Average sea water temperature in December:
+48.7°F
| Minimum sea water temperature in December: | 55.6°F |
| Maximum sea water temperature in December: | 42.1°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 49.9°F. The highest and lowest sea temperatures during the month were 55.6°F and 43.3°F.
Monthly sea water temperature in Mamaia, °F
Which Romania resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Eforie Nord | 51.3°F | 50.6°F |
| Mangalia | 51.1°F | 50.5°F |
| Konstanta | 50.0°F | 49.7°F |
| Mamaia | 49.9°F | 49.7°F |
Best time for vacation in Mamaia
Mamaia on a weather map
Places in Romania:
Name
°F
24 Hours Forecast
Mamaia
Local time: 20:11
May 17, sunday
2100

57°F
S
11 mph
11 mph
May 18, monday
0000

54°F
SE
19 mph
19 mph
0300

54°F
SE
20 mph
20 mph
0600

52°F
E
18 mph
18 mph
0900

55°F
E
20 mph
20 mph
1200

63°F
E
19 mph
19 mph
1500

68°F
E
14 mph
14 mph
1800

68°F
E
12 mph
12 mph



























