Current Sea Water Temperature:
+53.2°F
| Maximum Sea Water Temperature in January: | 56.8°F |
| Minimum Sea Water Temperature in January: | 48.6°F |
| Average water temperature in January: | 52.9°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| January 10 | 53.2°F | January 05 | 54.6°F |
| January 09 | 53.4°F | January 04 | 54.6°F |
| January 08 | 54.4°F | January 03 | 55.0°F |
| January 07 | 54.6°F | January 02 | 55.0°F |
| January 06 | 54.2°F | January 01 | 55.2°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 2025 for Istria was 79.4°F. The maximum and minimum values were 77.8°F and 81.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Istria was 81.0°F. The maximum and minimum values were 79.0°F and 83.4°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Istria was 77.6°F. The maximum and minimum values were 75.2°F and 79.4°F respectively.
Croatia Resorts:
NAME
F°
| Baska Voda |  |
+46 |
| Brela | |
+46 |
| Dubrovnik |  |
+46 |
| Hvar | |
+50 |
| Istria | |
+42 |
| Makarska | |
+32 |
| Opatija | |
+34 |
| Porec | |
+42 |
| Pula | |
+42 |
| Rijeka | |
+34 |
| Rovinj | |
+42 |
| Split | |
+38 |
| Trogir | |
+42 |
| Zadar |  |
+44 |
| Zagreb |  |
+30 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Istria
Local time: 21:33
11 jan, sunday
| 0000 |  |
40°F | SW 4 mph |
| 0300 |  |
42°F | S 5 mph |
| 0600 | |
40°F | SW 6 mph |
| 0900 |  |
38°F | NW 8 mph |
| 1200 | |
42°F | SW 4 mph |
| 1500 |  |
42°F | S 6 mph |
| 1800 |  |
36°F | SW 5 mph |
| 2100 | |
36°F | W 5 mph |