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Water temperature in McKinleyville (CA) in September

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Is it warm enough to swim in McKinleyville in September? Average water temperature in McKinleyville in September is 55.2°F and therefore is not suitable for comfortable swimming. The warmest sea in McKinleyville in September is 61.2°F, and the coldest is 49.3°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in McKinleyville

Changes water temperature in McKinleyville in September 2025, 2024

To get an accurate forecast for the water temperature in McKinleyville for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in McKinleyville, 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 157.2°F54.7°F50°F61.2°F
September 257°F56.3°F49.3°F61°F
September 356.7°F57.2°F50.7°F60.6°F
September 455.4°F56.8°F50.7°F60.6°F
September 555.2°F55.4°F51.8°F60.6°F
September 655.8°F52.5°F52.2°F60.3°F
September 757.6°F53.2°F52.3°F59.7°F
September 857.7°F53.2°F52°F59.2°F
September 958.1°F54.5°F52.2°F59.4°F
September 1058.6°F52.3°F52°F60.8°F
September 1158.3°F53.6°F52.2°F59.4°F
September 1258.3°F55.4°F52.5°F58.6°F
September 1357.4°F55.6°F52.5°F58.3°F
September 1457.7°F54.7°F52.5°F57.7°F
September 1556.8°F54.7°F52.9°F57.4°F
Day 2025 2024 Min Max
September 1657.4°F54°F52.7°F58.3°F
September 1754.9°F53.2°F52.3°F57.7°F
September 1852°F54.1°F52°F58.8°F
September 1952.9°F54.7°F52.9°F59°F
September 2053.4°F54°F53.4°F59.2°F
September 2154.1°F52.3°F52.3°F58.6°F
September 2256.5°F51.3°F51.3°F59.4°F
September 2356.5°F52.7°F52.7°F60.1°F
September 2456.3°F53.4°F53.1°F60.4°F
September 2553.6°F52.7°F52.7°F60.3°F
September 2655.8°F53.6°F52.9°F60.8°F
September 27 53.8°F52.7°F61.2°F
September 28 53.2°F52.9°F60.6°F
September 29 54.1°F52.9°F60.4°F
September 30 52.9°F52.9°F60.1°F
McKinleyville water temp chart in September

Average water temperature in McKinleyville in September over a decade

20152016201720182019
56.8°F54.7°F56.8°F54°F57.4°F
20202021202220232024
55.6°F53.1°F55.2°F54.9°F54°F

McKinleyville sea state in September

Chart comparing the height of waves in McKinleyville 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 McKinleyville in September

McKinleyville 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
Manila55.2°F49.3°F61.3°F
Fort Bragg55.8°F51.1°F62.8°F
Glass Beach55.8°F51.1°F62.8°F
Mendocino55.6°F50.5°F62.6°F
Bandon54.3°F47.8°F62.2°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 McKinleyville 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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