Current Sea Water Temperature:
+80.8°F
| Maximum Sea Water Temperature in August: | 85.2°F |
| Minimum Sea Water Temperature in August: | 73.0°F |
| Average water temperature in August: | 79.1°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| August 22 | 80.8°F | August 17 | 81.2°F |
| August 21 | 81.6°F | August 16 | 81.0°F |
| August 20 | 81.8°F | August 15 | 81.8°F |
| August 19 | 80.4°F | August 14 | 82.2°F |
| August 18 | 80.8°F | August 13 | 82.6°F |
When is the Warmest Sea for Rijeka?
According to our data for the last three years for Rijeka 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 2026 for Rijeka was 82.4°F. The maximum and minimum values were 80.4°F and 84.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Rijeka was 80.3°F. The maximum and minimum values were 78.6°F and 83.6°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Rijeka was 74.8°F. The maximum and minimum values were 73.0°F and 76.4°F respectively.
Croatia Resorts:
NAME
F°
| Baska Voda |  |
+90 |
| Brela | |
+90 |
| Crikvenica |  |
+78 |
| Dubrovnik | |
+92 |
| Klek | |
+98 |
| Makarska | |
+88 |
| Omis | |
+88 |
| Porec |  |
+80 |
| Pula | |
+86 |
| Rijeka | |
+78 |
| Rovinj | |
+82 |
| Split | |
+88 |
| Tucepi | |
+88 |
| Zadar | |
+84 |
| Zagreb | |
+82 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Rijeka
Local time: 14:19
22 aug, saturday
| 1500 |  |
78°F | N 4 mph |
| 1800 |  |
80°F | S 3 mph |
| 2100 |  |
72°F | SW 11 mph |
23 aug, sunday
| 0000 | |
68°F | SW 9 mph |
| 0300 |  |
66°F | SW 9 mph |
| 0600 | |
66°F | SW 11 mph |
| 0900 |  |
72°F | SW 11 mph |
| 1200 | |
80°F | SW 6 mph |