Sveti Vlas weather in September 2025
Sveti Vlas weather in September 2025
Day
23 °C
Night
14 °C
Sea
22 °C
Precipitation
48 mm
in month
Rainy days
5 days
in month
Daylight
12 hours
average
Sunshine
8 hours
average
Humidity
74 %
Day
23 °C
Night
14 °C
Sea
22 °C
Precipitation
48 mm
in month
Rainy days
5 days
in month
Daylight
12 hours
average
Sunshine
8 hours
average
Humidity
74 %
Overview: Sveti Vlas
Travel information
Weather charts for Sveti Vlas
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.
Find more destinations like this
Destinations with similar weather to Sveti Vlas
Other destinations in Bulgaria - Coast
Weather overview for Sveti Vlas
Weather overview
In Sveti Vlas in September, the average air temperature ranges from 23 °C (73 °F) during the day to 14 °C (56 °F) at night. There are 5 days of rain on average, where the rainfall is 48 mm (1.88 in).
Are there good conditions to visit in September in Sveti Vlas?
September is a good month to visit Sveti Vlas. The seawater temperature reaches ideal 22 °C (72 °F). You can expect just 5 days of rain during the month, taking an umbrella is not necessary. There are some people, who may feel a slight chill at 23 °C (73 °F), but others will feel perfectly fine. The temperature of 14 °C (56 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the sea temperature in September in Sveti Vlas?
The temperature of the sea in September in Sveti Vlas is 22 °C (72 °F). This warm sea is nice for swimming, maybe cold for some, but most people can spend a long time in it.
What temperature can I expect during the day in Sveti Vlas in September?
In Sveti Vlas in September, the average daily temperatures will be 23 °C (73 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.
What is the average number of rainy days in September in Sveti Vlas?
In September in Sveti Vlas, we can expect 5 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.3 days of the week, or in general - 18 % days.
What is the air temperature in September in Sveti Vlas at night?
The average night temperature in September in Sveti Vlas is 14 °C (56 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.
What is the rainfall intensity in Sveti Vlas in September?
In September in Sveti Vlas, there is 48 mm (1.88 in) rainfall, which means on average 2 mm (0.06 in) rainfall per day.
How many hours of sun to expect in September in Sveti Vlas?
There is an average length of sunshine of 8 hours per day in Sveti Vlas in September.
Is there a wet season in Sveti Vlas in September?
No, there is no wet season in Sveti Vlas in September - you can expect 5 days of rain during the month.
How windy is Sveti Vlas in September?
In Sveti Vlas in September, there will be an average wind scale of 4.
Is the temperature rising or falling in the course of time in September in Sveti Vlas?
During September in Sveti Vlas, the day temperatures are decreasing - from 25 °C (77 °F) at the beginning of the month to 20 °C (68 °F) at the end of the month.
Is the sea in Sveti Vlas warmer in September than in August?
No, the sea is not warmer in September in Sveti Vlas than in August.
Is Sveti Vlas rainier in September than in October?
No, in September in Sveti Vlas it does not rain more than in October.
How long is the day (from dawn till dusk) in Sveti Vlas in September?
The length of daylight in Sveti Vlas in September is 12 hours.
How does the sea temperature evolve during the month in September in Sveti Vlas?
Sveti Vlas has a decreasing trend of the sea temperature during September - from 23 °C (74 °F) in the first days of the month to 20 °C (68 °F) in the last days of the month.
Is the weather in Sveti Vlas warmer in September than in October?
Yes, September in Sveti Vlas is warmer than October by 6 °C (42 °F).