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Saturday starts mostly fine but, however in the far north there is some patchy rain. Through the rest of the day sunny periods develop widely but there will some cloud around. In the northern half of Scotland it generally remains overcast and there is an ongoing risk of light outbreaks of rain.

Temperatures range from 11C (52F) in the far north west to 25C (77F) in the south. See the rain radar for the latest view.

Hirlam, forecast cloud cover, 16:00 BST Sat 23rd June

Summer weather outlook

Seasonal forecast for June, July and August

Summer forecast overview

Tonight it will be dry with clear spells. In the north temperatures drop into single figures but in the south minimum values are likely to be close to 12C (54F).

Tomorrow the fine weather continues and the warmth spreads northwards. In eastern Scotland temperatures could reach 23C (73F) and in southern England 28C (82F) is possible.

GFS, forecast temperatures, 16:00 BST Sun 24th June

Heat wave next week

On Monday and Tuesday high pressure centred over the UK bring weather to all areas. It will be very warm and in the southern half of the UK temperatures should reach the upper 20Cs.

During the middle part of the week high pressure becomes positioned to the east. The fine spell continues and there is the potential for temperatures to reach or exceed 30C (86F) in much of the UK.

The heatwave probably goes on through the rest of the week but there is uncertainty about the details. A few computer model runs have shown the heat peaking towards next weekend with temperatures possibly climbing up towards the mid 30Cs. However those values are at the very top end of the predictions.

GFS, 850hPa temperatures and pressure, 16:00 BST Fri 29th June

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16 day GEFS ensembles at a glance

Dry and very warm or hot weather is shown for much of the period. In early July the risk of showery rain increases slightly in the south. View latest GEFS.