October further accentuates the characteristics of autumn weather. The cooling trend in
Sveti Vlas continues with decreasing temperature levels. The rainfall shows an increase compared to the summer months, steeping the city in a moist autumnal glow. The sea, while it loses its summer warmth, still offers relatively comfortable conditions for the avid swimmer. The daylight sees a marked reduction, bringing the shorter days of late fall. October in Sveti Vlas thus draws the soothing picture of a gentle Bulgarian autumn.
Temperature
In Sveti Vlas, the beginning of October is marked by a lowered average high-temperature, shifting from
September's moderately hot 23°C (73.4°F) to an enjoyable 18°C (64.4°F). The average nighttime temperature in Sveti Vlas lowers to a fresh 11°C (51.8°F) throughout October.
Rainfall
In October, in Sveti Vlas, the rain falls for 5 days. Throughout October, 49mm (1.93") of precipitation is accumulated. In Sveti Vlas, during the entire year, the rain falls for 76 days and collects up to 566mm (22.28") of precipitation.
Sea temperature
In Sveti Vlas, the average seawater temperature in October is 18°C (64.4°F).
Note: In water of 18°C (64.4°F), the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in October in Sveti Vlas is 11h and 3min.
On the first day of October, sunrise is at 07:06 and sunset at 18:50 EEST. On the last day of the month, sunrise is at 06:42 and sunset at 17:02 EET.
Note: On Sunday, 27. October 2024, at 04:00, Daylight Saving Time ends, and the time zone changes from EEST to EET. Daylight Saving Time starts again on Sunday, 30.
March 2025, at 03:00; consequently, the time zone reverts from EET to EEST.
Sunshine
The average sunshine in October in Sveti Vlas is 5h.
UV index
The average daily maximum UV index in October is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in October interprets into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.