Temperatures at California Beaches in September

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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.

You can jump to a separate table for each region of the state: Southern Coast, Los Angeles Area, Central Coast, San Francisco Area and Northern Coast.

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

Average temperatures in °F for September
High Low Place Ocean
76 62 Imperial Beach   –
80 59 Laguna Beach   –
72 64 Newport Beach 69
71 62 Oceanside 67
76 65 San Diego 66
75 62 Santa Catalina Island 69

Los Angeles Area

Average temperatures in °F for September
High Low Place Ocean
71 59 Anacapa Island 65
82 63 Long Beach 67
74 59 Oxnard 62
71 63 Santa Monica 67

Central California Coast

Average temperatures in °F for September
High Low Place Ocean
77 54 Avila Beach 60
77 50 Big Sur State Park   –
74 55 Lompoc   –
67 53 Monterey 58
71 55 Morro Bay 58
68 54 Pismo Beach   –
74 54 Salinas   –
75 60 Santa Barbara 64

San Francisco Area

Average temperatures in °F for September
High Low Place Ocean
64 51 Bodega Bay 55
66 50 Half Moon Bay   –
72 56 Pacifica   –
64 55 San Francisco, Fort Funston 60
71 48 San Gregorio   –
76 53 Santa Cruz 60

Northern California Coast

Average temperatures in °F for September
High Low Place Ocean
62 49 Crescent City 57
64 50 Eureka 55
64 49 Fort Bragg 53
68 49 Fort Ross State Park 54
65 47 Klamath   –
69 53 Shelter Cove   –

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.

References

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.

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