Water temperature in Locoal Mendon

This data the coastal Locoal Mendon 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 Locoal Mendon

Water temperature in Locoal Mendon today is 17.2°C. Based on our historical data over a period of ten years, the warmest water in this day in Locoal Mendon was recorded in 2023 and was 19°C, and the coldest was recorded in 2013 at 16°C. Sea water temperature in Locoal Mendon is expected to drop to 16.4°C in the next 10 days. September average water temperature in Locoal Mendon is 17.5°C, the minimum temperature is 15.2°C, and the maximum is 20.5°C.

Throughout the year, the water temperature in Locoal Mendon does not rise above 20°C and therefore is not suitable for comfortable swimming. But on some days of June, July, August, September, the water temperature warms up to 20°C and above. The average water temperature in Locoal Mendon in winter reaches 9.8°C, in spring 12°C, in summer the average temperature rises to 17.7°C, and in autumn it is 15.5°C.

Locoal Mendon water temperature now

The sea salinity in Locoal Mendon is 34.21‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Locoal Mendon 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 Locoal Mendon. 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 Locoal Mendon. 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 Locoal Mendon

Locoal Mendon weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
10.7°C	10°C	9.7°C	12.9°C

12-15 h	15-18 h	18-21 h	21-24 h
16.3°C	17.6°C	16°C	13.1°C

Locoal Mendon water temperature by month

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

The nearest beaches and cities from Locoal Mendon 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
Saint Philibert	17.1°C	18°C		0.23 m
Plouharnel	17.3°C	18°C		0.35 m
Erdeven	17.3°C	18°C		0.43 m
Arzon	17.1°C	18°C		0.17 m
Saint Pierre Quiberon	17.4°C	15°C		0.63 m
Port Navalo	17.3°C	18°C		0.38 m
Nostang	17.1°C	18°C		0.27 m
Sainte Helene	17.1°C	18°C		0.27 m
Plouhinec	17.1°C	18°C		0.27 m
Quiberon	17.5°C	15°C		0.5 m

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Our report for Locoal Mendon 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.