On Monday morning, there will be scattered high clouds, more significant over the central and eastern parts of Bulgaria. Rain showers are expected in some mountainous areas, the Upper Thracian Plain and the Pre-Balkans, and later in the northeastern parts of the country. The lowest temperatures will range from 9°C to 14°C, around 10°C in Sofia. Maximum temperatures will be between 24°C and 29°C, about 26°C in Sofia. Daytime temperatures will remain lower along the Black Sea coast.

In most mountain areas, the weather will be mostly sunny in the morning hours. Cumulus and cumulonimbus clouds will develop later in the day. Short showers are expected in the massifs in Western Bulgaria, the Rila-Rhodope region and the Balkan Mountains. There will be a moderate westerly and southwesterly wind. The maximum temperature at an altitude of 1,200 meters will be around 18°C, at 2,000 meters around 12°C.

It will be mostly sunny along the Black Sea coast. There will be a light to moderate southerly and southeasterly wind. Daytime highs will range from 17°C to 20°C. The sea water temperature s 13°C-15°C. Sea state 2–3 on the Beaufort scale.