Measurements:
°C
°F
Ostia
72°F
SW 6 mph
Feels like: 72°F
Precip: 22%
World Resorts Italy Ostia Weather

Ostia Sea Water Temperature

Current Sea Water Temperature:
+80.0°F
Maximum Sea Water Temperature in October: 80.4°F
Minimum Sea Water Temperature in October: 68.8°F
Average water temperature in October: 73.9°F

Sea Water Temperature for the Last 10 Days:

October 03 80.0°F September 28 80.4°F
October 02 80.2°F September 27 80.6°F
October 01 80.4°F September 26 80.8°F
September 30 80.4°F September 25 81.2°F
September 29 80.6°F September 24 81.2°F

When is the Warmest Sea for Ostia?

According to our data for the last three years for Ostia the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Ostia was 87.9°F. The maximum and minimum values were 86.8°F and 89.2°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Ostia was 85.1°F. The maximum and minimum values were 79.4°F and 89.0°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Ostia was 83.2°F. The maximum and minimum values were 80.4°F and 87.2°F respectively.

Best Time to Visit Ostia
The most sunny months:
July 29 days
August 28 days
June 26 days
The most warm months:
August 90.2 °F
July 89.4 °F
June 83.1 °F
Warmest sea temperature:
August 82.7 °F
July 81.2 °F
September 79.3 °F
The most cold months:
January 55.2 °F
February 56.5 °F
December 58.1 °F
The most rainy months:
November 6 days
December 4 days
January 4 days
The most windy months:
February 9 mph
November 9 mph
January 9 mph

Ostia on the Weather Map

Italy Resorts:
NAME
F°
Amalfi +62
Bari +72
Bibione +54
Catania +68
Florence +64
Genoa +50
Lido di Jesolo +58
Naples +72
Palermo +58
Rimini +58
Rome +64
Scalea +48
Sicily +64
Tropea +68
Venice +58
24 Hours Weather Forecast
Ostia
Local time: 04:56
04 oct, sunday
0600 72°F
SW
6 mph
0900 72°F
SW
6 mph
1200 76°F
NE
4 mph
1500 78°F
NE
10 mph
1800 78°F
E
9 mph
2100 78°F
E
4 mph
05 oct, monday
0000 76°F
SE
2 mph
0300 72°F
SW
6 mph