World sea water temperatures

Water temperature in Southwest Harbor in July

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Is it warm enough to swim in Southwest Harbor in July? Average water temperature in Southwest Harbor in July is 55°F and therefore is not suitable for comfortable swimming. The warmest sea in Southwest Harbor in July is 61.5°F, and the coldest is 49.5°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Southwest Harbor

Changes water temperature in Southwest Harbor in July 2025, 2024

To get an accurate forecast for the water temperature in Southwest Harbor for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Southwest Harbor, 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 152.2°F55.2°F50°F56.3°F
July 253.4°F55.2°F50.4°F56.5°F
July 352.2°F55.2°F50.7°F56.3°F
July 454.1°F53.2°F51.1°F56.5°F
July 554.3°F54°F50°F56.1°F
July 654.9°F54.3°F49.5°F56.5°F
July 754.9°F56.5°F51.8°F57.7°F
July 856.5°F57.2°F50°F58.6°F
July 954.9°F57.6°F52°F57.6°F
July 1054.1°F58.6°F52.5°F58.6°F
July 1154.5°F55.9°F53.1°F58.8°F
July 1253.4°F55.9°F50.9°F56.8°F
July 1354°F57.6°F51.3°F59.2°F
July 1452.7°F58.1°F52.2°F59.9°F
July 1554.3°F59.2°F52.2°F59.2°F
Day 2025 2024 Min Max
July 1653.8°F59.4°F52°F59.4°F
July 1753.4°F58.1°F52.3°F58.1°F
July 1854.9°F55.9°F52°F60.1°F
July 1954.7°F58.5°F51.8°F60.3°F
July 2053.2°F58.8°F53.2°F61.3°F
July 2154.7°F58.3°F51.3°F61°F
July 2255.4°F58.1°F51.6°F59°F
July 2355.9°F58.3°F53.1°F59.5°F
July 2456.1°F57°F52°F61.2°F
July 2554.5°F57°F52.2°F59.4°F
July 2655.2°F56.1°F53.4°F56.1°F
July 2755.2°F56.3°F52.9°F59.2°F
July 2855.4°F55.4°F53.1°F59.2°F
July 2956.5°F53.8°F52.9°F61.2°F
July 3055°F55.8°F53.1°F59.2°F
July 3155.4°F54.5°F53.1°F59.9°F
Southwest Harbor water temp chart in July

Average water temperature in Southwest Harbor in July over a decade

20162017201820192020
55.8°F52.9°F54.5°F55.4°F55.8°F
20212022202320242025
55.6°F57.2°F55.8°F56.7°F54.5°F

Southwest Harbor 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

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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 Southwest Harbor 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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