World sea water temperatures

Water temperature in Eureka (CA) in August

Is it warm enough to swim in Eureka in August? Average water temperature in Eureka in August is 55°F and therefore is not suitable for comfortable swimming. The warmest sea in Eureka in August is 61.9°F, and the coldest is 48.2°F. Average high air temperature in Eureka in August is 64°F, and average low temperature is 53°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Eureka

Changes water temperature in Eureka in August 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
August 154.1°F54.9°F51.1°F58.3°F
August 254.3°F54.3°F50.7°F58.8°F
August 354.5°F53.2°F51.3°F58.8°F
August 454.3°F50.4°F50.4°F58.1°F
August 555°F50°F50°F57.6°F
August 655.6°F48.2°F48.2°F57.4°F
August 756.5°F49.6°F49.6°F59.5°F
August 856.8°F50.9°F50.9°F60.3°F
August 956.1°F48.6°F48.6°F61.3°F
August 1056.3°F51.1°F51.1°F60.4°F
August 1155.2°F51.8°F51.8°F61.7°F
August 1252.3°F50.7°F50.7°F61.9°F
August 1352.9°F52.2°F51.6°F60.3°F
August 1455.2°F53.6°F51.8°F59.9°F
August 1555.9°F53.6°F51.8°F59.9°F
Day 2025 2024 Min Max
August 1656.8°F54.1°F52.3°F59.5°F
August 1755.2°F55°F52°F58.6°F
August 1856.7°F54.5°F52.7°F58.3°F
August 1956.8°F55.8°F51.6°F58.3°F
August 2057.2°F55.6°F50.5°F59.2°F
August 2157.2°F56.5°F50.5°F59.2°F
August 2257°F57°F51.3°F59°F
August 2354.7°F55.4°F51.8°F58.6°F
August 2455°F55.2°F52.2°F58.5°F
August 2552.9°F55.6°F52.3°F58.8°F
August 2653.4°F55.9°F52.7°F59.2°F
August 2751.6°F56.1°F51.6°F59.7°F
August 2852°F56.7°F52°F60.3°F
August 2954.1°F56.5°F53.2°F60.3°F
August 3055.2°F56.5°F53.1°F60.4°F
August 3156.1°F55.4°F50.4°F61°F
Eureka water temp chart in August

Average water temperature in Eureka in August over a decade

20162017201820192020
53.4°F55.6°F54.3°F56.1°F54.7°F
20212022202320242025
54°F56.3°F56.3°F53.6°F55.2°F

Eureka sea state in August

Chart comparing the height of waves in Eureka in August 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 Eureka in August

Weather and climate in Eureka in August

This data display average monthly climate indicators in Eureka in August based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

  • Average HIGH temperature64°F
  • Average LOW temperature53°F
  • Average rainfall days3 days
  • Average rainfall8mm/0.3''
  • Average sunshine7.6h

Eureka 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 August?

Want to know where the water temperature in August 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 August

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

AvrMinMax
San Diego69.8°F62.6°F76.6°F
Santa Monica68.4°F60.8°F74.7°F
La Jolla Cove70.9°F63.5°F77.7°F
Lake Tahoe68°F63.9°F72°F
Los Angeles67.8°F62.2°F72.9°F
Samoa55°F48°F61.5°F
King Salmon55°F48.4°F61.3°F
Humboldt Beach55.2°F48°F61.7°F
Manila55.2°F48°F61.7°F
McKinleyville55.4°F48.7°F61.5°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 Eureka 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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