Water temperature in Les Mathes

This data the coastal Les Mathes 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 Les Mathes

Water temperature in Les Mathes today is 20.7°C. Based on our historical data over a period of ten years, the warmest water in this day in the Bay of Biscay near Les Mathes was recorded in 2022 and was 22.5°C, and the coldest was recorded in 2007 at 18.4°C. Sea water temperature in Les Mathes is expected to drop to 19.4°C in the next 10 days. September average water temperature in Les Mathes is 19.3°C, the minimum temperature is 16.5°C, and the maximum is 23.2°C.

The swimming season in Les Mathes lasts from July to September. During those months, Les Mathes water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Les Mathes in winter reaches 10.4°C, in spring 12.9°C, in summer the average temperature rises to 19.7°C, and in autumn it is 16.9°C.

Les Mathes water temperature now

The sea salinity in Les Mathes is 27.91‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Les Mathes 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 Les Mathes. 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 Les Mathes. 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 Les Mathes

Les Mathes weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
18°C	17.6°C	17°C	18°C

12-15 h	15-18 h	18-21 h	21-24 h
20°C	21.3°C	21.4°C	19.3°C

Les Mathes water temperature by month

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

The nearest beaches and cities from Les Mathes 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
Phare de La Coubre	20.7°C	27°C		0.68 m
La Grande Cote	21°C	27°C		0.56 m
Le Grand-Village-Plage	20.3°C	23°C		0.54 m
Saint-Trojan-les-Bains	20.3°C	23°C		0.54 m
Le Verdon-sur-Mer	21.3°C	27°C		0.38 m
Bourcefranc Le Chapus	20.2°C	23°C		0.54 m
Le Chateau-d'Oleron	20.2°C	23°C		0.54 m
La Cotiniere	20.8°C	23°C		0.96 m
Talmont sur Gironde	21.4°C	32°C		0.38 m
Grayan-et-l'Hopital	21.4°C	27°C		0.72 m

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Our report for Les Mathes 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.