Overnight the winds fall light and variable, this will allow some mist and fog patches to develop. It will be a mild and muggy night with lows of 12-14C.
Tuesday morning sees a band of cloud and light patchy rain moving into northern and western areas. It's likely to struggle to make much progress south and east during the day. As a result this will be the best place to see sunny spells during the day. Here too will be the best temperatures, 23C.
Wednesday should be a brighter day with light winds and above average temperatures. Thursday will be much like Tuesday with some weak rain and cloud for parts of Wales. Friday is likely to be a rather cloudy day too.