County Line/Yerba Buena Beach Water Temperature and Wetsuit Guide

The water temperature (15 °C) at County Line/Yerba Buena Beach is quite cool. If the sun does come out as forecast, it should feel warm enough to surf in a good sealed spring wetsuit. Some surfers would prefer to wear gloves and boots too. Effective windchill factor of (14 °C) will make the air and water feel about the same temperature.

Map of current United States Surface Water Temperatures based on measurements from oceanographic satellites

Map of current United States 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 County Line/Yerba Buena Beach. 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.

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.

County Line/Yerba Buena Beach sea water temperatures peak in the range 16 to 20°C (61 to 68°F) on around the 4th of September and are at their lowest on about the 26th of February, in the range 13 to 15°C (55 to 59°F). The highest County Line/Yerba Buena Beach sea water temperatures in early September require something like a 3/2mm fully sealed wetsuit. The lowest sea water temperatures at County Line/Yerba Buena Beach in the fourth week of February are ideally suited to a 4/3mm wetsuit + 3mm boots, although a 5/3mm wetsuit may be preferable for longer sessions and cold windy days.

Actual sea surface water temperatures close to shore at County Line/Yerba Buena Beach 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 County Line/Yerba Buena Beach. Refer to our detailed weather forecasts for this information.