Ocean Temperatures Along the California Coast in Fall

Average water temperatures of the Pacific Ocean along the California coast during fall are listed below. 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.

Ocean temperatures continue to stay warm along the coast through September and even into October at some beaches. Indeed, a few places on the state's northern coast reach their highest temperature of the year in October.

During autumn, sea temperatures along California range from the mid 60s Fahrenheit (18 degrees Celsius) in the south to the mid 50s (12 °C) in the north. Particularly warm waters in fall occur off Catalina Island, Newport Beach and Alameda in San Francisco Bay.

Actual ocean temperatures do of course vary from year to year depending upon the weather and the flow of ocean currents.

These coastal water temperatures are averages compiled by the US National Oceanographic Data Center of the National Oceanic and Atmospheric Administration.

Southern California Coast

Average ocean water temperature in °F

Place	Sep 16-30	Oct 1-15	Oct 16-31	Nov
Balboa	65	65	63	61
Dana Point	66	65	64	61
La Jolla	66	65	63	61
Newport Beach	68	68	65	64
Oceanside	66	65	63	61
San Clemente	66	65	63	61
Santa Catalina Island	68	68	66	63

Los Angeles Area

Average ocean water temperature in °F

Place	Sep 16-30	Oct 1-15	Oct 16-31	Nov
Anacapa Island	64	64	63	61
Gaviota	63	62	62	61
Los Angeles	66	66	66	64
Point Mugu	62	62	60	60
Port Hueneme	62	62	61	60
Santa Monica	66	65	63	61
Ventura	65	65	62	60
Zuma Beach	64	64	62	61

Central California Coast

Average ocean water temperature in °F

Place	Sep 16-30	Oct 1-15	Oct 16-31	Nov
Avila Beach	60	59	59	57
Morro Bay	58	57	57	56
Pacific Grove	58	57	56	55
Point Lobos	56	55	55	55
Santa Barbara	64	64	62	60

San Francisco Area

Average ocean water temperature in °F

Place	Sep 16-30	Oct 1-15	Oct 16-31	Nov
Alameda	65	64	61	58
Bodega Bay	55	55	54	54
San Francisco, Fort Point	60	59	58	56
Santa Cruz	59	59	59	56

Northern California Coast

Average ocean water temperature in °F

Place	Sep 16-30	Oct 1-15	Oct 16-31	Nov
Crescent City	56	54	54	53
Fort Ross	54	54	54	54
Mendocino	53	54	53	53
Trinidad	54	54	54	53