Water temperature in Mejillones

This data the coastal Mejillones 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 Mejillones

Water temperature in Mejillones today is 15.6°C. Based on our historical data over a period of ten years, the warmest water in this day in the Pacific Ocean near Mejillones was recorded in 2023 and was 16.4°C, and the coldest was recorded in 2007 at 13.7°C. Sea water temperature in Mejillones is expected to be constant 15.6°C in the next 10 days. September average water temperature in Mejillones is 15.2°C, the minimum temperature is 13.3°C, and the maximum is 18.2°C.

The swimming season in Mejillones lasts from January to February. During those months, Mejillones water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Mejillones in winter reaches 15.6°C, in spring 16°C, in summer the average temperature rises to 19.6°C, and in autumn it is 17.7°C.

Mejillones water temperature now

The sea salinity in Mejillones is 34.66‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Mejillones 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 Mejillones. 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 Mejillones. Data in table shown for 27 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Mejillones

Mejillones weather forecast

Current temperature and weather

Data in a table show Mejillones temperature today (27 September 2025). For more information and forecast for a few days, go to the weather forecast Mejillones.

0-3 h	3-6 h	6-9 h	9-12 h
16.4°C	16°C	14.9°C	16.9°C

12-15 h	15-18 h	18-21 h	21-24 h
18.3°C	17.7°C	15.8°C	17.1°C

Mejillones water temperature by month

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

The nearest beaches and cities from Mejillones 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
Hornitos	16.9°C	18°C		1.88 m
Juan Lopez	15.2°C	19°C		2.44 m
Michilla	15.8°C	18°C		2.21 m
Atacama	16.3°C	16°C		1.73 m
Cavancha	16.3°C	16°C		1.73 m
Chanaral	14.3°C	20°C		2.38 m
Pisagua	16.5°C	16°C		1.71 m
Caldera	14.7°C	20°C		2.28 m
Bahia Inglesa	14.6°C	19°C		2.28 m
Calderilla	14.6°C	19°C		2.28 m

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Our report for Mejillones 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.