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Water temperature in Montalvin (CA) in September

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Is it warm enough to swim in Montalvin in September? Average water temperature in Montalvin in September is 62.4°F and therefore is not suitable for comfortable swimming. The warmest sea in Montalvin in September is 70.9°F, and the coldest is 55.4°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Montalvin

Changes water temperature in Montalvin in September 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
September 169.4°F66.9°F56.1°F69.4°F
September 270°F66.6°F56.5°F70°F
September 367.8°F67.8°F56.7°F69.3°F
September 468°F68.9°F56.7°F69.4°F
September 568.4°F67.8°F56.5°F69.3°F
September 6 67.5°F56.5°F69.6°F
September 7 67.1°F56.3°F70.3°F
September 8 68.4°F56.3°F70.9°F
September 9 68.2°F56.1°F70°F
September 10 67.8°F55.9°F69.4°F
September 11 67.1°F55.8°F68.9°F
September 12 67.3°F55.9°F69.6°F
September 13 66°F56.3°F68.7°F
September 14 66°F56.8°F69.3°F
September 15 65.3°F56.3°F68.9°F
Day 2025 2024 Min Max
September 16 65.3°F56.8°F68.4°F
September 17 65.1°F57.4°F67.8°F
September 18 65.1°F56.7°F67.8°F
September 19 65.7°F57.2°F67.6°F
September 20 66.4°F57°F68.7°F
September 21 64.9°F56.8°F69.1°F
September 22 65.7°F56.7°F68.7°F
September 23 64.6°F56.7°F68°F
September 24 66.4°F56.5°F67.6°F
September 25 65.1°F56.7°F68.5°F
September 26 64.8°F56.5°F68.4°F
September 27 64.6°F55.4°F67.5°F
September 28 65.8°F55.8°F69.4°F
September 29 64.6°F55.9°F68.7°F
September 30 65.5°F56.1°F68.4°F
Montalvin water temp chart in September

Average water temperature in Montalvin in September over a decade

20152016201720182019
60.6°F59°F65.8°F65.1°F68°F
20202021202220232024
67.5°F66.7°F68°F66.9°F66.2°F

Montalvin sea state in September

Chart comparing the height of waves in Montalvin in September 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 Montalvin in September

Montalvin 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 September?

Want to know where the water temperature in September 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 September

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

AvrMinMax
San Diego69.1°F63.1°F75.6°F
Santa Monica68.4°F62.6°F73.4°F
La Jolla Cove70°F63.7°F76.1°F
Lake Tahoe64.9°F59°F70.5°F
Los Angeles68.2°F61.5°F74.3°F
San Pablo Bay62.4°F55.4°F70.9°F
Pinole62.2°F55.4°F71.1°F
Rodeo62.2°F55.4°F71.1°F
China Camp62.4°F55.6°F70.7°F
San Francisco Bay62.1°F55.6°F69.4°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 Montalvin 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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