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Water temperature in Coupeville (WA) in August

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Is it warm enough to swim in Coupeville in August? Average water temperature in Coupeville in August is 55°F and therefore is not suitable for comfortable swimming. The warmest sea in Coupeville in August is 60.3°F, and the coldest is 50.7°F. Average high air temperature in Coupeville in August is 72°F, and average low temperature is 51°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Coupeville

Changes water temperature in Coupeville in August 2025, 2024

To get an accurate forecast for the water temperature in Coupeville for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Coupeville, 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 155.9°F56.1°F50.9°F59.5°F
August 255.8°F56.7°F50.7°F59.7°F
August 355.6°F57.2°F50.9°F60.3°F
August 455.4°F57.4°F51.4°F59.5°F
August 556.7°F56.8°F51.1°F60.3°F
August 656.5°F55.8°F51.3°F57.9°F
August 757.2°F55°F51.4°F58.8°F
August 856.1°F55.8°F51.6°F57.6°F
August 955.6°F55.8°F51.8°F57.7°F
August 1056.1°F55.9°F51.4°F57.6°F
August 1155.9°F57.4°F51.3°F57.7°F
August 1255.6°F56.8°F51.1°F58.1°F
August 1356.3°F56.7°F51.1°F58.5°F
August 1456.3°F56.1°F50.9°F57.4°F
August 1556.1°F55.9°F50.9°F58.5°F
Day 2025 2024 Min Max
August 1655.8°F55.8°F50.7°F57.9°F
August 1755.6°F57.2°F50.9°F58.3°F
August 1855.4°F57.2°F51.8°F58.3°F
August 1957.7°F56.7°F51.4°F58.1°F
August 2055.8°F56.5°F51.4°F58.8°F
August 2155.8°F55.6°F51.8°F58.6°F
August 2255.2°F56.8°F51.4°F57.9°F
August 2355°F56.5°F51.3°F57.7°F
August 2455.9°F56.1°F51.3°F57.9°F
August 2557.2°F55.6°F51.8°F58.8°F
August 2657°F55.4°F52°F59°F
August 2757°F54.9°F52°F57.9°F
August 2857.4°F54.1°F51.6°F58.5°F
August 2957.4°F54.7°F51.3°F57.4°F
August 3056.3°F54.5°F51.1°F56.8°F
August 3155.8°F55.2°F50.7°F58.1°F
Coupeville water temp chart in August

Average water temperature in Coupeville in August over a decade

20162017201820192020
56.5°F55.6°F55.9°F57°F57°F
20212022202320242025
55.4°F57.2°F55.9°F56.1°F56.1°F

Coupeville sea state in August

Chart comparing the height of waves in Coupeville 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 Coupeville in August

Weather and climate in Coupeville in August

This data display average monthly climate indicators in Coupeville 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 temperature72°F
  • Average LOW temperature51°F
  • Average rainfall days5 days
  • Average rainfall23mm/0.9''

Coupeville 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

Temperature in neighboring cities

The nearest locations with the average water temperature in August. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Oak Harbor55.6°F51.4°F60.1°F
Port Townsend55°F50.4°F61.2°F
Bowman Bay56.1°F52°F61.3°F
Deception Pass56.1°F52°F61.3°F
Discovery Bay54.5°F50.4°F61.2°F
Sequim54.3°F50.5°F60.4°F
Port Ludlow56.5°F52.7°F60.4°F
Langley58.1°F52.9°F66°F
Warm Beach58.5°F52.7°F67.8°F
Lopez Island54.1°F50.2°F59.5°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 Coupeville 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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