Water temperature in Syros

This data the coastal Syros 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 Syros

Water temperature in Syros today is 23.9°C. Based on our historical data over a period of ten years, the warmest water in this day in Syros was recorded in 2024 and was 24.8°C, and the coldest was recorded in 2007 at 22°C. Sea water temperature in Syros is expected to drop to 22.7°C in the next 10 days. September average water temperature in Syros is 24.2°C, the minimum temperature is 21.5°C, and the maximum is 26.8°C.

The swimming season in Syros lasts from June to November. During those months, Syros water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Syros in winter reaches 16.5°C, in spring 17.1°C, in summer the average temperature rises to 24°C, and in autumn it is 21.8°C.

Syros water temperature now

The sea salinity in Syros is 38.98‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Syros 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 Syros. 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 Syros. Data in table shown for 26 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Syros

Syros weather forecast

Current temperature and weather

Data in a table show Syros temperature today (26 September 2025). For more information and forecast for a few days, go to the weather forecast Syros.

0-3 h	3-6 h	6-9 h	9-12 h
21.7°C	20.6°C	20.3°C	20.7°C

12-15 h	15-18 h	18-21 h	21-24 h
21.3°C	21.4°C	21.1°C	20.9°C

Syros water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Syros. 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 Syros 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 Syros

The nearest beaches and cities from Syros 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
Ermoupoli	23.9°C	21°C		1.63 m
Galissas	24°C	21°C		1.71 m
Tinos	23.6°C	21°C		1.58 m
Agios Stefanos	23.2°C	21°C		1.58 m
Platis Yalos	23.2°C	21°C		1.58 m
Elia Beach	23.2°C	21°C		1.58 m
Naoussa	23.2°C	23°C		1.33 m
Parikia	23.3°C	23°C		1.57 m
Agia Anna Beach	23.2°C	21°C		1.61 m
Kalafati	23.2°C	21°C		1.61 m

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Siros, Syra

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Our report for Syros 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.