Swimming in California in september 2025 Sea temperature by city in september
Do you want to go to the beach in California in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in California by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in California in september 2025
Here, find the average sea temperature in California in september in several coastal cities.
67°F
min: 64°F / max: 70°F
58°F
min: 56°F / max: 59°F
67°F
min: 65°F / max: 70°F
58°F
min: 56°F / max: 60°F
Cambria
59°F
min: 55°F / max: 62°F
59°F
min: 57°F / max: 61°F
Channel Islands National Park
62°F
min: 58°F / max: 65°F
Crescent City
53°F
min: 48°F / max: 57°F
Encinitas
68°F
min: 65°F / max: 70°F
53°F
min: 49°F / max: 57°F
Gaviota
62°F
min: 59°F / max: 65°F
Golden Gate National Recreation Area
58°F
min: 56°F / max: 59°F
Gualala
56°F
min: 54°F / max: 58°F
58°F
min: 56°F / max: 59°F
67°F
min: 64°F / max: 70°F
Jenner
56°F
min: 54°F / max: 58°F
Klamath
53°F
min: 49°F / max: 57°F
66°F
min: 63°F / max: 69°F
Manhattan Beach
67°F
min: 64°F / max: 70°F
McKinleyville
53°F
min: 49°F / max: 57°F
55°F
min: 53°F / max: 57°F
59°F
min: 55°F / max: 62°F
Moss Beach
58°F
min: 56°F / max: 59°F
Newport Beach
67°F
min: 65°F / max: 70°F
58°F
min: 56°F / max: 59°F
Oceanside
68°F
min: 64°F / max: 70°F
Oxnard
64°F
min: 61°F / max: 67°F
Pacific Grove
58°F
min: 56°F / max: 60°F
Pescadero
58°F
min: 56°F / max: 59°F
59°F
min: 55°F / max: 62°F
Point Reyes
57°F
min: 56°F / max: 59°F
68°F
min: 65°F / max: 70°F
62°F
min: 59°F / max: 65°F
58°F
min: 57°F / max: 60°F
67°F
min: 64°F / max: 70°F
Sea Ranch
56°F
min: 54°F / max: 58°F
Stinson Beach
57°F
min: 56°F / max: 59°F
Timber Cove
56°F
min: 54°F / max: 57°F
Topanga
66°F
min: 63°F / max: 69°F
64°F
min: 61°F / max: 67°F
56°F
min: 54°F / max: 58°F
68°F
min: 65°F / max: 70°F
Chula Vista
67°F
min: 65°F / max: 70°F
Fort Bragg
56°F
min: 54°F / max: 57°F
67°F
min: 64°F / max: 70°F
Where should you go swimming in California in the month of september?
Swimming in California in september is cool (in the best case scenario)
In september in California swimming conditions vary by city. Details below:
Swimming in september in Los Angeles , San Diego, Encinitas, Hollywood, Malibu, Manhattan Beach, Newport Beach, Oceanside, Oxnard, San Clemente, Santa Monica, Topanga, Ventura, Carlsbad, Chula Vista and Huntington Beach is possible but the sea is generally cool. So though the sea temperature may sometimes reach 70°F, it can also go as low as 64°F. Note that the average is 67°F.
Swimming in september in Channel Islands National Park, Gaviota and Santa Barbara is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 62°F (min: 58°F/max: 65°F).
Forget about swimming in San Francisco, Big Sur, Cambria, Carmel-by-the-Sea, Crescent City, Eureka, Golden Gate National Recreation Area, Gualala, Half Moon Bay, Jenner, Klamath, McKinleyville, Mendocino, Morro Bay, Moss Beach, Oakland, Pacific Grove, Pescadero, Pismo Beach, Point Reyes, Santa Cruz California, Sea Ranch, Stinson Beach, Timber Cove, Bodega Bay and Fort Bragg in september! The water temperature is freezing, reaching as low as 56°F (and only 59°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!
Where to go swimming in California in september: the map of sea temperatures
Water temperature and seasonal norms in september
Los Angeles
September | |||
Average sea temperature | 67°F | ||
Minimum sea temperature | 64°F | ||
Maximum sea temperature | 70°F | ||
Average outside temperature | 79°F | ||
Maximum outside temperature | 86°F | ||
Minimum outside temperature | 74°F | ||
Precipitation | 0.3in | ||
Number of days of precipitation | 0 jour(s) (1%) | ||
Cloud cover | 7% | ||
Our opinion | cool swimming |
More information on swimming in Los Angeles in september
San Francisco
September | |||
Average sea temperature | 58°F | ||
Minimum sea temperature | 56°F | ||
Maximum sea temperature | 59°F | ||
Average outside temperature | 70°F | ||
Maximum outside temperature | 77°F | ||
Minimum outside temperature | 63°F | ||
Precipitation | 0.2in | ||
Number of days of precipitation | 0 jour(s) (1%) | ||
Cloud cover | 12% | ||
Our opinion | freezing swimming |
More information on swimming in San Francisco in september
San Diego
September | |||
Average sea temperature | 67°F | ||
Minimum sea temperature | 65°F | ||
Maximum sea temperature | 70°F | ||
Average outside temperature | 77°F | ||
Maximum outside temperature | 81°F | ||
Minimum outside temperature | 74°F | ||
Precipitation | 0.7in | ||
Number of days of precipitation | 1 jour(s) (4%) | ||
Cloud cover | 9% | ||
Our opinion | cool swimming |
More information on swimming in San Diego in september
Big Sur
September | |||
Average sea temperature | 58°F | ||
Minimum sea temperature | 56°F | ||
Maximum sea temperature | 60°F | ||
Average outside temperature | 67°F | ||
Maximum outside temperature | 72°F | ||
Minimum outside temperature | 61°F | ||
Precipitation | 0.2in | ||
Number of days of precipitation | 0 jour(s) (1%) | ||
Cloud cover | 12% | ||
Our opinion | freezing swimming |
More information on swimming in Big Sur in september
Cambria
September | |||
Average sea temperature | 59°F | ||
Minimum sea temperature | 55°F | ||
Maximum sea temperature | 62°F | ||
Average outside temperature | 70°F | ||
Maximum outside temperature | 77°F | ||
Minimum outside temperature | 65°F | ||
Precipitation | 0.3in | ||
Number of days of precipitation | 0 jour(s) (2%) | ||
Cloud cover | 7% | ||
Our opinion | freezing swimming |
List of coastal cities in California
Los Angeles in september | cool swimming |
San Francisco in september | freezing swimming |
San Diego in september | cool swimming |
Big Sur in september | freezing swimming |
Cambria in september | freezing swimming |
Carmel-by-the-Sea in september | freezing swimming |
Channel Islands National Park in september | cold swimming |
Crescent City in september | freezing swimming |
Encinitas in september | cool swimming |
Eureka in september | freezing swimming |
Gaviota in september | cold swimming |
Golden Gate National Recreation Area in september | freezing swimming |
Gualala in september | freezing swimming |
Half Moon Bay in september | freezing swimming |
Hollywood in september | cool swimming |
Jenner in september | freezing swimming |
Klamath in september | freezing swimming |
Malibu in september | cool swimming |
Manhattan Beach in september | cool swimming |
McKinleyville in september | freezing swimming |
Mendocino in september | freezing swimming |
Morro Bay in september | freezing swimming |
Moss Beach in september | freezing swimming |
Newport Beach in september | cool swimming |
Oakland in september | freezing swimming |
Oceanside in september | cool swimming |
Oxnard in september | cool swimming |
Pacific Grove in september | freezing swimming |
Pescadero in september | freezing swimming |
Pismo Beach in september | freezing swimming |
Point Reyes in september | freezing swimming |
San Clemente in september | cool swimming |
Santa Barbara in september | cold swimming |
Santa Cruz California in september | freezing swimming |
Santa Monica in september | cool swimming |
Sea Ranch in september | freezing swimming |
Stinson Beach in september | freezing swimming |
Timber Cove in september | freezing swimming |
Topanga in september | cool swimming |
Ventura in september | cool swimming |
Bodega Bay in september | freezing swimming |
Carlsbad in september | cool swimming |
Chula Vista in september | cool swimming |
Fort Bragg in september | freezing swimming |
Huntington Beach in september | cool swimming |