Water temperature in Ostia

This data the coastal Ostia sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in Ostia

Water temperature in Ostia today is 25°C. Based on our historical data over a period of ten years, the warmest water in this day in the Tyrrhenian Sea near Ostia was recorded in 2024 and was 27.2°C, and the coldest was recorded in 2007 at 23°C. Sea water temperature in Ostia is expected to drop to 24.3°C in the next 10 days. September average water temperature in Ostia is 24.3°C, the minimum temperature is 21.6°C, and the maximum is 27.8°C.

The swimming season in Ostia lasts from June to October. During those months, Ostia water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Ostia in winter reaches 15.3°C, in spring 16.2°C, in summer the average temperature rises to 24.7°C, and in autumn it is 21.7°C.

Ostia water temperature now

The sea salinity in Ostia is 37.91‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Ostia for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Ostia. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Ostia. Data in table shown for 6 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Ostia

Ostia weather forecast

Current temperature and weather

Data in a table show Ostia temperature today (6 September 2025). For more information and forecast for a few days, go to the weather forecast Ostia.

0-3 h	3-6 h	6-9 h	9-12 h
22.9°C	22.4°C	21.4°C	24.9°C

12-15 h	15-18 h	18-21 h	21-24 h
26.6°C	26°C	24.9°C	23.5°C

Ostia water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Ostia. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Ostia on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Ostia

The nearest beaches and cities from Ostia with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Lido di Ostia	25°C	26°C		0.35 m
Fiumicino	25.1°C	26°C		0.35 m
Rome	25.1°C	26°C		0.35 m
Focene	25.2°C	26°C		0.34 m
Lido di Castel Fusano	24.9°C	26°C		0.34 m
Fregenae	25.3°C	26°C		0.33 m
Bocca di Leone A Mare	25.3°C	26°C		0.33 m
Passo Oscuro	25.3°C	26°C		0.33 m
Torvaianica	24.7°C	27°C		0.36 m
Campo Ascolano	24.7°C	27°C		0.36 m

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Ostia Lido, Lido di Roma, Lido di Ostia

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Our report for Ostia is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.