Current Sea Water Temperature:
+78.8°F
| Maximum Sea Water Temperature in September: | 83.8°F |
| Minimum Sea Water Temperature in September: | 70.8°F |
| Average water temperature in September: | 76.4°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| September 17 | 78.8°F | September 12 | 80.8°F |
| September 16 | 78.6°F | September 11 | 82.0°F |
| September 15 | 79.6°F | September 10 | 82.0°F |
| September 14 | 80.0°F | September 09 | 82.8°F |
| September 13 | 80.4°F | September 08 | 82.4°F |
When is the Warmest Sea for Istria?
According to our data for the last three years for Istria 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 Istria was 83.9°F. The maximum and minimum values were 82.2°F and 86.0°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Istria was 82.2°F. The maximum and minimum values were 80.4°F and 85.6°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2026 for Istria was 81.7°F. The maximum and minimum values were 78.6°F and 83.8°F respectively.
Croatia Resorts:
NAME
F°
| Baska Voda |  |
+74 |
| Brela | |
+74 |
| Crikvenica |  |
+64 |
| Dubrovnik | |
+74 |
| Istria | |
+76 |
| Klek | |
+80 |
| Makarska | |
+66 |
| Omis | |
+76 |
| Porec | |
+76 |
| Pula | |
+72 |
| Rovinj | |
+68 |
| Split | |
+76 |
| Tucepi | |
+66 |
| Zadar |  |
+78 |
| Zagreb | |
+66 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Istria
Local time: 17:25
17 sep, thursday
| 1800 |  |
76°F | NW 11 mph |
| 2100 | |
72°F | NW 14 mph |
18 sep, friday
| 0000 |  |
68°F | NW 13 mph |
| 0300 | |
68°F | SW 4 mph |
| 0600 |  |
68°F | W 7 mph |
| 0900 |  |
70°F | W 7 mph |
| 1200 | |
74°F | N 1 mph |
| 1500 | |
74°F | SE 2 mph |