World Resorts Italy Ostia Weather

Ostia sea water temperature

Current sea water temperature:
+84.9°F
Minimum sea water temperature in August: 84.9°F
Maximum sea water temperature in August: 73.8°F
Average sea water temperature in August: 79.1°F

Sea water temperature for the last 10 days:

August 5 84.9°F July 31 83.5°F
August 4 83.8°F July 30 83.5°F
August 3 83.8°F July 29 82.9°F
August 2 83.8°F July 28 82.6°F
August 1 83.5°F July 27 81.9°F

When is the warmest sea in Ostia?

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

Monthly Sea Temperatures in Ostia, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 77.9°F. The highest and lowest sea temperatures during the month were 80.2°F and 73.8°F.

Sea water temperature in July, °F

Show year:
2026
2025
2024

The average sea water temperature in July of 2026 was 81.6°F. The highest and lowest sea temperatures during the month were 85.1°F and 76.5°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 76.8°F. The highest and lowest sea temperatures during the month were 77.9°F and 74.7°F.

Best time for vacation in Ostia

Sunniest months:
July 29 days
August 28 days
June 26 days
Warmest months:
August 86.2 °F
July 85.5 °F
June 79.8 °F
Warmest sea temp:
August 79.1 °F
July 78.1 °F
September 76.1 °F
Coldest months:
January 54.7 °F
February 55.9 °F
December 57.3 °F
Rainiest months:
November 6 days
December 4 days
January 4 days
Windiest months:
February 9.8 mph
November 9.7 mph
January 9.7 mph

Ostia on a weather map

Ostia
+86°F
NE 10 mph
Feels like: +93°F
Precip.: 3%
Places in Italy:
Name
°F
+99°F
+90°F
+102°F
+91°F
+88°F
+90°F
+91°F
+95°F
+90°F
+84°F
+97°F
+81°F
+90°F
+104°F
24 Hours Forecast
Ostia
Local time: 15:34
August 05, wednesday
1800
86°F
N
3 mph
2100
82°F
SW
7 mph
August 06, thursday
0000
81°F
SW
6 mph
0300
79°F
SW
6 mph
0600
77°F
SW
7 mph
0900
84°F
S
4 mph
1200
88°F
E
9 mph
1500
88°F
E
12 mph
Units of measurement: °C / °F