Current Sea Water Temperature:
+82.2°F
| Maximum Sea Water Temperature in August: | 84.8°F |
| Minimum Sea Water Temperature in August: | 73.2°F |
| Average water temperature in August: | 78.9°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| August 02 | 82.2°F | July 28 | 78.4°F |
| August 01 | 81.0°F | July 27 | 78.4°F |
| July 31 | 80.4°F | July 26 | 79.8°F |
| July 30 | 79.2°F | July 25 | 80.2°F |
| July 29 | 78.4°F | July 24 | 80.2°F |
When is the Warmest Sea for Opatija?
According to our data for the last three years for Opatija the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Opatija was 76.4°F. The maximum and minimum values were 74.2°F and 80.0°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Opatija was 79.9°F. The maximum and minimum values were 77.8°F and 83.2°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Opatija was 74.9°F. The maximum and minimum values were 73.2°F and 76.2°F respectively.
Croatia Resorts:
NAME
F°
| Baska Voda |  |
+82 |
| Brela | |
+84 |
| Crikvenica | |
+86 |
| Dubrovnik | |
+88 |
| Klek | |
+92 |
| Makarska | |
+90 |
| Omis | |
+92 |
| Porec | |
+88 |
| Pula | |
+88 |
| Rijeka | |
+84 |
| Rovinj | |
+88 |
| Split | |
+92 |
| Tucepi | |
+90 |
| Zadar | |
+88 |
| Zagreb | |
+84 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Opatija
Local time: 10:15
02 aug, sunday
| 1200 |  |
94°F | SW 7 mph |
| 1500 | |
96°F | W 9 mph |
| 1800 | |
90°F | W 4 mph |
| 2100 |  |
76°F | SW 8 mph |
03 aug, monday
| 0000 | |
74°F | S 5 mph |
| 0300 | |
72°F | S 5 mph |
| 0600 | |
72°F | SW 6 mph |
| 0900 | |
88°F | NW 2 mph |