World sea water temperatures

Water temperature in Old Greenwich (CT) in July

Is it warm enough to swim in Old Greenwich in July? Average water temperature in Old Greenwich in July is 72.1°F and therefore suitable for comfortable swimming. The warmest sea in Old Greenwich in July is 77.5°F, and the coldest is 65.7°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Old Greenwich

Changes water temperature in Old Greenwich in July 2025, 2024

To get an accurate forecast for the water temperature in Old Greenwich for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Old Greenwich, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of July.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
July 174.7°F66.9°F66.7°F74.7°F
July 273.2°F66.6°F66.6°F73.2°F
July 372.3°F67.3°F66.6°F73.6°F
July 471.6°F68°F66.4°F74.3°F
July 571.8°F68.7°F66.6°F75.4°F
July 671.6°F70.3°F65.7°F75.7°F
July 772.7°F70.7°F66.4°F75°F
July 874.1°F72°F66.6°F74.5°F
July 973.4°F72.3°F67.5°F73.6°F
July 1073.4°F73.8°F67.8°F74.5°F
July 1173.8°F74.3°F68.4°F74.7°F
July 1272.7°F73.2°F68.4°F75.7°F
July 1375°F75.2°F68°F75.2°F
July 1474.3°F74.5°F68°F74.5°F
July 1576.3°F77.4°F67.6°F77.4°F
Day 2025 2024 Min Max
July 1675.2°F77.5°F67.8°F77.5°F
July 1774.8°F77.5°F68.5°F77.5°F
July 1875.6°F75.7°F68.7°F76.3°F
July 1973.6°F73.6°F69.1°F75.9°F
July 2073.9°F73.9°F69.3°F77°F
July 2174.7°F72°F69.3°F76.5°F
July 2273.4°F72.7°F69.3°F76.8°F
July 2372.5°F72.3°F69.1°F77.5°F
July 2473°F72.5°F69.1°F77.5°F
July 2574.1°F72.1°F69.3°F77.4°F
July 2673.6°F72°F70°F76.6°F
July 2774.3°F72.5°F70.2°F76.8°F
July 2875.4°F72.5°F70.5°F76.8°F
July 2975.9°F73.2°F70.7°F76.5°F
July 3076.5°F73.8°F71.1°F76.5°F
July 3176.3°F76.1°F71.1°F76.3°F
Old Greenwich water temp chart in July

Average water temperature in Old Greenwich in July over a decade

20162017201820192020
72.7°F71.8°F72.7°F72.5°F74.5°F
20212022202320242025
72.5°F71.8°F74.8°F72.7°F73.9°F

Old Greenwich sea state in July

Chart comparing the height of waves in Old Greenwich in July 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 Old Greenwich in July

Old Greenwich 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 July?

Want to know where the water temperature in July 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 July. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Port Chester72.1°F65.5°F77.9°F
West Beach72.3°F65.7°F78.1°F
Bayville72.3°F65.7°F79.3°F
Lattingtown72.3°F65.7°F79.3°F
Oyster Bay Cove72.5°F65.7°F80.1°F
Hempstead Harbor72.3°F65.5°F78.4°F
Rye72.3°F65.5°F78.4°F
Glen Cove72.3°F65.5°F78.4°F
Darien72.3°F65.7°F78.1°F
Centerport72.5°F65.7°F79.9°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 Old Greenwich 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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