Overnight: After a largely dry and cloudy evening an area of heavy and often thundery rain will arrive from the south shortly after midnight and persist for the remainder of the night, bringing a risk of localised flooding. Warm and humid.
Today: Rain, often heavy and sometimes thundery, eases away northwards, leaving a legacy of low cloud, hill fog and light rain. Later in the afternoon the rain dies away.
Outlook for Wednesday to Friday: Dry and sunny, once early low cloud, hill fog and mist clears inland, whilst often lingering along the coast. Generally warm and humid inland, but frequently cooler along the coast.