Those still hoping to catch some rays over the bank holiday weekend are more likely to need their brollies than their bikinis after forecasters issued three weather warnings for rain over the next four days.
The first yellow warning for wet weather will come into force at 4pm this afternoon for Northern Ireland and on Saturday the second weather warning predicts heavy rainfall for Northern Ireland, all of the north of England and Scotland.
Met Office spokesman Oli Claydon said: "The key thing I would point out is a lot of the rainfall that's likely to come over the weekend is showers and some may get it and some may not.
"It is variable but where those showers do occur they could be quite intense."
Sun lovers should make the most of Friday when the mercury is expected to hit 30C (86F) in northern Scotland, he said, adding: "It's an absolutely gorgeous day, there is lots of sunshine around.
"There is some cloud starting to move into western Northern Ireland but otherwise it is a clear and sunny day..."
Mr Claydon said the temperatures would remain high overnight (15/16C) and into Saturday, with the warmest places likely to be Aviemore, Scotland (27C or 81F) and London, which could have temperatures of up to 29C (84F).
He said the rain in Northern Ireland was expected to become more persistent and spread eastwards to western Scotland and the north of England.
For anyone worried that the sun will come out on Tuesday when they have to go back to work, Mr Claydon said it was not going to happen as another front is set to move in from the west bringing more cloud and rain.