La Cosa Surf Break

Lat Long: 20.22° S 70.16° W

La Cosa Sea Temperature and Wetsuit Guide

Issued: 7 pm 24 Aug 2026 (local time)

Forecast update in  hr  min

Today's La Cosa sea temperature is
18.5°C
1.9° 

La Cosa surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's La Cosa sea temperature is 18.5 °C

(1.9° warmer than normal for this time of year)

Mean: 16.6 °C
Range: 15.5 °C to 19.3 °C
Statistics for 24 Aug (1981–2005)

    Today, many surfers would wear a spring wetsuit.

    Sunny with pleasantly warm air temperatures (feeling like 21 °C once we account for wind), yet at 18 °C the sea remains several degrees colder than the air at La Cosa. The majority of surfers will need a spring wetsuit though a summer suit or even a shorty may suffice for a short session.

    Chile Sea Water Temperature

    Map of current Chile
    Surface Water Temperatures

    (based on measurements from oceanographic satellites)
    Chile Water Temperature Anomaly

    Map of current Chile
    Sea Water Temperature Anomalies

    (compared with long term averages
    at this time of year)

    click thumbnails to expand

    Below is a graph of Historical Sea Surface Temperature for La Cosa. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.

    La Cosa Water Temperature Graph

    All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.

    Actual sea surface water temperatures close to shore at La Cosa can vary by several degrees compared with these open water averages. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at La Cosa. Refer to our detailed weather forecasts for this information.

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