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Water temperature in San Onofre Beach (CA) in April

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Is it warm enough to swim in San Onofre Beach in April? Average water temperature in San Onofre Beach in April is 60.3°F and therefore is not suitable for comfortable swimming. The warmest sea in San Onofre Beach in April is 65.8°F, and the coldest is 53.8°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 April 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 April.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
April 156.7°F58.1°F56.3°F65.5°F
April 254.3°F58.6°F54.3°F64.9°F
April 354.5°F59.9°F54.5°F64.8°F
April 454.3°F59.5°F54.3°F64.9°F
April 555°F58.5°F53.8°F64.6°F
April 655.6°F58.1°F54.1°F64°F
April 756.3°F57.9°F54.3°F63.5°F
April 857°F57.9°F54.5°F63.1°F
April 958.5°F58.5°F54.7°F62.6°F
April 1059°F58.8°F55.2°F62.8°F
April 1159.5°F59.7°F55.9°F63°F
April 1259.5°F59.2°F55.6°F62.8°F
April 1360.1°F58.8°F55.8°F63°F
April 1460.4°F58.8°F56.3°F63°F
April 1559.9°F59.4°F56.7°F63°F
Day 2025 2024 Min Max
April 1659.9°F59.7°F57°F63°F
April 1760.6°F60.3°F57.6°F63.1°F
April 1859.2°F60.3°F57.6°F63.3°F
April 1958.5°F61.2°F57°F63.7°F
April 2058.1°F61.3°F56.5°F63.7°F
April 2158.5°F61.3°F56.1°F63.5°F
April 2259.7°F61.3°F55.9°F63.3°F
April 2360.6°F61.5°F56.1°F63.1°F
April 2460.4°F60.8°F57°F63.3°F
April 2560.1°F59.7°F57.7°F63.3°F
April 2659.7°F59.9°F57.9°F63.9°F
April 2760.1°F60.6°F58.8°F64.4°F
April 2860.8°F61°F59°F65.8°F
April 2961.5°F61.9°F59°F65.8°F
April 3061.5°F61.7°F58.3°F65.7°F
San Onofre Beach water temp chart in April

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

20162017201820192020
62.6°F61.7°F60.3°F61.5°F61.3°F
20212022202320242025
61.3°F60.6°F57.7°F59.7°F58.6°F

San Onofre Beach sea state in April

Chart comparing the height of waves in San Onofre Beach in April 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 April

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 April?

Want to know where the water temperature in April 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 April

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

AvrMinMax
Santa Monica58.6°F54°F63.9°F
La Jolla Cove61.2°F55.6°F68.7°F
Lake Tahoe44.6°F40.8°F52.7°F
Los Angeles58.8°F54.9°F63.7°F
Trestles Beach60.3°F53.8°F65.8°F
T-Street Beach60.3°F54°F65.8°F
Baby Beach60.3°F54.5°F65.3°F
Capistrano Beach60.3°F54.5°F65.3°F
Doheny Beach60.3°F54.5°F65.3°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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