18.12
thu
thu
Day
48°F
N 2 mph
Precip.
78%
78%
Night
45°F
NE 1 mph
Precip.
81%
81%
19.12
fri
fri
Day
46°F
NE 2 mph
Precip.
70%
70%
Night
46°F
S 1 mph
Precip.
82%
82%
20.12
sat
sat
Day
54°F
SW 4 mph
Precip.
0%
0%
Night
45°F
SW 6 mph
Precip.
0%
0%
21.12
sun
sun
Day
48°F
SW 4 mph
Precip.
0%
0%
Night
43°F
SW 4 mph
Precip.
0%
0%
22.12
mon
mon
Day
50°F
W 2 mph
Precip.
65%
65%
Night
46°F
NW 6 mph
Precip.
100%
100%
23.12
tue
tue
Day
50°F
W 1 mph
Precip.
100%
100%
Night
46°F
SW 3 mph
Precip.
100%
100%
24.12
wed
wed
Day
48°F
NW 2 mph
Precip.
100%
100%
Night
46°F
SW 2 mph
Precip.
86%
86%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 56.6°F. The highest and lowest sea temperatures during the month were 57.9°F and 55.8°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 53.5°F. The highest and lowest sea temperatures during the month were 55.0°F and 52.0°F.
Air temperature in Rijeka, °F
Precipitation total in Rijeka, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Rijeka
Rijeka on a weather map
Places in Croatia:
Name
°F
24 Hours Forecast
Rijeka
Local time: 10:32
December 18, thursday
1200
48°F
N
2 mph
2 mph
1500
54°F
NE
2 mph
2 mph
1800
52°F
N
1 mph
1 mph
2100
50°F
NW
1 mph
1 mph
December 19, friday
0000
45°F
NE
1 mph
1 mph
0300
45°F
N
2 mph
2 mph
0600
45°F
N
2 mph
2 mph
0900
45°F
N
2 mph
2 mph
