World sea water temperatures

Water temperature in Casco Bay (ME) in August

Is it warm enough to swim in Casco Bay in August? Average water temperature in Casco Bay in August is 64.4°F and therefore is not suitable for comfortable swimming. The warmest sea in Casco Bay in August is 70.5°F, and the coldest is 59°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Casco Bay

Changes water temperature in Casco Bay in August 2025, 2024

To get an accurate forecast for the water temperature in Casco 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 Casco Bay, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of August.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
August 163.5°F66.4°F61.2°F70°F
August 263.1°F66°F61.7°F69.4°F
August 363.3°F66.4°F62.4°F68.5°F
August 462.8°F66.7°F62.6°F68.2°F
August 563.1°F65.7°F61.9°F67.8°F
August 664°F65.3°F61.7°F70°F
August 764.6°F64.9°F62.2°F70.5°F
August 865.1°F64.2°F61.9°F69.6°F
August 966.2°F64.4°F61.7°F67.1°F
August 1066.6°F64.6°F61.5°F68°F
August 1168°F63.5°F61.7°F68°F
August 1268.5°F64°F62.1°F68.5°F
August 1368.7°F65.1°F62.1°F69.6°F
August 1467.6°F65.7°F61.9°F70.5°F
August 1566.7°F64.4°F61.3°F68.4°F
Day 2025 2024 Min Max
August 1666.2°F65.1°F60.8°F68°F
August 1766.4°F64.6°F62.1°F67.5°F
August 1864.2°F64.8°F61.3°F69.6°F
August 1963.9°F64.9°F60.4°F69.1°F
August 2063.9°F64.9°F60.3°F68.5°F
August 2164.2°F64.2°F60.6°F67.8°F
August 2263.1°F63.9°F60.8°F68.5°F
August 2362.1°F64.4°F61°F68.2°F
August 2461.2°F65.1°F61.2°F68.7°F
August 2561.2°F64.8°F61°F68.7°F
August 2663.1°F65.7°F60.8°F68°F
August 2762.1°F65.3°F60.8°F66.7°F
August 2862.2°F66.4°F60.8°F66.4°F
August 2961.5°F64°F59°F67.1°F
August 3063°F63.5°F59.9°F66.6°F
August 3162.6°F63.3°F60.4°F65.8°F
Casco Bay water temp chart in August

Average water temperature in Casco Bay in August over a decade

20162017201820192020
64.4°F62.2°F66.2°F64.6°F66.7°F
20212022202320242025
65.7°F66°F64.2°F64.9°F64°F

Casco Bay sea state in August

Chart comparing the height of waves in Casco Bay in August 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 Casco Bay in August

Casco 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 August?

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

AvrMinMax
Bailey Island64.4°F58.8°F71.1°F
Peaks Island64.2°F59°F69.6°F
Yarmouth64.4°F58.8°F72.1°F
Portland64.4°F59°F69.6°F
Scarborough64.9°F59.2°F70.7°F
Georgetown63.5°F59°F70.3°F
Pine Point64.9°F59.2°F71.6°F
Boothbay Harbor63.3°F58.8°F70.3°F
North Bath63.5°F58.1°F71.2°F
Old Orchard Beach65.1°F59°F71.8°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 Casco 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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