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Water temperature in San Diego (CA) in December

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Is it warm enough to swim in San Diego in December? Average water temperature in San Diego in December is 60.6°F and therefore is not suitable for comfortable swimming. The warmest sea in San Diego in December is 66°F, and the coldest is 56.3°F. Average high air temperature in San Diego in December is 65°F, and average low temperature is 48°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in San Diego

Changes water temperature in San Diego in December 2024, 2023

To get an accurate forecast for the water temperature in San Diego 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 Diego, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of December.

You can choose any other years:

Year 1:   Year 2:


Day 2024 2023 Min Max
December 157.2°F63.3°F56.8°F66°F
December 257.2°F63.3°F56.7°F65.7°F
December 357.2°F63.3°F57°F65.7°F
December 457.7°F63.7°F57.2°F65.5°F
December 558.1°F63.7°F57.2°F65.5°F
December 657.6°F63.5°F57.6°F65.7°F
December 757.4°F63.5°F57.4°F65.7°F
December 857.2°F63.3°F57.2°F65.7°F
December 957.6°F63.1°F57.6°F65.7°F
December 1057.6°F62.6°F57.4°F65.7°F
December 1156.7°F61.9°F56.7°F65.7°F
December 1256.8°F62.4°F56.8°F65.3°F
December 1356.7°F62.4°F56.7°F65.1°F
December 1456.5°F62.2°F56.5°F64.6°F
December 1556.5°F62.1°F56.5°F64.4°F
Day 2024 2023 Min Max
December 1656.8°F61.9°F56.8°F64.2°F
December 1756.8°F61.9°F56.8°F64°F
December 1857.2°F62.4°F57.2°F64°F
December 1957.4°F62.4°F57.4°F64.2°F
December 2057.7°F62.6°F57.4°F64°F
December 2157.4°F63°F57.4°F64.2°F
December 2257°F63.3°F57°F64.2°F
December 2356.8°F63.1°F56.8°F64.4°F
December 2457°F63°F57°F64.4°F
December 2556.8°F63°F56.8°F63.9°F
December 2656.7°F63°F56.7°F63.5°F
December 2756.7°F62.6°F56.7°F63.1°F
December 2857.2°F62.4°F56.7°F63.1°F
December 2957.4°F62.1°F56.5°F63°F
December 3057.6°F62.4°F56.3°F62.8°F
December 3157.2°F62.4°F56.3°F62.4°F
San Diego water temp chart in December

Average water temperature in San Diego in December over a decade

20152016201720182019
64°F60.3°F62.6°F62.4°F61.2°F
20202021202220232024
59.9°F60.6°F58.8°F62.8°F57.2°F

San Diego sea state in December

Chart comparing the height of waves in San Diego in December 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 Diego in December

Weather and climate in San Diego in December

This data display average monthly climate indicators in San Diego in December based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

  • Average HIGH temperature65°F
  • Average LOW temperature48°F
  • Average humidity
    64
  • Average rainfall days6 days
  • Average rainfall38mm/1.5''
  • Average daylight10h
  • Average sunshine7.5h
  • Average UV index3

San Diego 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 December?

Want to know where the water temperature in December 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

San Diego beaches in December

The best beaches with the average ocean water temperature in December. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown.

AvrMinMax
Carlsbad60.6°F56.5°F65.5°F
Coronado60.1°F55.4°F65.1°F
Oceanside61°F57.6°F65.7°F
La Jolla Shores60.8°F56.5°F65.5°F
Pacific Beach60.6°F55.9°F65.5°F
Mission Beach60.4°F55.4°F65.3°F
Imperial Beach60.3°F55.2°F65.5°F
San Onofre Beach60.8°F57.2°F65.7°F
Del Mar60.6°F56.1°F65.5°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 Diego 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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