Sunny Beach Weather in December
In Sunny Beach, December brings low daytime temperatures around 9°C (48°F), with nights cooling to 3°C (37°F). Expect quite a bit of rainfall this month.
Rainfall in Sunny Beach in December
On average, there are about 8 days with rain during this month, averaging 64 mm (2.5 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Sunny Beach in December
Temperatures in Sunny Beach in December top out at 9°C (48°F) and drop to 3°C (37°F) overnight. The winter season takes place during December. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. At 3°C (37°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Sunny Beach in December
You can expect a moderate amount of sunlight, with approximately 103 hours. This means a pleasant mix of sun and overcast.
Average water temperature in December
The water sits at 11°C (52°F) this month, which is well below what most people consider swimmable. Wetsuits help, but expect it to still feel cold.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August and September typically offer the best weather for Sunny Beach.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bulgaria, check out our Sunny Beach's climate page.
Sunny Beach Temperature in December
Min Temperature
3°C (37°F)
Max Temperature
9°C (48°F)
Water Temperature
11°C (52°F)
Chance of Rain
27%
Precipitation
64 mm (2.5 in)
Rainy days
8 days
Humidity
81%
Sunshine
103 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Sunny Beach typically stay consistent throughout December, with daily highs averaging around 9°C (48°F). Nights are cold, with lows typically ranging from 0°C (32°F) to 3°C (37°F).
Average temperatures in December
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Sunny Beach in December
Browse day-by-day weather records for Sunny Beach spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sunny Beach historical weather extremes in December
Based on 28 years of weather observations (1997-2025), these are the most extreme conditions recorded in Sunny Beach.
- Sunny Beach recorded its highest December temperature of 21°C (70°F) on December 2, 2023.
- Sunny Beach registered its coldest December night on December 19, 1997, with temperatures dropping to -13°C (9°F).
Best Places in Bulgaria in December
Find out more about the weather in Bulgaria and which places have the best travel conditions in this month. See all of Bulgaria in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Sunny Beach in December
Dress warmly and in layers for your trip to Sunny Beach in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 11°C (52°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Sunny Beach in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bulgaria, check out our Sunny Beach's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Sunny Beach climate overview or explore weather in Bulgaria.
