San Onofre Water Temperature
The water will feel medium. The water will feel a bit chilly in just bathers / swimming costume. If you plan on wearing a wetsuit 4/3mm should be thick enough.
The measurements for the water temperature in San Onofre, California are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.
Water temp by month
Monthly average max / min water temperatures
The graph below shows the range of monthly San Onofre water temperature derived from many years of historical sea surface temperature data.
The warmest water temperature is in July with an average around 67.6°F / 19.8°C. The coldest month is January with an average water temperature of 58.5°F / 14.7°C.
7 day tide forecast for San Onofre
*These tide times are estimates based on the nearest accurate location (San Clemente, California) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.