UK Weather: Weekend rain brings relief, but could another UK heatwave be next? The Met Office forecasts the reign of high-pressure to be soon over, as Atlantic weather fronts will take its place in influencing the UK weather. Weather fronts carrying rain will approach the UK from the west today. Prior to the movement of the center of this low, its weather fronts will sweep through the country during the weekend. Showers for the whole of the UK on SundayBack-to-back weather fronts are forecast to sweep through the country during the weekend.