After early morning localised light fog and low cloud clears, Thursday will see increased mainly high cloud and later in the day cloud that may lead to scattered showers and the possibility of isolated thunderstorms in the mountains early in the afternoon.
Temperatures will be 24 C inland, around 23 C on the south and east coasts, around 20 C on the north and west coasts 17 C in the mountains.
Tonight will be mainly fine however there may light fog and low cloud early on Friday morning.
Temperatures will fall to 12 C inland and on the west and north coasts, 13 C on the south and east coasts and 7 C in the mountains.
Friday and Saturday will be mainly fine although there will be increased cloud at intervals at noon and in the afternoon.
Temperatures will remain stable on Friday at above average for the time of year. Saturday will see a small drop to about average for the time of year, falling further on Sunday to below average for the time of year in some areas.