Temperatures at California Beaches in September
Typical temperatures for beaches along the Pacific Ocean in California during the month of September are listed below. The tables give monthly averages of daily maximum and minimum air temperatures for each location and, where available, the month's average ocean temperature.
For many beaches, September brings the warmest weather of the year. This month has the hottest days for much of the central California coast.
In northern California, Shelter Cove achieves the region's highest temperatures all year, with average daily maximums of 69 degrees Fahrenheit (21 degrees Celsius).
Southern California Coast
|75||62||Santa Catalina Island||69|
Los Angeles Area
Central California Coast
|77||50||Big Sur State Park||–|
San Francisco Area
|66||50||Half Moon Bay||–|
|64||55||San Francisco, Fort Funston||60|
Northern California Coast
|68||49||Fort Ross State Park||54|
The high and low air temperatures are normals for the years 1981 to 2010. Temperatures for the two places without climate normals, Anacapa Island and Avila Beach, are instead averages for the years that weather data were collected. Ocean temperatures are also averages of all the years with measurements.
Often the location of stations that measure weather and those that measure ocean water temperature don't match. For beaches with climate but no ocean data, a nearby location, where available, is used here. So the ocean temperature listed for San Diego is from La Jolla. Other substitutions are Los Angeles for Long Beach, Port Hueneme for Oxnard, Pacific Grove for Monterey, Fort Point for San Francisco, Trinidad for Eureka, and Mendocino for Fort Bragg.
National Climatic Data Center. NOAA's 1981-2010 Climate Normals.
NOAA National Oceanographic Data Center. NODC Coastal Water Temperature Guide (CWTG).
Western Regional Climate Center. Comparative Data for the Western States.