Western Wales will have a cloudy morning with some light rain at times, inland there will be chinks of sunshine. By lunchtime the frontal rain will be moving in from the north with some heavy bursts over Snowdonia. The southern half of Wales could reach 19 to21C and feel pleasantly warm but further north in the cloud and rain only 13 or 14C. The front then falters later in the afternoon and begins to break up, so Cardiff could keep the fine weather

A warm and humid day for England with temperatures widely 18 to 21C and higher for Gt London and Anglia. With the breeze off the sea, western England will be a bit cool, Morecambe Bay, north coast of Devon and Cornwall and see more cloud and some dampness. The frontal rain will move over northern England this morning with heavy bursts of NW England but some part of NE England escaping in the shelter of the Pennines. Gt.Manchester and Cheshire will see wet weather after midday with the fragmenting frontal band moving into the Midlands and Norfolk later in the afternoon. Temperatures will then fall here, although the heat over E.Anglia may pep up the odd downpour this evening

As the cold front clears southern England, there will be clearer skies, not as much low cloud and a slightly fresher feel. Southern Britain remains at 14C but central and northern areas will have a cooler night 7 to 9C

More fresh westerly winds on Thursday

Scotland is cool on Thursday due to a brisk West wind. These brisk winds off the Atlantic will also affect northern parts of N.Ireland and NW England. Northwest Scotland continues to see plenty of showers but much of the UK should be dry and bright with some cloud and sunny spells. This will probably be the coolest day of the week, but southern England will still reach 21C (70F). Then a cooler night, widely down to 7C as the winds ease off for Friday.

Friday is quite settled with more cloud in the north and east but more sunny spells for the west and south. The NW breeze will make Scotland and NW England still feel cool, but N.Ireland will be warmer at 17 or 18C and southern Britain not bad at 17 to 21C

Saturday looks warmer everywhere but with showery outbreaks of rain for a few spots.