World Resorts Croatia Istria Weather

Istria sea water temperature

Current sea water temperature:
+54.3°F
Minimum sea water temperature in March: 56.1°F
Maximum sea water temperature in March: 47.1°F
Average sea water temperature in March: 51.5°F

Sea water temperature for the last 10 days:

March 16 54.3°F March 11 53.4°F
March 15 54.1°F March 10 53.1°F
March 14 54.0°F March 9 53.2°F
March 13 53.4°F March 8 52.9°F
March 12 53.2°F March 7 52.9°F

When is the warmest sea in Istria?

Based on the data about daily sea water temperature for the last three years the warmest sea in Istria was noticed in August, July and September.

Monthly Sea Temperatures in Istria, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 76.5°F. The highest and lowest sea temperatures during the month were 78.4°F and 75.0°F.

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 77.9°F. The highest and lowest sea temperatures during the month were 80.1°F and 76.1°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 74.8°F. The highest and lowest sea temperatures during the month were 76.5°F and 72.7°F.

Best time for vacation in Istria

Sunniest months:
July 24 days
August 24 days
June 22 days
Warmest months:
August 82.1 °F
July 81.3 °F
June 76.5 °F
Warmest sea temp:
August 78.1 °F
July 77.5 °F
September 73.6 °F
Coldest months:
January 47.5 °F
February 49.2 °F
December 50.5 °F
Rainiest months:
November 6 days
September 6 days
May 6 days
Windiest months:
February 8.2 mph
November 8.1 mph
March 8.0 mph

Istria on a weather map

Istria
+46°F
SW 6 mph
Feels like: +43°F
Precip.: 0%
Places in Croatia:
Name
°F
+54°F
+54°F
+55°F
+45°F
+50°F
+46°F
+41°F
+48°F
+46°F
+48°F
+45°F
+48°F
+48°F
+52°F
+55°F
24 Hours Forecast
Istria
Local time: 05:33
March 17, tuesday
0600
46°F
SW
6 mph
0900
50°F
SW
6 mph
1200
54°F
N
2 mph
1500
55°F
E
6 mph
1800
52°F
N
6 mph
2100
50°F
W
6 mph
March 18, wednesday
0000
48°F
SW
7 mph
0300
46°F
SW
6 mph

Best place for vacation:

Units of measurement: °C / °F