Beach
Cayucos State Beach
California, United States · sea 15.5 °C at its warmest, in September

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020.
About
Cayucos State Beach is a protected beach in the state park system of California, United States. It is located in Cayucos, San Luis Obispo County.
Questions
How warm is the sea at Cayucos State Beach?
The sea off Cayucos State Beach averages 15.5 °C at its warmest, in September, and 12.2 °C at its coolest. These are monthly means from NOAA's OISST v2.1 satellite and buoy record for 1991 to 2020, sampled at the beach's own coordinates.
When can you swim at Cayucos State Beach?
The sea here never averages 20 °C in any month, so swimming means cold water all year. Some people do it anyway.
Where is Cayucos State Beach?
Cayucos State Beach is on the coast of California, United States, at 35.4486, -120.9060. The map on this site flies straight to it.
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