Current Sea Water Temperature:
+64.0°F
| Maximum Sea Water Temperature in May: | 74.0°F |
| Minimum Sea Water Temperature in May: | 57.0°F |
| Average water temperature in May: | 63.8°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| May 10 | 64.0°F | May 05 | 62.2°F |
| May 09 | 63.4°F | May 04 | 61.4°F |
| May 08 | 61.8°F | May 03 | 60.4°F |
| May 07 | 61.6°F | May 02 | 60.8°F |
| May 06 | 61.8°F | May 01 | 59.4°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 2025 for Rijeka was 76.3°F. The maximum and minimum values were 74.2°F and 79.0°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Rijeka was 78.8°F. The maximum and minimum values were 77.0°F and 80.4°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°
| Brela |  |
+64 |
| Dubrovnik | |
+66 |
| Hvar |  |
+64 |
| Istria | |
+64 |
| Klek |  |
+68 |
| Makarska | |
+64 |
| Omis |  |
+64 |
| Porec | |
+62 |
| Pula | |
+62 |
| Rijeka | |
+62 |
| Rovinj | |
+64 |
| Split |  |
+68 |
| Trogir | |
+66 |
| Zadar | |
+66 |
| Zagreb | |
+70 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Rijeka
Local time: 18:30
10 may, sunday
| 2100 |  |
56°F | N 1 mph |
11 may, monday
| 0000 |  |
56°F | N 4 mph |
| 0300 |  |
58°F | N 4 mph |
| 0600 | |
58°F | N 7 mph |
| 0900 | |
58°F | N 11 mph |
| 1200 | |
60°F | N 12 mph |
| 1500 | |
62°F | NE 12 mph |
| 1800 | |
58°F | N 12 mph |