Measurements:
°C
°F
CURRENT WEATHER
04:09
Ostia
78°F
E 8 mph
Feels like: 82°F
Precip: 10%
World Resorts Italy Ostia Weather

7 Day Weather Forecast

09.12
sat
DAY
80°F
NE 6 mph
precip
3%
NIGHT
80°F
SE 4 mph
precip
4%
09.13
sun
DAY
82°F
NE 2 mph
precip
2%
NIGHT
80°F
SE 6 mph
precip
4%
09.14
mon
DAY
82°F
N 2 mph
precip
11%
NIGHT
80°F
SE 3 mph
precip
3%
09.15
tue
DAY
82°F
N 5 mph
precip
2%
NIGHT
80°F
SE 7 mph
precip
4%
09.16
wed
DAY
80°F
NE 6 mph
precip
2%
NIGHT
80°F
SE 3 mph
precip
4%
09.17
thu
DAY
82°F
N 9 mph
precip
4%
NIGHT
76°F
NE 12 mph
precip
67%
09.18
fri
DAY
76°F
NE 8 mph
precip
57%
NIGHT
76°F
NE 9 mph
precip
58%

Ostia Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Ostia was 24.9°F. The maximum and minimum values were 23.7°F and 25.5°F respectively.

Ostia on the Weather Map

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 79.0 °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
more details