World sea water temperatures

Water temperature in Anacortes (WA) in September

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Is it warm enough to swim in Anacortes in September? Average water temperature in Anacortes in September is 54.7°F and therefore is not suitable for comfortable swimming. The warmest sea in Anacortes in September is 58.3°F, and the coldest is 50.9°F. Average high air temperature in Anacortes in September is 68°F, and average low temperature is 49°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Anacortes

Changes water temperature in Anacortes in September 2025, 2024

To get an accurate forecast for the water temperature in Anacortes for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Anacortes, 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 156.7°F56.1°F53.2°F57.7°F
September 256.3°F55.9°F52.3°F57.9°F
September 356.5°F55.8°F52.7°F57.7°F
September 457.2°F55.6°F53.1°F58.3°F
September 5 55.8°F53.1°F57.9°F
September 6 55.9°F52.9°F57.7°F
September 7 56.1°F52.9°F57.6°F
September 8 56.1°F53.2°F57.4°F
September 9 55.9°F53.1°F57.2°F
September 10 55.4°F53.4°F57°F
September 11 54.3°F54°F57.2°F
September 12 55.2°F54.3°F57.2°F
September 13 55.6°F54.5°F57.9°F
September 14 55.4°F54.5°F57.7°F
September 15 54.7°F54.1°F57.2°F
Day 2025 2024 Min Max
September 16 54.3°F53.6°F56.8°F
September 17 54.7°F53.4°F56.1°F
September 18 54.9°F52.5°F55.8°F
September 19 54°F52.5°F55.6°F
September 20 54.3°F52.3°F55.4°F
September 21 54.1°F52.2°F55.6°F
September 22 54.3°F52°F55.8°F
September 23 54.9°F52°F55.4°F
September 24 55.6°F52.2°F55.6°F
September 25 53.2°F52°F55.2°F
September 26 53.4°F51.6°F54.9°F
September 27 52.9°F51.6°F55°F
September 28 53.2°F51.4°F55°F
September 29 52.9°F51.3°F55.8°F
September 30 52.9°F50.9°F55.2°F
Anacortes water temp chart in September

Average water temperature in Anacortes in September over a decade

20152016201720182019
54.7°F55.9°F55.4°F55.6°F55.2°F
20202021202220232024
55.2°F55.6°F55.4°F55°F54.9°F

Anacortes sea state in September

Chart comparing the height of waves in Anacortes 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 Anacortes in September

Weather and climate in Anacortes in September

This data display average monthly climate indicators in Anacortes in September 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 temperature68°F
  • Average LOW temperature49°F
  • Average rainfall days8 days
  • Average rainfall38mm/1.5''
  • Average daylight13h
  • Average sunshine7h
  • Average UV index5

Anacortes 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

Temperature in neighboring cities

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

AvrMinMax
Olga53.6°F50.4°F57.6°F
Lopez Island53.1°F50.5°F56.7°F
Bowman Bay54.7°F50.7°F59.4°F
Deception Pass54.7°F50.7°F59.4°F
Lummi Island55.4°F51.3°F60.6°F
Oak Harbor54.3°F50.4°F59.2°F
San Juan Islands52.5°F49.6°F56.3°F
Bellingham56.7°F51.4°F64.6°F
Friday Harbor53.1°F49.8°F57.2°F
Eastsound55°F50.9°F59.9°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 Anacortes 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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