Seasonal low pressure is affecting the area.
Sunday will be mainly fine initially although increased cloud in the afternoon may lead to isolated showers, mainly in the mountains and inland.
Temperatures will be 39 C inland, around 34 C on the south and east coasts, around 31 C on the west and north coasts and around 29 C in the mountains.
Tonight will be mainly fine although there may be patchy fog and low cloud at dawn, Temperatures will fall to 24 C inland and on the south and east coasts, around 22 C in the west and north coasts and 18 C in the mountains.
Monday, Tuesday and Wednesday will be mainly fine,
Temperatures will edge up to a little above average for the time of year.