14 day video Issued 4th August 2026 The 14 day video forecast is usually updated weekly. 14 day discussion The 14 day discussion is usually updated twice each week. Heat wave builds Week 1: 09/08 to 15/08 Sunday: Heavy outbreaks of rain become increasingly fragmented as they push southwards and eastwards across the northern half of the UK. Brighter and showery conditions follow to their north. Southern and central areas have a dry and very hot day. Monday: Cloud and light showery rain clears southeastwards, leaving sunny periods in England and Wales. Scotland and Northern Ireland have more cloud, but it will be mostly dry. Cooler in the south, but still warm. Tuesday: Southern and central regions have a fine and hot day. The north has sunny spells, but there will be more cloud at times, particularly in northern Scotland where showers are likely. Wednesday, Thursday, Friday, Saturday: Very hot conditions are expected in southern and central areas, with temperatures into the mid 30Cs. In the north it is likely to become warm or very warm, although it remains more changeable in the north west. By the end of the period it will probably be turning cooler, but there is uncertainty about the rate of the transition and whether it will reach the south. Forecast confidence is high falling to moderate. Ad-free browsing and premium features Subscribe to The Weather Outlook Premium to enjoy ad-free browsing and extra features. Subscribe on a recurring monthly basis or for a fixed 12 month period. Find out more: The Weather Outlook Premium Possibly more changeable Week 2: 16/08 to 22/08 Rather changeable weather is expected in the north, and at times the more mixed theme could extend into the south. Nonetheless, it remains the wettest in the north west and amounts of rain in the south will probably remain generally low, although a few locations could catch some heavy showers. Temperatures remain above the average in the southern half of the UK and there is still the potential for very warm periods to develop. Forecast confidence is very low. Expected developments Week 1 An area of high pressure builds eastwards across the UK and very warm air is drawn up from the continent. The pattern leads to another heatwave developing. Towards the end of the week high pressure in the Atlantic becomes dominant, with cooler air pushing southeastwards across the UK. The chart below is from the UK Met Office Global model. It shows forecast surface conditions at 12:00 Wednesday 12th August. Week 2 High pressure continues to have a good deal of influence in the south. However, there are tentative signs of changes taking place, with a greater chance of areas of low pressure impacting conditions. The chart below shows the GEFS forecast mean surface level pressure on Tuesday 18th August. Key developments Conditions will vary, but amounts of rain in the south are forecast to remain small. Further very hot spells are likely in the southern half of the UK. The UKV chart shows forecast temperatures at 15:00 on Wednesday 12th August.