Water temperature in Marennes

This data the coastal Marennes 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 Marennes

Water temperature in Marennes today is 14.9°C. Based on our historical data over a period of ten years, the warmest water in this day in Marennes was recorded in 2024 and was 15.9°C, and the coldest was recorded in 2018 at 13.2°C. Sea water temperature in Marennes is expected to drop to 13.7°C in the next 10 days. November average water temperature in Marennes is 13.8°C, the minimum temperature is 10.9°C, and the maximum is 17.2°C.

The swimming season in Marennes lasts from July to September. During those months, Marennes water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Marennes in winter reaches 10°C, in spring 12.9°C, in summer the average temperature rises to 19.8°C, and in autumn it is 16.7°C.

Marennes water temperature now

Surf Forecast in Marennes 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 Marennes. 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 Marennes. Data in table shown for 6 November 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Marennes

Marennes weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
16.9°C	15.9°C	15.5°C	16.1°C

12-15 h	15-18 h	18-21 h	21-24 h
16°C	15.5°C	15.6°C	15.4°C

Marennes water temperature by month

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

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Our report for Marennes 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.