The weather forecast from the Met Office:

A cloudy start with mist and low cloud over the hills and some coastal fog, which will gradually lift and break during the morning to leave bright or sunny spells this afternoon. Feeling quite warm in the brighter skies later with highest temperatures around 20 or 21°C, as the light to moderate south to southwest wind freshens.

Dry this evening but turning cloudy later and overnight as the south to southwest wind becomes fresh to strong, bringing outbreaks of rain towards dawn on Wednesday. Minimum temperature no lower than 15°C.

Wet on Wednesday morning with the rain turning heavy at times, before gradually clearing towards midday or into the early afternoon, leaving the rest of the day dry with some sunshine breaking through. The strong south to southwest wind will turn to the northwest and eases as the rain clears. Top temperature of 17 or possibly 18°C.

Thursday will be bright with sunny intervals and although most places will remain dry a few passing showers are possible, moving through fairly quickly on the fresh westerly wind; highs of 17°C.