Scotland and the far north of England are in the firing line for torrential downpours and 55mph gales tomorrow and Sunday.
A vastly different picture across the rest of the country will bring 24C (75F) warmth, sunshine and largely settled conditions.
However change is afoot as two former hurricanes size up Britain for a full-blown assault at the start of October.
Maria and Jose, currently sweeping the eastern coasts of northern and central America, threaten to join forces and smash the UK shortly after next weekend.
While the degree of impact is still uncertain, forecasters predict a general breakdown in the calm and sunny conditions.
Britain’s weather will turn much more unsettled from mid-week as a complex system straddling Eurasia starts to realign.
A huge area of high pressure stretching from Russia to the UK is currently holding Atlantic storms at bay by batting them away to the northwest.
This high pressure set up is blocking any widespread effects from an area of low pressure set to hit northern Britain over the weekend.
However meteorologists predict it will gradually weaken opening the gates to a barrage of storms from the Atlantic.
Katie Greening, a forecaster with The Weather Company, said the change in weather is likely to set in during the middle of next week.
She said: “There is a relatively strong ridge of high pressure over Russia at the moment blocking low pressure systems from moving across the UK.
“However from next Thursday we expect these lows to start becoming strong enough to nudge this high away, this will allow them to take a more direct path across Britain.
“We think the impacts will mostly affect northern and western parts of the country as things become more mobile.”
She said the weather will take another hit from a post-tropical cyclone Jose and Hurricane Maria – currently category 3 – the following week.
The two storms will join before being picked up by the jet stream and pulled towards the UK during the first week of October, she added.
She said: “Maria is currently a category-3 storm, it is going to engulf Jose before being picked up by the jet stream and brought over the Atlantic to us.
“There is still a lot of uncertainty around this outcome, but if Maria keeps the winds strengths we could be looking at an ex-hurricane situation.
“If it does come this way it would probably be renamed in line with the British system, so could generate Storm Brian.
“We expect this to start happening from the first Monday in October.”
The Met Office said Britain’s weather will widely turn more unsettled from around the middle of next week.
Forecaster Oli Claydon said this weekend will bring a northwest-southeast split with the far fringes of Scotland and the western coasts likely to catch the worst of the weather.
He said: “There will be some rainfall in the northwest this weekend and some further south although this is not looking as bad as we originally thought.
“It will be blustery around Scotland with gusts of between 47 mph and 54 mph possible in parts, for the rest of the country it will be largely dry and warm.
“We retain this Scandinavian high blocking pattern which is keeping unsettled weather systems from the Atlantic at bay until the middle of next week when it starts to weaken.
“This will allow low pressure to encroach in from the west, impacts are more likely in the northwest with the southeast having the best chance of staying settled.
“However we are going to see more changeable weather by the end of next week.”
Jim Dale, forecaster for British Weather Services, said unsettled conditions will be given a boost by a shift in the jet stream.
He said the jet – a rapidly flowing ribbon of air which circulates at high altitude – will dip southwards creating a conveyor belt effect across Britain.
He said: “The active zone is now level with Ireland as the jet stream dips southwards into our part of the Atlantic.
“We have a low pressure system affecting the weather in the northwest this weekend, but thanks to the high pressure to the east it will not affect the rest of the country.
“South of this parent low we expect to see further systems spawning from it, and into next week there is the risk of another intense low pressure bringing increasing winds and gales to the west of the country.
“Next weekend is going to be interesting, especially as the blocking high to the east of Britain starts to migrate further from us.”