The weather on Sunday will be mostly clear, with a chance of partial cloudiness later in the day, the met office said.
Temperatures will rise to 25 degrees Celsius inland, 26 on the coast, and 18 in the mountains.
In the evening the weather will remain clear, and temperatures are expected to fall to 12 degrees Celcius inland, 16 on the coast, and 7 in the mountains.
The weather is expected to remain the same over the next three days.