Strong to gale-force southwest winds will blow along the Black Sea coast on Friday. Waves will reach 3 to 4 on the sea scale, and daytime highs will be 21C to 23C.
Early in the morning, low stratus cloud and poorer visibility are expected along the southern coast. Later the cloud will vary. The sea will be 16C to 18C.
A well-defined cold front will cross Bulgaria on Saturday. The wind will turn northwest, get stronger and bring cold air. Rain will move from northwest to southeast and reach many places, with thunder possible in the south. In the evening the wind in eastern Bulgaria will blow from the north-northeast.
By 2pm on Saturday, temperatures in northern Bulgaria and on the high plains will be 6C to 11C, and in southern Bulgaria 13C to 18C.
Overnight the sky will be broken to mostly heavy cloud, and the rain will fall mainly in central areas. From after midnight until morning, low stratus cloud will form in places in the Upper Thracian Plain and the western Danube basin, and fog with drizzle will cut visibility. The south-southwest wind will get stronger still and reach gale force in eastern Bulgaria and on the northern mountain slopes. The lowest temperatures will be 11C to 16C, and about 12C in Sofia. Air pressure is below the monthly average and will keep falling.
Tomorrow will be warm for the time of year across Bulgaria, with changing cloud and highs of 20C to 25C. Where the south wind is strong, temperatures will reach 27C to 28C, and in Sofia about 21C. The wind will be moderate to strong, and gale-force in eastern Bulgaria and near the northern mountain slopes. Towards evening, cloud will thicken from the northwest and rain will start.
In the mountains the cloud will vary, more often heavy, with light rain in places. The west-southwest wind will be strong, and gale-force on the high ground and northern slopes. It will be about 14C at 1,200 metres and about 9C at 2,000 metres.
On Sunday the wind will ease, and by the end of the day it will blow from the southeast everywhere. It will turn warmer again. Skies will be mostly cloudy, with light rain in a few places. Lows will be 0C to 5C, and highs 7C to 12C.
Hourly forecast and the days ahead: Weather in Burgas →