World sea water temperatures

Water temperature in Kenai (AK) in September

Is it warm enough to swim in Kenai in September? Average water temperature in Kenai in September is 53.1°F and therefore is not suitable for comfortable swimming. The warmest sea in Kenai in September is 57.7°F, and the coldest is 49.3°F. Average high air temperature in Kenai in September is 55°F, and average low temperature is 39°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Kenai

Changes water temperature in Kenai in September 2025, 2024

To get an accurate forecast for the water temperature in Kenai for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Kenai, 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 155.8°F54°F52.7°F57.7°F
September 255.6°F53.8°F52.7°F57.6°F
September 355.4°F54°F52.3°F57.2°F
September 455.2°F54°F52.3°F56.8°F
September 5 53.8°F52.2°F56.3°F
September 6 53.8°F52.2°F55.9°F
September 7 53.4°F52°F55.8°F
September 8 53.4°F51.8°F55.9°F
September 9 53.4°F52.2°F55.9°F
September 10 53.4°F51.8°F56.5°F
September 11 53.2°F51.6°F55.9°F
September 12 53.2°F51.4°F55.8°F
September 13 52.7°F51.4°F55.8°F
September 14 53.1°F50.9°F55.6°F
September 15 53.1°F50.9°F55.4°F
Day 2025 2024 Min Max
September 16 52.7°F50.9°F54.9°F
September 17 52.2°F51.1°F54.7°F
September 18 52.2°F51.1°F54.7°F
September 19 51.6°F51.1°F54.9°F
September 20 51.8°F50.9°F54.7°F
September 21 51.6°F50.9°F54.3°F
September 22 51.6°F50.2°F53.8°F
September 23 51.8°F50.2°F53.6°F
September 24 51.6°F50.7°F53.6°F
September 25 51.6°F50.4°F53.4°F
September 26 51.4°F50.2°F52.9°F
September 27 51.1°F49.5°F52.5°F
September 28 50.7°F49.8°F53.1°F
September 29 50.7°F49.5°F52.9°F
September 30 49.8°F49.3°F52.7°F
Kenai water temp chart in September

Average water temperature in Kenai in September over a decade

20152016201720182019
53.2°F54.9°F53.2°F54.1°F54.5°F
20202021202220232024
54.3°F52.7°F52.9°F52.2°F52.5°F

Kenai sea state in September

Chart comparing the height of waves in Kenai 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 Kenai in September

Weather and climate in Kenai in September

This data display average monthly climate indicators in Kenai 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 temperature55°F
  • Average LOW temperature39°F
  • Average rainfall days16 days
  • Average rainfall84mm/3.3''
  • Average snowfall5mm/0.2''

Kenai 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
Cook Inlet52.7°F49.1°F56.7°F
Anchor Point50.9°F48.2°F54.7°F
Homer51.1°F48.2°F55.8°F
Seward53.1°F48.7°F57.4°F
Whittier51.4°F46.6°F55.6°F
Prince William Sound53.4°F48.7°F58.8°F
Valdez52.5°F48.7°F57.9°F
Kodiak50.4°F46.8°F55.8°F
Bristol Bay53.1°F47.1°F60.3°F
Togiak52.3°F45.1°F61.3°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 Kenai 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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