Monday 24 Aug - Wednesday 2 Sep
This period begins generally unsettled with showers and longer spells of rain at times, which could potentially become heavy in places, particularly in the northwest. This will be accompanied by some strong winds, again most prevalent in the northwest. These wet spells will likely be interspersed with dry spells by the end of the first week of this period, mainly in the southeast, though rain bands will still make their way down south from time to time. Temperatures will probably be around normal, though there could be the odd above average day in the south and southeast. By next weekend, conditions look set to remain largely changeable, though most unsettled in the north and west, with the best of any dry and warm weather in the south and east.
Thursday 3 Sep - Thursday 17 Sep
Although confidence is low for this period, it is likely that conditions will become more changeable with drier and brighter days interspersed with periods of rain and strengthening winds. Temperatures should be around the average for this time of year. Towards the end of this period, there are some tentative signs that high pressure could begin to dominate, especially across the south of the UK, with a return to more settled conditions.
https://www.metoffice.gov.uk/