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Water temperature in Alexandria Bay (NY) in September

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Is it warm enough to swim in Alexandria Bay in September? Average water temperature in Alexandria Bay in September is 68.9°F and therefore suitable for comfortable swimming. The warmest water in Alexandria Bay in September is 75.4°F, and the coldest is 63.1°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Alexandria Bay

Changes water temperature in Alexandria Bay in September 2025, 2024

To get an accurate forecast for the water temperature in Alexandria Bay for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Alexandria Bay, 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 166.4°F69.8°F66.4°F73.9°F
September 266.6°F69.6°F66.6°F73.6°F
September 368.5°F69.3°F68.5°F73.6°F
September 468.4°F68.7°F68.4°F73.4°F
September 5 69.4°F68.9°F74.5°F
September 6 69.3°F68.7°F75.4°F
September 7 68.9°F68.4°F74.5°F
September 8 68.7°F68.7°F73.8°F
September 9 68.2°F68.2°F73.4°F
September 10 67.1°F67.1°F73.4°F
September 11 66.9°F66.9°F72.1°F
September 12 66.9°F66.9°F72°F
September 13 66.6°F66.6°F72°F
September 14 67.1°F67.1°F71.4°F
September 15 67.6°F67.1°F71.1°F
Day 2025 2024 Min Max
September 16 68.4°F66.2°F70.5°F
September 17 69.1°F65.7°F71.1°F
September 18 67.8°F65.7°F70.5°F
September 19 68.9°F65.7°F71.1°F
September 20 68.5°F65.5°F71.2°F
September 21 68.4°F65.3°F70.7°F
September 22 68.5°F64.9°F70.5°F
September 23 69.3°F64.4°F70.2°F
September 24 68.7°F64.4°F70.3°F
September 25 68.2°F64.2°F70.7°F
September 26 68.2°F64.6°F71.1°F
September 27 68°F64.6°F71.1°F
September 28 67.6°F64.4°F70.2°F
September 29 67.5°F64.2°F69.3°F
September 30 66.9°F63.1°F68°F
Alexandria Bay water temp chart in September

Average water temperature in Alexandria Bay in September over a decade

20152016201720182019
69.8°F71.1°F69.4°F70.5°F67.3°F
20202021202220232024
68.2°F68.4°F68.9°F69.1°F68.2°F

Alexandria Bay sea state in September

Chart comparing the height of waves in Alexandria Bay 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 Alexandria Bay in September

Alexandria Bay 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
New York City71.1°F64.8°F78.1°F
Clayton68.5°F63.1°F76.3°F
Gananoque68.5°F63.1°F76.1°F
Kingston69.1°F63.3°F75.4°F
Dexter69.8°F64°F76.1°F
Henderson Harbor69.6°F64.2°F75.9°F
Pillar Point69.6°F64.2°F75.9°F
Sackets Harbor69.6°F64.2°F75.9°F
Southwick Beach69.4°F63.5°F76.1°F
Greater Napanee69.3°F62.8°F75.2°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 Alexandria Bay 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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