Sunday
Slack high pressure will bring dry conditions to most of Britain & Ireland. A cool and bright start with plenty of sunshine. Early mist soon clearing. Cloud tending to build and fill in from the west into the afternoon. Isolated light showers for southern Ireland and over some western hills of Britain. Light winds overall. Temperatures between 17 and 22C, warmest in the east. Cooler on the coast with slight sea breezes.
Sunday night
Staying dry overall. Cloud thinning and breaking overnight to give clear spells. Light winds will allow some mist and fog patches to form in low-lying areas, but this will soon clear after dawn. Chilly again, with temperatures widely into single figures. Lows of 3 to 6C in valleys and glens in the north & west. A local grass frost is likely. Nearer 7 to 10C for the Midlands and south-east.
Monday
A quiet day, with slack pressure across the British Isles. Dry for most places. Isolated showers may affect the far south-west, and also Ireland. Broken cloud and sunny spells. Cloud tending to fill in by afternoon, although coastal areas may keep a good deal of sun. Light winds and coastal sea breezes. Feeling fresh, temperatures typically 16 to 20C, but reaching 22C in the south and south-east.
Tuesday
A slack pressure situation brings a dry and bright day to many areas. A good amount of sunshine for central and southern Britain. Isolated showers may develop by afternoon. Cloud and patchy rain may graze north-east Scotland. Cloudy skies too for Ireland, and an increasing risk of rain developing from the west. Light winds. A cool start, temperatures rising to between 17 and 22C.