San Onofre water temperature
San Onofre ratings
Quality on a good day: 3.8
Consistency of Surf: 4.3
Difficulty Level: 2.0
Wind and Kite Surfing: 2.0
Crowds: 2.7

See all 18 ratings

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San Onofre Water Temperature and Wetsuit Guide

(Orange County, USA)

Today's San Onofre sea temperature is 22.8 °C.

Statistics for 17 Sep (1981–2005) – mean: 19.5 °C, range: 18.1 °C to 21.7 °C

A hot sunny day, feeling like 31 °C even after we account for wind, and warm water temperature (22 °C) too at San Onofre. Surfers may need a thin summer wetsuit or at least a rash vest to block the UV. Otherwise, warm enough for just board shorts.

United States Sea Water Temperature

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

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 San Onofre. 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.

San Onofre 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.

San Onofre sea water temperatures peak in the range 18 to 22°C (64 to 72°F) on around the 6th of September and are at their coldest on about the 5th of February, in the range 13 to 16°C (55 to 61°F). The warmest San Onofre sea water temperatures in the first week of September require something like a 3/2mm fully sealed wetsuit. The coldest sea water temperatures at San Onofre at the beginning 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 San Onofre 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 San Onofre. Refer to our detailed weather forecasts for this information.

 

 

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