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Water temperature in Foster City (CA) in December

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Is it warm enough to swim in Foster City in December? Average water temperature in Foster City in December is 54.1°F and therefore is not suitable for comfortable swimming. The warmest sea in Foster City in December is 59.4°F, and the coldest is 50.9°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Foster City

Changes water temperature in Foster City in December 2024, 2023

To get an accurate forecast for the water temperature in Foster City for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Foster City, 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 154.5°F57.2°F52.9°F59.2°F
December 255.4°F56.8°F52.7°F58.8°F
December 355.2°F56.7°F52.9°F58.8°F
December 455.6°F57.4°F52.5°F59°F
December 555.2°F57°F52.7°F59.2°F
December 655.2°F57°F52.7°F59.4°F
December 755°F56.3°F52.7°F58.5°F
December 854.7°F56.8°F52.7°F59°F
December 955.8°F56.1°F52.3°F58.8°F
December 1055.2°F55.9°F52.3°F58.8°F
December 1155°F55.8°F52.7°F59°F
December 1254.9°F55.6°F52.5°F58.8°F
December 1354.7°F55°F52.5°F59°F
December 1454.3°F54.9°F52.5°F58.6°F
December 1554°F54.7°F52.5°F58.5°F
Day 2024 2023 Min Max
December 1653.2°F54.7°F52°F58.5°F
December 1753.2°F54.3°F51.3°F58.3°F
December 1854°F54.3°F51.4°F57.9°F
December 1953.4°F54.9°F51.6°F58.1°F
December 2054°F54.7°F51.6°F58.5°F
December 2153.8°F54.5°F50.9°F58.5°F
December 2253.8°F54.7°F51.1°F58.3°F
December 2354°F56.5°F51.4°F58.6°F
December 2454.3°F55.9°F51.3°F58.5°F
December 2554.7°F55.8°F51.6°F58.3°F
December 2654.5°F55.6°F51.8°F57.7°F
December 2754.3°F55.2°F51.8°F57.4°F
December 2854°F54.7°F51.6°F57.2°F
December 2954.7°F54.7°F51.6°F57.2°F
December 3055.4°F54.7°F51.4°F56.5°F
December 3154.9°F54.7°F51.3°F55.8°F
Foster City water temp chart in December

Average water temperature in Foster City in December over a decade

20152016201720182019
55.2°F53.8°F54.9°F55°F54.5°F
20202021202220232024
53.8°F54.9°F52.3°F55.6°F54.5°F

Foster City sea state in December

Chart comparing the height of waves in Foster City 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 Foster City in December

Foster City 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

Best Beach Resorts in California in December

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

AvrMinMax
San Diego60.6°F56.3°F66°F
Santa Monica60.3°F55.6°F65.5°F
La Jolla Cove60.8°F56.3°F65.5°F
Lake Tahoe46.4°F42.3°F52°F
Los Angeles60.1°F55.2°F65.1°F
Millbrae54.1°F50.4°F59.2°F
Mountain View54.3°F50.9°F59.4°F
Palo Alto54.3°F50.9°F59.4°F
San Leandro54°F49.6°F59°F
Oakland54°F49.6°F59°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 Foster City 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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