Beach
Moonstone Beach
San Luis Obispo County, 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
beach in San Luis Obispo county, CA
Wikipedia has no article about this beach yet. It is on the atlas from its Wikidata record and its photograph.
Questions
How warm is the sea at Moonstone Beach?
The sea off Moonstone 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 Moonstone 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 Moonstone Beach?
Moonstone Beach is on the coast of San Luis Obispo County, United States, at 35.5750, -121.1139. The map on this site flies straight to it.
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