There'll be some heavy rain fringing southeast England and East Anglia for a time this morning.
Slow moving, thundery showers will then develop over many central and northern parts of England and later on, in southeast Scotland too.
Rain over Northern Ireland will be easing and turning more showery.
Brighter spells between these wetter areas means it will be generally dry for parts of Wales, southwest England and northeast Scotland.
Temperatures will reach 23 or 24 Celsius (73-75F) in the south.