Current sea water temperature:
+55.9°F
| Minimum sea water temperature in December: | 60.8°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
| Rijeka |
monthly
weather
weather
| Rijeka |
Sea water temperature for the last 10 days:
| December 19 | 55.9°F | December 14 | 56.7°F |
| December 18 | 56.1°F | December 13 | 56.3°F |
| December 17 | 56.3°F | December 12 | 55.9°F |
| December 16 | 56.3°F | December 11 | 55.8°F |
| December 15 | 56.3°F | December 10 | 57.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Rijeka?
Based on the data about daily sea water temperature for the last three years the warmest sea in Rijeka was noticed in August, July and September.
Monthly Sea Temperatures in Rijeka, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 73.6°F. The highest and lowest sea temperatures during the month were 76.1°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 75.9°F. The highest and lowest sea temperatures during the month were 77.4°F and 74.3°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 72.3°F. The highest and lowest sea temperatures during the month were 73.8°F and 70.7°F.
current
weather
weather
| Rijeka |
weather in
December
December
| Rijeka |
Best time for vacation in Rijeka
Rijeka on a weather map
Places in Croatia:
Name
°F
24 Hours Forecast
Rijeka
Local time: 21:18
December 20, saturday
0000
48°F
W
0 mph
0 mph
0300
46°F
SW
2 mph
2 mph
0600
45°F
SW
2 mph
2 mph
0900
46°F
SW
3 mph
3 mph
1200
55°F
SW
4 mph
4 mph
1500
54°F
SW
3 mph
3 mph
1800
48°F
SW
6 mph
6 mph
2100
48°F
SW
6 mph
6 mph
