World Resorts Croatia Opatija Weather

Opatija 14 Days Forecast

20.09
sun
Day
73°F
NE 4 mph
Precip.
3%
Night
70°F
SW 4 mph
Precip.
21%
21.09
mon
Day
72°F
SW 8 mph
Precip.
13%
Night
63°F
SW 12 mph
Precip.
3%
22.09
tue
Day
68°F
SW 6 mph
Precip.
1%
Night
59°F
SW 11 mph
Precip.
3%
23.09
wed
Day
68°F
S 1 mph
Precip.
1%
Night
61°F
SW 7 mph
Precip.
4%
24.09
thu
Day
66°F
NE 3 mph
Precip.
11%
Night
61°F
SW 4 mph
Precip.
36%
25.09
fri
Day
55°F
SW 18 mph
Precip.
28%
Night
54°F
SW 13 mph
Precip.
5%
26.09
sat
Day
63°F
SW 5 mph
Precip.
1%
Night
63°F
SW 11 mph
Precip.
3%
27.09
sun
Day
64°F
NE 2 mph
Precip.
2%
Night
63°F
SW 7 mph
Precip.
4%
28.09
mon
Day
72°F
NW 4 mph
Precip.
1%
Night
63°F
SW 8 mph
Precip.
3%
29.09
tue
Day
72°F
E 2 mph
Precip.
4%
Night
64°F
SW 7 mph
Precip.
3%
30.09
wed
Day
73°F
NW 2 mph
Precip.
7%
Night
64°F
SW 9 mph
Precip.
5%
01.10
thu
Day
73°F
NW 3 mph
Precip.
1%
Night
64°F
SW 8 mph
Precip.
3%
02.10
fri
Day
72°F
E 2 mph
Precip.
2%
Night
64°F
SW 6 mph
Precip.
2%
03.10
sat
Day
70°F
NE 3 mph
Precip.
4%
Night
68°F
SW 5 mph
Precip.
12%

Sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 76.4°F. The highest and lowest sea temperatures during the month were 78.4°F and 73.2°F.

Sea water temperature in October, °F

Show year:
2025
2024
2023

The average sea water temperature in October of 2025 was 66.0°F. The highest and lowest sea temperatures during the month were 71.2°F and 62.8°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

Sunniest months:
August 23 days
July 21 days
June 19 days
Warmest months:
August 80.1 °F
July 79.7 °F
June 75.7 °F
Warmest sea temp:
August 76.2 °F
July 75.8 °F
September 71.3 °F
Coldest months:
January 42.3 °F
February 44.2 °F
December 45.0 °F
Rainiest months:
May 7 days
November 6 days
July 6 days
Windiest months:
February 8.3 mph
March 7.9 mph
November 7.8 mph

Opatija on a weather map

Current weather
04:04
Opatija
+66°F
SW 6 mph
Feels like: +66°F
Precip.: 15%
Places in Croatia:
Name
°F
Baska Voda
+70°F
Brela
+70°F
Dubrovnik
+68°F
Zagreb
+64°F
Zadar
+72°F
Istria
+70°F
Klek
+64°F
Makarska
+59°F
Omis
+68°F
Porec
+70°F
Pula
+66°F
Rovinj
+68°F
Split
+68°F
Tucepi
+59°F
Crikvenica
+66°F
all places
24 Hours Forecast
Opatija
Local time: 04:04
September 20, sunday
0600
66°F
SW
6 mph
0900
68°F
SW
4 mph
1200
73°F
NE
4 mph
1500
72°F
NE
2 mph
1800
72°F
SW
2 mph
2100
70°F
SW
4 mph
September 21, monday
0000
70°F
SW
4 mph
0300
70°F
SW
4 mph
Units of measurement: °C / °F