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Water temperature in Castro Valley (CA) in October

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Is it warm enough to swim in Castro Valley in October? Average water temperature in Castro Valley in October is 60.8°F and therefore is not suitable for comfortable swimming. The warmest sea in Castro Valley in October is 72.5°F, and the coldest is 54.3°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Castro Valley

Changes water temperature in Castro Valley in October 2024, 2023

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

You can choose any other years:

Year 1:   Year 2:


Day 2024 2023 Min Max
October 171.1°F66.9°F56.7°F71.1°F
October 270.5°F66.7°F56.1°F70.5°F
October 372.1°F66.9°F55.2°F72.1°F
October 471.8°F67.5°F55°F71.8°F
October 571.6°F68.5°F55°F71.6°F
October 672.5°F69.8°F55.4°F72.5°F
October 770.9°F71.2°F55.4°F71.2°F
October 872.5°F70.3°F55.8°F72.5°F
October 972°F70°F54.7°F72°F
October 1069.8°F69.3°F54.3°F69.8°F
October 1168.5°F68.4°F54.3°F68.5°F
October 1267.5°F67.3°F54.5°F67.5°F
October 1369.4°F66.9°F54.7°F69.4°F
October 1469.4°F65.8°F55°F69.4°F
October 1569.1°F65.5°F55.4°F69.8°F
Day 2024 2023 Min Max
October 1668°F68°F55.9°F71.2°F
October 1767.8°F67.1°F56.3°F70°F
October 1866.7°F67.3°F56.3°F70.5°F
October 1965.1°F68.5°F56.1°F70.9°F
October 2065.3°F68.5°F55.8°F70.7°F
October 2165.1°F68.2°F55.8°F70.2°F
October 2264.6°F67.8°F55.9°F70.5°F
October 2364.4°F67.5°F56.1°F69.6°F
October 2464.8°F66.6°F56.1°F69.4°F
October 2565.1°F66.7°F55.9°F69.1°F
October 2664.6°F64.9°F56.1°F66.4°F
October 2764°F64.8°F55.6°F65.3°F
October 2863.9°F64°F54.7°F64.9°F
October 2962.8°F63.5°F54.7°F64.2°F
October 3062.4°F62.2°F55.2°F63.9°F
October 3161.9°F61.7°F54.9°F63.9°F
Castro Valley water temp chart in October

Average water temperature in Castro Valley in October over a decade

20152016201720182019
61.7°F58.1°F57.9°F65.5°F64.2°F
20202021202220232024
66°F63.9°F65.1°F67.1°F67.6°F

Castro Valley sea state in October

Chart comparing the height of waves in Castro Valley in October 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 Castro Valley in October

Castro Valley 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 October?

Want to know where the water temperature in October 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 October

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

AvrMinMax
San Diego66.9°F62.1°F73.8°F
Santa Monica66.4°F60.3°F73.2°F
La Jolla Cove67.3°F63°F73.6°F
Lake Tahoe58.6°F53.2°F64.2°F
Los Angeles66.4°F61°F73.8°F
Millbrae60.8°F54.3°F72.1°F
Foster City60.6°F54.1°F72.1°F
San Leandro61°F54.3°F73°F
San Jose60.4°F54.1°F72.1°F
Coyote Point60.6°F54.1°F71.6°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 Castro Valley 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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