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Water temperature in San Onofre Beach (CA) in August

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Is it warm enough to swim in San Onofre Beach in August? Average water temperature in San Onofre Beach in August is 70.5°F and therefore suitable for comfortable swimming. The warmest sea in San Onofre Beach in August is 77.7°F, and the coldest is 62.6°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in San Onofre Beach

Changes water temperature in San Onofre Beach in August 2025, 2024

To get an accurate forecast for the water temperature in San Onofre Beach for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in San Onofre Beach, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of August.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
August 167.3°F66.4°F64.6°F75.9°F
August 267.6°F66°F65.1°F75.9°F
August 368°F65.7°F64.6°F75.6°F
August 468.4°F65.3°F65.1°F75.7°F
August 568.9°F65.3°F65.3°F75.9°F
August 669.3°F65.7°F65.7°F75.6°F
August 769.4°F67.8°F66°F75.2°F
August 869.6°F70.5°F67.1°F75.2°F
August 970.5°F71.1°F66.9°F76.8°F
August 1071.2°F71.8°F66.9°F77.7°F
August 1171.6°F72.1°F66.7°F77.5°F
August 1272.5°F72.9°F66.4°F76.1°F
August 1372.3°F72.5°F66.4°F75.4°F
August 1472°F72.7°F65.1°F75.2°F
August 1571.4°F73.4°F63.7°F74.7°F
Day 2025 2024 Min Max
August 1671.2°F73.6°F64.2°F74.8°F
August 1772°F73.6°F64.6°F74.7°F
August 1872.7°F73.8°F63.9°F75°F
August 1972.7°F74.3°F64.9°F75°F
August 2073°F73.8°F64.8°F75.2°F
August 2173.6°F73.4°F65.3°F75.2°F
August 2274.3°F73.2°F64.9°F75.7°F
August 2374.3°F73°F65.3°F76.3°F
August 2474.1°F73°F65.7°F76.6°F
August 2573.8°F73°F63.7°F75.6°F
August 2673.4°F72.5°F63.7°F74.7°F
August 2773°F72.1°F63.1°F74.8°F
August 2872.5°F72.1°F62.6°F75°F
August 2972.3°F72°F63.3°F75°F
August 3071.8°F71.4°F65.7°F74.8°F
August 3171.4°F71.1°F67.3°F74.8°F
San Onofre Beach water temp chart in August

Average water temperature in San Onofre Beach in August over a decade

20162017201820192020
72.1°F71.4°F75.2°F70.7°F71.6°F
20212022202320242025
68.5°F72°F68.2°F71.1°F68.7°F

San Onofre Beach sea state in August

Chart comparing the height of waves in San Onofre Beach in August over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in San Onofre Beach in August

San Onofre Beach water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in August?

Want to know where the water temperature in August is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Best Beach Resorts in California in August

Places with the warmest average sea water temperature in California in August. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Santa Monica68.4°F60.8°F74.7°F
La Jolla Cove70.9°F63.5°F77.7°F
Lake Tahoe68°F63.9°F72°F
Los Angeles67.8°F62.2°F72.9°F
Trestles Beach70.5°F62.6°F77.7°F
T-Street Beach70.5°F62.8°F77.5°F
Baby Beach70.5°F62.6°F76.8°F
Capistrano Beach70.5°F62.6°F76.8°F
Doheny Beach70.5°F62.6°F76.8°F

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for San Onofre Beach is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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