Above-average temperatures across the island will continue to prevail on Sunday with a gradual drop expected by Wednesday, the met office said.
On Sunday, temperature will rise to around 39C inland, 33C along the south, east and north coasts, 31C on the west coast and around 28C in the higher mountains.
It will drop at night to 19C inland, 21C along the coast and 18C in the mountains.
On Monday, the weather will be mostly clear with increased cloud cover, which will continue into Tuesday.
The met office does not rule out isolated showers inland and in the mountains. The forecast for Wednesday is the same with temperatures falling to seasonal averages.