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Water temperature in Gustavus (AK) in September

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Is it warm enough to swim in Gustavus in September? Average water temperature in Gustavus in September is 50.7°F and therefore is not suitable for comfortable swimming. The warmest sea in Gustavus in September is 55.2°F, and the coldest is 46.9°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Gustavus

Changes water temperature in Gustavus in September 2025, 2024

To get an accurate forecast for the water temperature in Gustavus for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Gustavus, 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 153.2°F51.3°F50.2°F55.2°F
September 252.7°F50.7°F50°F54.7°F
September 352°F50.7°F49.5°F54.7°F
September 452.3°F50.5°F49.5°F54.3°F
September 551.6°F50.5°F49.5°F53.8°F
September 650.4°F50.4°F48.9°F53.6°F
September 750.7°F50°F48.7°F53.6°F
September 850.4°F49.8°F49.5°F53.8°F
September 950.5°F48.9°F48.9°F53.8°F
September 1050.5°F50.5°F48.7°F53.4°F
September 1150.2°F49.8°F48.6°F52.9°F
September 1250°F50°F48.4°F52.7°F
September 1348.9°F50°F48.2°F52.3°F
September 1449.3°F50.7°F48.6°F52.7°F
September 1549.5°F50.7°F49.5°F53.2°F
Day 2025 2024 Min Max
September 1649.6°F50.4°F49.1°F53.2°F
September 1750.7°F49.8°F49.1°F53.2°F
September 1850.5°F49.8°F49.5°F52.9°F
September 1950.5°F49.3°F49.3°F52.7°F
September 2050.4°F47.8°F47.8°F52.3°F
September 2150.5°F47.7°F47.7°F52.2°F
September 2250.2°F47.3°F47.3°F51.4°F
September 2349.8°F49.5°F48.6°F51.4°F
September 2450°F49.3°F48.4°F51.4°F
September 2549.8°F49.5°F48.2°F51.3°F
September 26 49.5°F47.1°F51.1°F
September 27 49.3°F47.1°F50.9°F
September 28 49.1°F46.9°F50.5°F
September 29 47.8°F47.1°F50.7°F
September 30 47.8°F46.9°F50.5°F
Gustavus water temp chart in September

Average water temperature in Gustavus in September over a decade

20152016201720182019
50.2°F52°F51.6°F50.9°F51.8°F
20202021202220232024
51.4°F51.3°F51.1°F50.4°F49.6°F

Gustavus sea state in September

Chart comparing the height of waves in Gustavus 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 Gustavus in September

Gustavus 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
Glacier Bay50°F45.3°F55.4°F
Skagway50.9°F47.1°F56.5°F
Yakutat54.3°F50.4°F58.1°F
Haida Gwaii57.4°F53.1°F61.7°F
Cordova52.9°F49.1°F57.4°F
Seward53.1°F48.7°F57.4°F
Anchorage53.8°F47.8°F59.7°F
Kenai53.1°F49.3°F57.7°F
Anchor Point50.9°F48.2°F54.7°F
Kodiak50.4°F46.8°F55.8°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 Gustavus 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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