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Water temperature in Balboa Island (CA) in September

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Is it warm enough to swim in Balboa Island in September? Average water temperature in Balboa Island in September is 69.3°F and therefore suitable for comfortable swimming. The warmest sea in Balboa Island in September is 75.6°F, and the coldest is 62.8°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Balboa Island

Changes water temperature in Balboa Island in September 2025, 2024

To get an accurate forecast for the water temperature in Balboa Island for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Balboa Island, 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 171.2°F70.2°F65.1°F73.6°F
September 271.4°F70°F65.5°F73.8°F
September 371.1°F70°F65.5°F73.9°F
September 470.7°F70.5°F64.4°F73.9°F
September 5 70.2°F63.7°F73.8°F
September 6 71.4°F64°F73.8°F
September 7 71.8°F65.5°F74.7°F
September 8 72.1°F66°F73.9°F
September 9 70.9°F66°F75.2°F
September 10 69.6°F65.3°F74.5°F
September 11 68.9°F64.8°F75.6°F
September 12 68.9°F63.3°F75.2°F
September 13 68.4°F62.8°F75.4°F
September 14 68.5°F63.3°F75°F
September 15 68.5°F64°F75.2°F
Day 2025 2024 Min Max
September 16 69.6°F65.1°F75°F
September 17 69.3°F65.1°F75°F
September 18 69.1°F65.3°F74.8°F
September 19 69.4°F65.3°F74.8°F
September 20 68.7°F65.1°F75.2°F
September 21 67.8°F64.9°F74.3°F
September 22 66.6°F64.6°F73.9°F
September 23 66.4°F64.8°F73.6°F
September 24 66°F64.9°F73.9°F
September 25 65.5°F65.3°F74.1°F
September 26 64°F63.9°F74.3°F
September 27 64.9°F64.8°F74.3°F
September 28 65.3°F65.1°F74.5°F
September 29 64.2°F64.2°F74.5°F
September 30 63.5°F63.5°F74.3°F
Balboa Island water temp chart in September

Average water temperature in Balboa Island in September over a decade

20152016201720182019
74.3°F69.1°F70.2°F71.1°F72.3°F
20202021202220232024
69.3°F67.5°F71.8°F68.2°F68.4°F

Balboa Island sea state in September

Chart comparing the height of waves in Balboa Island 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 Balboa Island in September

Balboa Island 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
Corona Del Mar69.3°F62.8°F75.6°F
Balboa Peninsula69.3°F62.8°F75.6°F
The Wedge69.3°F62.8°F75.6°F
Newport Beach69.3°F63°F75.6°F
Costa Mesa69.3°F63°F75.6°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 Balboa Island 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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