Current sea water temperature:
+56.3°F
| Minimum sea water temperature in December: | 61.0°F |
| Maximum sea water temperature in December: | 52.9°F |
| Average sea water temperature in December: | 56.3°F |
| more information | |
14 days
forecast
forecast
| Opatija |
monthly
weather
weather
| Opatija |
Sea water temperature for the last 10 days:
| December 5 | 56.3°F | November 30 | 58.6°F |
| December 4 | 56.5°F | November 29 | 58.8°F |
| December 3 | 56.7°F | November 28 | 58.8°F |
| December 2 | 56.3°F | November 27 | 59.0°F |
| December 1 | 58.1°F | November 26 | 59.2°F |
Monthly sea water temperature, °F
When is the warmest sea in Opatija?
Based on the data about daily sea water temperature for the last three years the warmest sea in Opatija was noticed in August, July and September.
Monthly Sea Temperatures in Opatija, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 73.7°F. The highest and lowest sea temperatures during the month were 77.0°F and 71.8°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 75.8°F. The highest and lowest sea temperatures during the month were 77.2°F and 73.6°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 72.4°F. The highest and lowest sea temperatures during the month were 73.6°F and 70.9°F.
current
weather
weather
| Opatija |
weather in
December
December
| Opatija |
Best time for vacation in Opatija
Opatija on a weather map
Places in Croatia:
Name
°F
24 Hours Forecast
Opatija
Local time: 10:10
December 05, friday
1200
43°F
SW
6 mph
6 mph
1500
48°F
SW
7 mph
7 mph
1800
45°F
SW
7 mph
7 mph
2100
45°F
SW
8 mph
8 mph
December 06, saturday
0000
39°F
SW
8 mph
8 mph
0300
41°F
SW
7 mph
7 mph
0600
41°F
SW
7 mph
7 mph
0900
41°F
SW
6 mph
6 mph
