Water temperature in Arcachon

This data the coastal Arcachon 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 Arcachon

Water temperature in Arcachon today is 19.6°C. Based on our historical data over a period of ten years, the warmest water in this day in Arcachon was recorded in 2011 and was 20.3°C, and the coldest was recorded in 2007 at 18.3°C. Sea water temperature in Arcachon is expected to drop to 18.9°C in the next 10 days. September average water temperature in Arcachon is 20.2°C, the minimum temperature is 17.7°C, and the maximum is 24°C.

The swimming season in Arcachon lasts from July to September. During those months, Arcachon water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Arcachon in winter reaches 11.7°C, in spring 13.6°C, in summer the average temperature rises to 20.4°C, and in autumn it is 17.8°C.

Arcachon water temperature now

The sea salinity in Arcachon is 32.80‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Arcachon 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 Arcachon. 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 Arcachon. 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 Arcachon

Arcachon weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
11.6°C	11.3°C	10.8°C	13.7°C

12-15 h	15-18 h	18-21 h	21-24 h
17.5°C	18°C	16.6°C	14.2°C

Arcachon water temperature by month

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

The nearest beaches and cities from Arcachon 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
Le Moulleau	19.6°C	18°C		0.65 m
Gujan-Mestras	19.6°C	18°C		0.65 m
Audenge	19.6°C	18°C		0.65 m
Andernos-les-Bains	19.5°C	18°C		0.65 m
Lanton	19.5°C	18°C		0.65 m
Cape Ferret	19.9°C	18°C		0.7 m
Plage du Grand Crohot	19.5°C	18°C		0.7 m
La Teste-de-Buch	20.2°C	18°C		0.73 m
Pyla sur Mer	20.2°C	18°C		0.73 m
Dune du Pilat	20.2°C	18°C		0.73 m

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Our report for Arcachon 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.