northern and western parts of the UK.
The rest of the week stays a little unsettled with further spells of rain.
It could turn more settled into next week with temperatures rising above average for some, though heatwave conditions are looking increasingly unlikely.
Tuesday will start off relatively warm and muggy across central and south-eastern areas of England but further north and west it will start to feel a little cooler.
That cooler air will be moving south-east behind a cold front that will also bring a spell of rain across England and Wales for a time.
Fresher north-westerly winds will develop across all areas bringing showers - some heavy - to Scotland, Northern Ireland and more north-western parts of England and Wales.
Maximum temperatures will be around five degrees lower than Monday's values with 17 to 22C across the UK.
This is closer to the average for the time of year.
Two maps of the UK, the one on the left is coloured orange and the one on the right is white
There will be a drier and brighter interlude on Wednesday, with the rest of the week staying a little unsettled with further spells of rain.
Temperatures will remain around average at 15 to 20C.
It will also start to feel a little chillier overnight with temperatures down to 8-12C - meaning those on early commutes to work or school might need to start donning extra layers.
However, while it might feel more autumnal and the right time to pack away the summer clothes, autumn - particularly September - is a fickle time.
Conditions can change with a simple switch in wind direction and we can go from chillier, autumnal weather to warmer conditions and then back again - all within a day.
By Saturday, a west or south-westerly wind will bring something a little warmer with temperatures returning to above average.
With some signs of high pressure building and the prospect of drier and brighter weather, it might feel pleasantly warm for some, especially in south-eastern areas.
It is still a long way off but temperatures could rise temporarily further into next week.
The signs are, though, that a September heatwave is increasingly less likely.
