Finding data on water temps below 0.6 meters is challenging.
The below sites are on different topics but of value for SD.
http://sdcoos.ucsd.edu/data/current_data_SIO.cfm
http://sdcoos.ucsd.edu/data/CurrentsList.cfm
The below sites are on different topics but of value for SD.
http://sdcoos.ucsd.edu/data/current_data_SIO.cfm
http://sdcoos.ucsd.edu/data/CurrentsList.cfm