Beach

Thornton State Beach

San Mateo County, United States · sea 14.6 °C at its warmest, in September

See it on the map Wikipedia Wikidata OpenStreetMap

Sea temperature month by month

11.9Jan

12Feb

12.1Mar

11.6Apr

11.8May

12.4Jun

13.6Jul

14.4Aug

14.6Sep

13.9Oct

13.1Nov

12.2Dec

Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 13 km offshore, at the nearest open water cell of a 0.25° grid.

About

Thornton State Beach is a protected beach in the state park system of California, United States. It is located on the Pacific coast of Daly City in the San Francisco Bay Area.

Questions

How warm is the sea at Thornton State Beach?

The sea off Thornton State Beach averages 14.6 °C at its warmest, in September, and 11.6 °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 Thornton 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 Thornton State Beach?

Thornton State Beach is on the coast of San Mateo County, United States, at 37.6833, -122.5000. The map on this site flies straight to it.