Measurements:
°C
°F
CURRENT WEATHER
18:16
Opatija
68°F
SW 9 mph
Feels like: 68°F
Precip: 18%
World Resorts Croatia Opatija Weather

7 Day Weather Forecast

09.11
fri
DAY
64°F
SW 7 mph
precip
48%
NIGHT
62°F
SW 9 mph
precip
24%
09.12
sat
DAY
74°F
SW 12 mph
precip
1%
NIGHT
66°F
SW 9 mph
precip
4%
09.13
sun
DAY
78°F
S 3 mph
precip
1%
NIGHT
68°F
SW 6 mph
precip
14%
09.14
mon
DAY
74°F
SW 8 mph
precip
12%
NIGHT
68°F
SW 9 mph
precip
6%
09.15
tue
DAY
78°F
E 3 mph
precip
3%
NIGHT
70°F
SW 6 mph
precip
4%
09.16
wed
DAY
74°F
NE 4 mph
precip
2%
NIGHT
68°F
SW 6 mph
precip
3%
09.17
thu
DAY
76°F
NE 3 mph
precip
3%
NIGHT
72°F
S 4 mph
precip
12%

Opatija Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Opatija was 22.4°F. The maximum and minimum values were 21.6°F and 23.1°F respectively.

Opatija on the Weather Map

Best Time to Visit Opatija
The most sunny months:
August 23 days
July 21 days
June 19 days
The most warm months:
August 83.4 °F
July 83.0 °F
June 78.5 °F
Warmest sea temperature:
August 79.1 °F
July 78.6 °F
September 73.7 °F
The most cold months:
January 41.4 °F
February 43.6 °F
December 44.5 °F
The most rainy months:
May 7 days
November 6 days
July 6 days
The most windy months:
February 8 mph
March 7 mph
November 7 mph
more details