The weather forecast from the Met Office:

Fine today with a good deal of sunshine. The light southeast wind will slowly freshen, temperatures reaching 19 Celsius at best away from windward coasts.

Saturday will be breezy but generally dry and bright with sunny spells; there’s just the risk of one or two showers developing later in the evening. Top temperature 20°C, with fresh or strong winds from the southeast.

Patchy rain developing overnight and on Sunday morning, becoming more widespread for a while in the afternoon and possibly turning heavy at times. At least it’ll become less breezy, with temperatures peaking at 18°C.