20.05
wed
wed
Day
70°F
SW 4 mph
Precip.
0%
0%
Night
52°F
S 6 mph
Precip.
0%
0%
21.05
thu
thu
Day
72°F
SW 1 mph
Precip.
0%
0%
Night
54°F
S 6 mph
Precip.
0%
0%
22.05
fri
fri
Day
72°F
SW 5 mph
Precip.
0%
0%
Night
55°F
S 6 mph
Precip.
0%
0%
23.05
sat
sat
Day
72°F
SW 11 mph
Precip.
0%
0%
Night
57°F
SW 6 mph
Precip.
0%
0%
24.05
sun
sun
Day
75°F
W 4 mph
Precip.
0%
0%
Night
59°F
SW 6 mph
Precip.
0%
0%
25.05
mon
mon
Day
79°F
SW 3 mph
Precip.
0%
0%
Night
63°F
SW 6 mph
Precip.
0%
0%
26.05
tue
tue
Day
77°F
SW 6 mph
Precip.
0%
0%
Night
59°F
SW 6 mph
Precip.
0%
0%
27.05
wed
wed
Day
79°F
W 3 mph
Precip.
0%
0%
Night
61°F
S 3 mph
Precip.
0%
0%
28.05
thu
thu
Day
75°F
NE 4 mph
Precip.
0%
0%
Night
57°F
SW 1 mph
Precip.
0%
0%
29.05
fri
fri
Day
70°F
N 6 mph
Precip.
80%
80%
Night
57°F
SW 3 mph
Precip.
23%
23%
30.05
sat
sat
Day
70°F
NE 5 mph
Precip.
80%
80%
Night
55°F
W 2 mph
Precip.
100%
100%
31.05
sun
sun
Day
61°F
SW 5 mph
Precip.
47%
47%
Night
57°F
SW 2 mph
Precip.
30%
30%
01.06
mon
mon
Day
68°F
N 4 mph
Precip.
100%
100%
Night
57°F
SW 3 mph
Precip.
0%
0%
02.06
tue
tue
Day
73°F
N 4 mph
Precip.
0%
0%
Night
61°F
SW 2 mph
Precip.
0%
0%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 60.8°F. The highest and lowest sea temperatures during the month were 62.6°F and 58.6°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 71.4°F. The highest and lowest sea temperatures during the month were 77.0°F and 64.9°F.
Air temperature in Opatija, °F
Precipitation total in Opatija, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Opatija
Opatija on a weather map
Places in Croatia:
Name
°F
24 Hours Forecast
Opatija
Local time: 01:24
May 20, wednesday
0300
50°F
S
6 mph
6 mph
0600
50°F
SW
6 mph
6 mph
0900
64°F
SW
4 mph
4 mph
1200
70°F
SW
4 mph
4 mph
1500
72°F
NW
2 mph
2 mph
1800
66°F
S
2 mph
2 mph
2100
55°F
SW
6 mph
6 mph
May 21, thursday
0000
52°F
S
6 mph
6 mph
