Sunday promises mostly sunny skies, although clouds will briefly gather over mountainous and eastern regions around midday and beyond. A light westerly breeze will prevail, shifting to a south-southwesterly direction in the evening. Overnight lows will be between 9°C and 14°C, with Sofia expected to be around 8°, while daytime highs will be between 25°C and 30°C, with Sofia around 26°.

In the mountains it will be mostly sunny, with occasional clouds in the afternoon. A moderate breeze will blow from the north-northwest. The maximum temperature will be around 18°C at 1,200 m and around 10°C at 2,000 m.

Along the Black Sea coast it will be mostly sunny, with temporary clouds increasing around noon and later. Light to moderate winds will blow from the south-southeast. Maximum temperatures will be between 20°C and 24°C, while sea temperatures will be around 15°C. Sea swell will be around 2.

The Balkans will be sunny and warm with temperatures continuing to rise. It will be 30 degrees in Belgrade, 27 in Athens and Bucharest, and 22 in Istanbul.